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Re: [2/2] calcite git commit: [CALCITE-2345] Running Unit tests with Fongo and integration tests with real mongo instance (Andrei Sereda)


Sorry it was my commit. I should have run site (javadoc) task before
submitting PR.

On Thu, Jun 14, 2018 at 11:05 AM Michael Mior <mmior@xxxxxxxxxx> wrote:

> Done. Thanks for consistently running those tests.
> --
> Michael Mior
> mmior@xxxxxxxxxx
>
>
> Le jeu. 14 juin 2018 à 10:42, Julian Hyde <jhyde@xxxxxxxxxx> a écrit :
>
> > This change introduces a javadoc error:
> >
> > [ERROR]
> >
> /home/jhyde/regress/calcite/mongodb/src/test/java/org/apache/calcite/test/MongoAdapterIT.java:35:
> > error: unexpected end tag: </p>
> > [ERROR]  * </p>
> >
> > Please fix ASAP.
> >
> >
> > > On Jun 13, 2018, at 6:00 PM, mmior@xxxxxxxxxx wrote:
> > >
> > > [CALCITE-2345] Running Unit tests with Fongo and integration tests with
> > real mongo instance (Andrei Sereda)
> > >
> > > Better test coverage for unit tests using Fongo in-memory
> implementation
> > of Mongo API.
> > > New code will decide (at runtime) what connection to make: fongo vs
> > mongo. Identical tests will be run against
> > > both databases (depending on maven profile surefire vs failsafe)
> > >
> > > Close apache/calcite#723
> > >
> > >
> > > Project: http://git-wip-us.apache.org/repos/asf/calcite/repo
> > > Commit: http://git-wip-us.apache.org/repos/asf/calcite/commit/dcf396a5
> > > Tree: http://git-wip-us.apache.org/repos/asf/calcite/tree/dcf396a5
> > > Diff: http://git-wip-us.apache.org/repos/asf/calcite/diff/dcf396a5
> > >
> > > Branch: refs/heads/master
> > > Commit: dcf396a5ca92ee0714c28d9a3c310f53f46220ab
> > > Parents: f84a3eb
> > > Author: Andrei Sereda <andrei@xxxxxxxxxx>
> > > Authored: Tue Jun 5 16:23:56 2018 -0400
> > > Committer: Michael Mior <mmior@xxxxxxxxxxxx>
> > > Committed: Wed Jun 13 18:59:15 2018 -0400
> > >
> > > ----------------------------------------------------------------------
> > > mongodb/pom.xml                                 |  10 +-
> > > .../adapter/mongodb/MongoAdapterTest.java       | 794
> +++++++++++++++---
> > > .../adapter/mongodb/MongoDatabaseRule.java      |  83 ++
> > > .../org/apache/calcite/test/MongoAdapterIT.java | 830
> +------------------
> > > .../apache/calcite/test/MongoAssertions.java    | 101 +++
> > > .../test/resources/mongo-foodmart-model.json    | 221 -----
> > > mongodb/src/test/resources/mongo-model.json     |  70 ++
> > > .../src/test/resources/mongo-zips-model.json    |  41 -
> > > mongodb/src/test/resources/zips-mini.json       | 149 ++++
> > > pom.xml                                         |   9 +
> > > 10 files changed, 1132 insertions(+), 1176 deletions(-)
> > > ----------------------------------------------------------------------
> > >
> > >
> > >
> >
> http://git-wip-us.apache.org/repos/asf/calcite/blob/dcf396a5/mongodb/pom.xml
> > > ----------------------------------------------------------------------
> > > diff --git a/mongodb/pom.xml b/mongodb/pom.xml
> > > index 25c0642..63cc147 100644
> > > --- a/mongodb/pom.xml
> > > +++ b/mongodb/pom.xml
> > > @@ -71,6 +71,11 @@ limitations under the License.
> > >       <scope>test</scope>
> > >     </dependency>
> > >     <dependency>
> > > +      <groupId>net.hydromatic</groupId>
> > > +      <artifactId>foodmart-data-json</artifactId>
> > > +      <scope>test</scope>
> > > +    </dependency>
> > > +    <dependency>
> > >       <groupId>org.mongodb</groupId>
> > >       <artifactId>mongo-java-driver</artifactId>
> > >     </dependency>
> > > @@ -78,11 +83,6 @@ limitations under the License.
> > >       <groupId>org.slf4j</groupId>
> > >       <artifactId>slf4j-api</artifactId>
> > >     </dependency>
> > > -    <dependency>
> > > -      <groupId>org.slf4j</groupId>
> > > -      <artifactId>slf4j-log4j12</artifactId>
> > > -      <scope>test</scope>
> > > -    </dependency>
> > >   </dependencies>
> > >
> > >   <build>
> > >
> > >
> >
> http://git-wip-us.apache.org/repos/asf/calcite/blob/dcf396a5/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoAdapterTest.java
> > > ----------------------------------------------------------------------
> > > diff --git
> >
> a/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoAdapterTest.java
> >
> b/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoAdapterTest.java
> > > index b6ca4f3..a4061e4 100644
> > > ---
> >
> a/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoAdapterTest.java
> > > +++
> >
> b/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoAdapterTest.java
> > > @@ -16,143 +16,749 @@
> > >  */
> > > package org.apache.calcite.adapter.mongodb;
> > >
> > > -import org.apache.calcite.jdbc.CalciteConnection;
> > > +import org.apache.calcite.schema.Schema;
> > > +import org.apache.calcite.schema.SchemaFactory;
> > > import org.apache.calcite.schema.SchemaPlus;
> > > import org.apache.calcite.test.CalciteAssert;
> > > +import org.apache.calcite.test.MongoAssertions;
> > >
> > > -import com.github.fakemongo.junit.FongoRule;
> > > +
> > > +import org.apache.calcite.util.Bug;
> > > +import org.apache.calcite.util.Util;
> > > +
> > > +import com.google.common.base.Function;
> > > +import com.google.common.base.Preconditions;
> > > +import com.google.common.io.LineProcessor;
> > > +import com.google.common.io.Resources;
> > > import com.mongodb.client.MongoCollection;
> > > import com.mongodb.client.MongoDatabase;
> > >
> > > +import net.hydromatic.foodmart.data.json.FoodmartJson;
> > > +
> > > +import org.bson.BsonDateTime;
> > > import org.bson.BsonDocument;
> > > +import org.bson.BsonInt32;
> > > +import org.bson.BsonString;
> > > import org.bson.Document;
> > >
> > > -import org.junit.Before;
> > > +import org.hamcrest.CoreMatchers;
> > > +
> > > +import org.junit.Assert;
> > > +import org.junit.BeforeClass;
> > > +import org.junit.ClassRule;
> > > import org.junit.Ignore;
> > > -import org.junit.Rule;
> > > import org.junit.Test;
> > >
> > > -import java.sql.Connection;
> > > -import java.sql.DriverManager;
> > > +import java.io.IOException;
> > > +import java.io.UncheckedIOException;
> > > +import java.net.URL;
> > > +import java.nio.charset.StandardCharsets;
> > > +import java.sql.ResultSet;
> > > import java.sql.SQLException;
> > > +import java.text.SimpleDateFormat;
> > > +import java.util.Date;
> > > +import java.util.List;
> > > +import java.util.Locale;
> > > +import java.util.Map;
> > >
> > > /**
> > > - * Tests current adapter using in-memory (fake) implementation of
> Mongo
> > API:
> > > - * <a href="https://github.com/fakemongo/fongo";>Fongo</a>.
> > > - *
> > > + * Testing mongo adapter functionality. By default runs with
> > > + * <a href="https://github.com/fakemongo/fongo";>Fongo</a> unless
> > {@code IT} maven profile is enabled
> > > + * (via {@code $ mvn -Pit install}).
> > >  */
> > > -public class MongoAdapterTest {
> > > +public class MongoAdapterTest implements SchemaFactory {
> > > +
> > > +  /** Connection factory based on the "mongo-zips" model. */
> > > +  protected static final URL MODEL =
> > MongoAdapterTest.class.getResource("/mongo-model.json");
> > > +
> > > +  /** Number of records in local file */
> > > +  protected static final int ZIPS_SIZE = 149;
> > > +
> > > +  @ClassRule
> > > +  public static final MongoDatabaseRule RULE =
> > MongoDatabaseRule.create();
> > > +
> > > +  private static MongoSchema schema;
> > > +
> > > +  @BeforeClass
> > > +  public static void setUp() throws Exception {
> > > +    MongoDatabase database = RULE.database();
> > > +
> > > +    populate(database.getCollection("zips"),
> > MongoAdapterTest.class.getResource("/zips-mini.json"));
> > > +    populate(database.getCollection("store"),
> > FoodmartJson.class.getResource("/store.json"));
> > > +    populate(database.getCollection("warehouse"),
> > > +            FoodmartJson.class.getResource("/warehouse.json"));
> > >
> > > -  @Rule
> > > -  public final FongoRule rule = new FongoRule();
> > > +    // Manually insert data for data-time test.
> > > +    MongoCollection<BsonDocument> datatypes =
> > database.getCollection("datatypes")
> > > +            .withDocumentClass(BsonDocument.class);
> > > +    if (datatypes.count() > 0) {
> > > +      datatypes.deleteMany(new BsonDocument());
> > > +    }
> > > +    BsonDocument doc = new BsonDocument();
> > > +    Date date = new SimpleDateFormat("yyyy-MM-dd",
> > Locale.getDefault()).parse("2012-09-05");
> > > +    doc.put("date", new BsonDateTime(date.getTime()));
> > > +    doc.put("value", new BsonInt32(1231));
> > > +    doc.put("ownerId", new BsonString("531e7789e4b0853ddb861313"));
> > > +    datatypes.insertOne(doc);
> > >
> > > -  private MongoDatabase mongoDb;
> > > -  private MongoCollection<Document> zips;
> > > +    schema = new MongoSchema(database);
> > > +  }
> > > +
> > > +  private static void populate(MongoCollection<Document> collection,
> > URL resource)
> > > +          throws IOException {
> > > +    Preconditions.checkNotNull(collection, "collection");
> > > +
> > > +    if (collection.count() > 0) {
> > > +      // delete any existing documents (run from a clean set)
> > > +      collection.deleteMany(new BsonDocument());
> > > +    }
> > >
> > > -  @Before
> > > -  public void setUp() throws Exception {
> > > -    mongoDb = rule.getDatabase(getClass().getSimpleName());
> > > -    zips = mongoDb.getCollection("zips");
> > > +    MongoCollection<BsonDocument> bsonCollection =
> > collection.withDocumentClass(BsonDocument.class);
> > > +    Resources.readLines(resource, StandardCharsets.UTF_8, new
> > LineProcessor<Void>() {
> > > +      @Override public boolean processLine(String line) throws
> > IOException {
> > > +        bsonCollection.insertOne(BsonDocument.parse(line));
> > > +        return true;
> > > +      }
> > > +
> > > +      @Override public Void getResult() {
> > > +        return null;
> > > +      }
> > > +    });
> > >   }
> > >
> > >   /**
> > > -   * Handcrafted connection where we manually added {@link
> MongoSchema}
> > > +   *  Returns always the same schema to avoid initialization costs.
> > >    */
> > > -  private CalciteAssert.ConnectionFactory newConnectionFactory() {
> > > -    return new CalciteAssert.ConnectionFactory() {
> > > -      @Override public Connection createConnection() throws
> > SQLException {
> > > -        Connection connection =
> > DriverManager.getConnection("jdbc:calcite:");
> > > -        final SchemaPlus root =
> > connection.unwrap(CalciteConnection.class).getRootSchema();
> > > -        root.add("mongo", new MongoSchema(mongoDb));
> > > -        return connection;
> > > -      }
> > > -    };
> > > +  @Override public Schema create(SchemaPlus parentSchema, String name,
> > > +                                 Map<String, Object> operand) {
> > > +    return schema;
> > > +  }
> > > +
> > > +  private CalciteAssert.AssertThat assertModel(String model) {
> > > +    // ensure that Schema from this instance is being used
> > > +    model = model.replace(MongoSchemaFactory.class.getName(),
> > MongoAdapterTest.class.getName());
> > > +
> > > +    return CalciteAssert.that()
> > > +            .withModel(model);
> > > +  }
> > > +
> > > +  private CalciteAssert.AssertThat assertModel(URL url) {
> > > +    Preconditions.checkNotNull(url, "url");
> > > +    try {
> > > +      return assertModel(Resources.toString(url,
> > StandardCharsets.UTF_8));
> > > +    } catch (IOException e) {
> > > +      throw new UncheckedIOException(e);
> > > +    }
> > >   }
> > >
> > >   @Test
> > > -  public void single() {
> > > -    zips.insertOne(new Document());
> > > -    CalciteAssert.that()
> > > -            .with(newConnectionFactory())
> > > -            .query("select * from \"mongo\".\"zips\"")
> > > +  public void testSort() {
> > > +    assertModel(MODEL)
> > > +            .query("select * from zips order by state")
> > > +            .returnsCount(ZIPS_SIZE)
> > > +            .explainContains("PLAN=MongoToEnumerableConverter\n"
> > > +                    + "  MongoSort(sort0=[$4], dir0=[ASC])\n"
> > > +                    + "    MongoProject(CITY=[CAST(ITEM($0,
> > 'city')):VARCHAR(20) CHARACTER SET \"ISO-8859-1\" COLLATE
> > \"ISO-8859-1$en_US$primary\"], LONGITUDE=[CAST(ITEM(ITEM($0, 'loc'),
> > 0)):FLOAT], LATITUDE=[CAST(ITEM(ITEM($0, 'loc'), 1)):FLOAT],
> > POP=[CAST(ITEM($0, 'pop')):INTEGER], STATE=[CAST(ITEM($0,
> > 'state')):VARCHAR(2) CHARACTER SET \"ISO-8859-1\" COLLATE
> > \"ISO-8859-1$en_US$primary\"], ID=[CAST(ITEM($0, '_id')):VARCHAR(5)
> > CHARACTER SET \"ISO-8859-1\" COLLATE \"ISO-8859-1$en_US$primary\"])\n"
> > > +                    + "      MongoTableScan(table=[[mongo_raw,
> > zips]])");
> > > +  }
> > > +
> > > +  @Test public void testSortLimit() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, id from zips\n"
> > > +                    + "order by state, id offset 2 rows fetch next 3
> > rows only")
> > > +            .returns("STATE=AK; ID=99801\n"
> > > +                    + "STATE=AL; ID=35215\n"
> > > +                    + "STATE=AL; ID=35401\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {STATE: '$state', ID:
> '$_id'}}",
> > > +                            "{$sort: {STATE: 1, ID: 1}}",
> > > +                            "{$skip: 2}",
> > > +                            "{$limit: 3}"));
> > > +  }
> > > +
> > > +  @Test public void testOffsetLimit() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, id from zips\n"
> > > +                    + "offset 2 fetch next 3 rows only")
> > >             .runs()
> > > -            .returnsCount(1);
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$skip: 2}",
> > > +                            "{$limit: 3}",
> > > +                            "{$project: {STATE: '$state', ID:
> > '$_id'}}"));
> > >   }
> > >
> > > -  @Test
> > > -  public void empty() {
> > > -    // for some reason fongo doesn't list collection if it was unused
> > > -    zips.insertOne(new Document());
> > > -    zips.deleteMany(new BsonDocument());
> > > -
> > > -    CalciteAssert.that()
> > > -            .with(newConnectionFactory())
> > > -            .query("select * from \"mongo\".\"zips\"")
> > > +  @Test public void testLimit() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, id from zips\n"
> > > +                    + "fetch next 3 rows only")
> > >             .runs()
> > > -            .returnsCount(0);
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$limit: 3}",
> > > +                            "{$project: {STATE: '$state', ID:
> > '$_id'}}"));
> > >   }
> > >
> > > -  @Test
> > > -  public void filter() {
> > > -    zips.insertOne(new Document("CITY", "New York").append("STATE",
> > "NY"));
> > > -    zips.insertOne(new Document("CITY", "Washington").append("STATE",
> > "DC"));
> > > +  @Ignore
> > > +  @Test public void testFilterSort() {
> > > +    // LONGITUDE and LATITUDE are null because of CALCITE-194.
> > > +    Util.discard(Bug.CALCITE_194_FIXED);
> > > +    assertModel(MODEL)
> > > +            .query("select * from zips\n"
> > > +                    + "where city = 'SPRINGFIELD' and id >= '70000'\n"
> > > +                    + "order by state, id")
> > > +            .returns(""
> > > +                    + "CITY=SPRINGFIELD; LONGITUDE=null;
> LATITUDE=null;
> > POP=752; STATE=AR; ID=72157\n"
> > > +                    + "CITY=SPRINGFIELD; LONGITUDE=null;
> LATITUDE=null;
> > POP=1992; STATE=CO; ID=81073\n"
> > > +                    + "CITY=SPRINGFIELD; LONGITUDE=null;
> LATITUDE=null;
> > POP=5597; STATE=LA; ID=70462\n"
> > > +                    + "CITY=SPRINGFIELD; LONGITUDE=null;
> LATITUDE=null;
> > POP=32384; STATE=OR; ID=97477\n"
> > > +                    + "CITY=SPRINGFIELD; LONGITUDE=null;
> LATITUDE=null;
> > POP=27521; STATE=OR; ID=97478\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{\n"
> > > +                                    + "  $match: {\n"
> > > +                                    + "    city: \"SPRINGFIELD\",\n"
> > > +                                    + "    _id: {\n"
> > > +                                    + "      $gte: \"70000\"\n"
> > > +                                    + "    }\n"
> > > +                                    + "  }\n"
> > > +                                    + "}",
> > > +                            "{$project: {CITY: '$city', LONGITUDE:
> > '$loc[0]', LATITUDE: '$loc[1]', POP: '$pop', STATE: '$state', ID:
> '$_id'}}",
> > > +                            "{$sort: {STATE: 1, ID: 1}}"))
> > > +            .explainContains("PLAN=MongoToEnumerableConverter\n"
> > > +                    + "  MongoSort(sort0=[$4], sort1=[$5], dir0=[ASC],
> > dir1=[ASC])\n"
> > > +                    + "    MongoProject(CITY=[CAST(ITEM($0,
> > 'city')):VARCHAR(20) CHARACTER SET \"ISO-8859-1\" COLLATE
> > \"ISO-8859-1$en_US$primary\"], LONGITUDE=[CAST(ITEM(ITEM($0, 'loc'),
> > 0)):FLOAT], LATITUDE=[CAST(ITEM(ITEM($0, 'loc'), 1)):FLOAT],
> > POP=[CAST(ITEM($0, 'pop')):INTEGER], STATE=[CAST(ITEM($0,
> > 'state')):VARCHAR(2) CHARACTER SET \"ISO-8859-1\" COLLATE
> > \"ISO-8859-1$en_US$primary\"], ID=[CAST(ITEM($0, '_id')):VARCHAR(5)
> > CHARACTER SET \"ISO-8859-1\" COLLATE \"ISO-8859-1$en_US$primary\"])\n"
> > > +                    + "
> MongoFilter(condition=[AND(=(CAST(ITEM($0,
> > 'city')):VARCHAR(20) CHARACTER SET \"ISO-8859-1\" COLLATE
> > \"ISO-8859-1$en_US$primary\", 'SPRINGFIELD'), >=(CAST(ITEM($0,
> > '_id')):VARCHAR(5) CHARACTER SET \"ISO-8859-1\" COLLATE
> > \"ISO-8859-1$en_US$primary\", '70000'))])\n"
> > > +                    + "        MongoTableScan(table=[[mongo_raw,
> > zips]])");
> > > +  }
> > >
> > > -    CalciteAssert.that()
> > > -            .with(newConnectionFactory())
> > > -            .query("select cast(_MAP['CITY'] as varchar(20)) as
> > \"city\" from \"mongo\".\"zips\" "
> > > -                    + " where _MAP['STATE'] = 'NY'")
> > > -            .returns("city=New York\n");
> > > +  @Test public void testFilterSortDesc() {
> > > +    assertModel(MODEL)
> > > +            .query("select * from zips\n"
> > > +                    + "where pop BETWEEN 45000 AND 46000\n"
> > > +                    + "order by state desc, pop")
> > > +            .limit(4)
> > > +            .returns("CITY=BECKLEY; LONGITUDE=null; LATITUDE=null;
> > POP=45196; STATE=WV; ID=25801\n"
> > > +                    + "CITY=ROCKERVILLE; LONGITUDE=null;
> LATITUDE=null;
> > POP=45328; STATE=SD; ID=57701\n"
> > > +                    + "CITY=PAWTUCKET; LONGITUDE=null; LATITUDE=null;
> > POP=45442; STATE=RI; ID=02860\n"
> > > +                    + "CITY=LAWTON; LONGITUDE=null; LATITUDE=null;
> > POP=45542; STATE=OK; ID=73505\n");
> > > +  }
> > >
> > > -    CalciteAssert.that()
> > > -            .with(newConnectionFactory())
> > > -            .query("select cast(_MAP['CITY'] as varchar(20)) as
> > \"city\" from \"mongo\".\"zips\" "
> > > -                   + " where _MAP['STATE'] = 'DC'")
> > > -            .returns("city=Washington\n");
> > > +  @Ignore("broken; [CALCITE-2115] is logged to fix it")
> > > +  @Test public void testUnionPlan() {
> > > +    assertModel(MODEL)
> > > +            .query("select * from \"sales_fact_1997\"\n"
> > > +                    + "union all\n"
> > > +                    + "select * from \"sales_fact_1998\"")
> > > +            .explainContains("PLAN=EnumerableUnion(all=[true])\n"
> > > +                    + "  MongoToEnumerableConverter\n"
> > > +                    + "    MongoProject(product_id=[CAST(ITEM($0,
> > 'product_id')):DOUBLE])\n"
> > > +                    + "      MongoTableScan(table=[[_foodmart,
> > sales_fact_1997]])\n"
> > > +                    + "  MongoToEnumerableConverter\n"
> > > +                    + "    MongoProject(product_id=[CAST(ITEM($0,
> > 'product_id')):DOUBLE])\n"
> > > +                    + "      MongoTableScan(table=[[_foodmart,
> > sales_fact_1998]])")
> > > +            .limit(2)
> > > +            .returns(
> > > +                    MongoAssertions.checkResultUnordered(
> > > +                            "product_id=337", "product_id=1512"));
> > > +  }
> > >
> > > -    CalciteAssert.that()
> > > -            .with(newConnectionFactory())
> > > -            .query("select cast(_MAP['CITY'] as varchar(20)) as
> > \"city\" from \"mongo\".\"zips\" "
> > > -                    + " where _MAP['STATE'] in ('DC', 'NY')")
> > > -            .returns("city=New York\ncity=Washington\n");
> > > +  @Ignore(
> > > +          "java.lang.ClassCastException: java.lang.Integer cannot be
> > cast to java.lang.Double")
> > > +  @Test public void testFilterUnionPlan() {
> > > +    assertModel(MODEL)
> > > +            .query("select * from (\n"
> > > +                    + "  select * from \"sales_fact_1997\"\n"
> > > +                    + "  union all\n"
> > > +                    + "  select * from \"sales_fact_1998\")\n"
> > > +                    + "where \"product_id\" = 1")
> > > +            .runs();
> > >   }
> > >
> > > -  @Test
> > > -  public void limit() {
> > > -    zips.insertOne(new Document("CITY", "New York").append("STATE",
> > "NY"));
> > > -    zips.insertOne(new Document("CITY", "Washington").append("STATE",
> > "DC"));
> > > +  /** Tests that we don't generate multiple constraints on the same
> > column.
> > > +   * MongoDB doesn't like it. If there is an '=', it supersedes all
> > other
> > > +   * operators. */
> > > +  @Test public void testFilterRedundant() {
> > > +    assertModel(MODEL)
> > > +            .query(
> > > +                    "select * from zips where state > 'CA' and state <
> > 'AZ' and state = 'OK'")
> > > +            .runs()
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{\n"
> > > +                                    + "  \"$match\": {\n"
> > > +                                    + "    \"state\": \"OK\"\n"
> > > +                                    + "  }\n"
> > > +                                    + "}",
> > > +                            "{$project: {CITY: '$city', LONGITUDE:
> > '$loc[0]', LATITUDE: '$loc[1]', POP: '$pop', STATE: '$state', ID:
> > '$_id'}}"));
> > > +  }
> > > +
> > > +  @Test public void testSelectWhere() {
> > > +    assertModel(MODEL)
> > > +            .query(
> > > +                    "select * from \"warehouse\" where
> > \"warehouse_state_province\" = 'CA'")
> > > +            .explainContains("PLAN=MongoToEnumerableConverter\n"
> > > +                    + "  MongoProject(warehouse_id=[CAST(ITEM($0,
> > 'warehouse_id')):DOUBLE], warehouse_state_province=[CAST(ITEM($0,
> > 'warehouse_state_province')):VARCHAR(20) CHARACTER SET \"ISO-8859-1\"
> > COLLATE \"ISO-8859-1$en_US$primary\"])\n"
> > > +                    + "    MongoFilter(condition=[=(CAST(ITEM($0,
> > 'warehouse_state_province')):VARCHAR(20) CHARACTER SET \"ISO-8859-1\"
> > COLLATE \"ISO-8859-1$en_US$primary\", 'CA')])\n"
> > > +                    + "      MongoTableScan(table=[[mongo_raw,
> > warehouse]])")
> > > +            .returns(
> > > +                    MongoAssertions.checkResultUnordered(
> > > +                            "warehouse_id=6;
> > warehouse_state_province=CA",
> > > +                            "warehouse_id=7;
> > warehouse_state_province=CA",
> > > +                            "warehouse_id=14;
> > warehouse_state_province=CA",
> > > +                            "warehouse_id=24;
> > warehouse_state_province=CA"))
> > > +            .queryContains(
> > > +                    // Per
> > https://issues.apache.org/jira/browse/CALCITE-164,
> > > +                    // $match must occur before $project for good
> > performance.
> > > +                    mongoChecker(
> > > +                            "{\n"
> > > +                                    + "  \"$match\": {\n"
> > > +                                    + "
> > \"warehouse_state_province\": \"CA\"\n"
> > > +                                    + "  }\n"
> > > +                                    + "}",
> > > +                            "{$project: {warehouse_id: 1,
> > warehouse_state_province: 1}}"));
> > > +  }
> > >
> > > -    CalciteAssert.that()
> > > -            .with(newConnectionFactory())
> > > -            .query("select * from \"mongo\".\"zips\" limit 1")
> > > -            .returnsCount(1);
> > > +  @Test public void testInPlan() {
> > > +    assertModel(MODEL)
> > > +            .query("select \"store_id\", \"store_name\" from
> > \"store\"\n"
> > > +                    + "where \"store_name\" in ('Store 1', 'Store 10',
> > 'Store 11', 'Store 15', 'Store 16', 'Store 24', 'Store 3', 'Store 7')")
> > > +            .returns(
> > > +                    MongoAssertions.checkResultUnordered(
> > > +                            "store_id=1; store_name=Store 1",
> > > +                            "store_id=3; store_name=Store 3",
> > > +                            "store_id=7; store_name=Store 7",
> > > +                            "store_id=10; store_name=Store 10",
> > > +                            "store_id=11; store_name=Store 11",
> > > +                            "store_id=15; store_name=Store 15",
> > > +                            "store_id=16; store_name=Store 16",
> > > +                            "store_id=24; store_name=Store 24"))
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{\n"
> > > +                                    + "  \"$match\": {\n"
> > > +                                    + "    \"$or\": [\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"store_name\": \"Store
> > 1\"\n"
> > > +                                    + "      },\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"store_name\": \"Store
> > 10\"\n"
> > > +                                    + "      },\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"store_name\": \"Store
> > 11\"\n"
> > > +                                    + "      },\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"store_name\": \"Store
> > 15\"\n"
> > > +                                    + "      },\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"store_name\": \"Store
> > 16\"\n"
> > > +                                    + "      },\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"store_name\": \"Store
> > 24\"\n"
> > > +                                    + "      },\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"store_name\": \"Store
> > 3\"\n"
> > > +                                    + "      },\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"store_name\": \"Store
> > 7\"\n"
> > > +                                    + "      }\n"
> > > +                                    + "    ]\n"
> > > +                                    + "  }\n"
> > > +                                    + "}",
> > > +                            "{$project: {store_id: 1, store_name:
> > 1}}"));
> > > +  }
> > >
> > > -    CalciteAssert.that()
> > > -            .with(newConnectionFactory())
> > > -            .query("select * from \"mongo\".\"zips\" limit 2")
> > > -            .returnsCount(2);
> > > +  /** Simple query based on the "mongo-zips" model. */
> > > +  @Test public void testZips() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, city from zips")
> > > +            .returnsCount(ZIPS_SIZE);
> > > +  }
> > >
> > > +  @Test public void testCountGroupByEmpty() {
> > > +    assertModel(MODEL)
> > > +            .query("select count(*) from zips")
> > > +            .returns(String.format(Locale.getDefault(), "EXPR$0=%d\n",
> > ZIPS_SIZE))
> > > +            .explainContains("PLAN=MongoToEnumerableConverter\n"
> > > +                    + "  MongoAggregate(group=[{}],
> EXPR$0=[COUNT()])\n"
> > > +                    + "    MongoTableScan(table=[[mongo_raw, zips]])")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$group: {_id: {}, 'EXPR$0': {$sum:
> > 1}}}"));
> > >   }
> > >
> > > -  /**
> > > -   * Following queries are not supported in Mongo adapter :
> > > -   * <pre>
> > > -   * {@code A and (B or C)}
> > > -   * {@code (A or B) and C}
> > > -   * </pre>
> > > +  @Test public void testCountGroupByEmptyMultiplyBy2() {
> > > +    // This operation is not supported by fongo:
> > https://github.com/fakemongo/fongo/issues/152
> > > +    MongoAssertions.assumeRealMongoInstance();
> > > +
> > > +    assertModel(MODEL)
> > > +            .query("select count(*)*2 from zips")
> > > +            .returns(String.format(Locale.getDefault(), "EXPR$0=%d\n",
> > ZIPS_SIZE * 2))
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$group: {_id: {}, _0: {$sum: 1}}}",
> > > +                            "{$project: {'EXPR$0': {$multiply: ['$_0',
> > {$literal: 2}]}}}"));
> > > +  }
> > > +
> > > +  @Test public void testGroupByOneColumnNotProjected() {
> > > +    assertModel(MODEL)
> > > +            .query("select count(*) from zips group by state order by
> > 1")
> > > +            .limit(2)
> > > +            .returns("EXPR$0=2\n"
> > > +                    + "EXPR$0=2\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {STATE: '$state'}}",
> > > +                            "{$group: {_id: '$STATE', 'EXPR$0': {$sum:
> > 1}}}",
> > > +                            "{$project: {STATE: '$_id', 'EXPR$0':
> > '$EXPR$0'}}",
> > > +                            "{$project: {'EXPR$0': 1}}",
> > > +                            "{$sort: {EXPR$0: 1}}"));
> > > +  }
> > > +
> > > +  @Test public void testGroupByOneColumn() {
> > > +    assertModel(MODEL)
> > > +            .query(
> > > +                    "select state, count(*) as c from zips group by
> > state order by state")
> > > +            .limit(2)
> > > +            .returns("STATE=AK; C=3\nSTATE=AL; C=3\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {STATE: '$state'}}",
> > > +                            "{$group: {_id: '$STATE', C: {$sum: 1}}}",
> > > +                            "{$project: {STATE: '$_id', C: '$C'}}",
> > > +                            "{$sort: {STATE: 1}}"));
> > > +  }
> > > +
> > > +  @Test public void testGroupByOneColumnReversed() {
> > > +    // Note extra $project compared to testGroupByOneColumn.
> > > +    assertModel(MODEL)
> > > +            .query(
> > > +                    "select count(*) as c, state from zips group by
> > state order by state")
> > > +            .limit(2)
> > > +            .returns("C=3; STATE=AK\nC=3; STATE=AL\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {STATE: '$state'}}",
> > > +                            "{$group: {_id: '$STATE', C: {$sum: 1}}}",
> > > +                            "{$project: {STATE: '$_id', C: '$C'}}",
> > > +                            "{$project: {C: 1, STATE: 1}}",
> > > +                            "{$sort: {STATE: 1}}"));
> > > +  }
> > > +
> > > +  @Test public void testGroupByAvg() {
> > > +    assertModel(MODEL)
> > > +            .query(
> > > +                    "select state, avg(pop) as a from zips group by
> > state order by state")
> > > +            .limit(2)
> > > +            .returns("STATE=AK; A=26856\nSTATE=AL; A=43383\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {POP: '$pop', STATE:
> > '$state'}}",
> > > +                            "{$group: {_id: '$STATE', A: {$avg:
> > '$POP'}}}",
> > > +                            "{$project: {STATE: '$_id', A: '$A'}}",
> > > +                            "{$sort: {STATE: 1}}"));
> > > +  }
> > > +
> > > +  @Test public void testGroupByAvgSumCount() {
> > > +    // This operation not supported by fongo:
> > https://github.com/fakemongo/fongo/issues/152
> > > +    MongoAssertions.assumeRealMongoInstance();
> > > +    assertModel(MODEL)
> > > +            .query(
> > > +                    "select state, avg(pop) as a, sum(pop) as s,
> > count(pop) as c from zips group by state order by state")
> > > +            .limit(2)
> > > +            .returns("STATE=AK; A=26856; S=80568; C=3\n"
> > > +                    + "STATE=AL; A=43383; S=130151; C=3\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {POP: '$pop', STATE:
> > '$state'}}",
> > > +                            "{$group: {_id: '$STATE', _1: {$sum:
> > '$POP'}, _2: {$sum: {$cond: [ {$eq: ['POP', null]}, 0, 1]}}}}",
> > > +                            "{$project: {STATE: '$_id', _1: '$_1', _2:
> > '$_2'}}",
> > > +                            "{$sort: {STATE: 1}}",
> > > +                            "{$project: {STATE: 1, A: {$divide:
> > [{$cond:[{$eq: ['$_2', {$literal: 0}]},null,'$_1']}, '$_2']}, S:
> > {$cond:[{$eq: ['$_2', {$literal: 0}]},null,'$_1']}, C: '$_2'}}"));
> > > +  }
> > > +
> > > +  @Test public void testGroupByHaving() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, count(*) as c from zips\n"
> > > +                    + "group by state having count(*) > 2 order by
> > state")
> > > +            .returnsCount(47)
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {STATE: '$state'}}",
> > > +                            "{$group: {_id: '$STATE', C: {$sum: 1}}}",
> > > +                            "{$project: {STATE: '$_id', C: '$C'}}",
> > > +                            "{\n"
> > > +                                    + "  \"$match\": {\n"
> > > +                                    + "    \"C\": {\n"
> > > +                                    + "      \"$gt\": 2\n"
> > > +                                    + "    }\n"
> > > +                                    + "  }\n"
> > > +                                    + "}",
> > > +                            "{$sort: {STATE: 1}}"));
> > > +  }
> > > +
> > > +  @Ignore("https://issues.apache.org/jira/browse/CALCITE-270";)
> > > +  @Test public void testGroupByHaving2() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, count(*) as c from zips\n"
> > > +                    + "group by state having sum(pop) > 12000000")
> > > +            .returns("STATE=NY; C=1596\n"
> > > +                    + "STATE=TX; C=1676\n"
> > > +                    + "STATE=FL; C=826\n"
> > > +                    + "STATE=CA; C=1523\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {STATE: '$state', POP:
> > '$pop'}}",
> > > +                            "{$group: {_id: '$STATE', C: {$sum: 1},
> _2:
> > {$sum: '$POP'}}}",
> > > +                            "{$project: {STATE: '$_id', C: '$C', _2:
> > '$_2'}}",
> > > +                            "{\n"
> > > +                                    + "  $match: {\n"
> > > +                                    + "    _2: {\n"
> > > +                                    + "      $gt: 12000000\n"
> > > +                                    + "    }\n"
> > > +                                    + "  }\n"
> > > +                                    + "}",
> > > +                            "{$project: {STATE: 1, C: 1}}"));
> > > +  }
> > > +
> > > +  @Test public void testGroupByMinMaxSum() {
> > > +    assertModel(MODEL)
> > > +            .query("select count(*) as c, state,\n"
> > > +                    + " min(pop) as min_pop, max(pop) as max_pop,
> > sum(pop) as sum_pop\n"
> > > +                    + "from zips group by state order by state")
> > > +            .limit(2)
> > > +            .returns("C=3; STATE=AK; MIN_POP=23238; MAX_POP=32383;
> > SUM_POP=80568\n"
> > > +                    + "C=3; STATE=AL; MIN_POP=42124; MAX_POP=44165;
> > SUM_POP=130151\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {POP: '$pop', STATE:
> > '$state'}}",
> > > +                            "{$group: {_id: '$STATE', C: {$sum: 1},
> > MIN_POP: {$min: '$POP'}, MAX_POP: {$max: '$POP'}, SUM_POP: {$sum:
> > '$POP'}}}",
> > > +                            "{$project: {STATE: '$_id', C: '$C',
> > MIN_POP: '$MIN_POP', MAX_POP: '$MAX_POP', SUM_POP: '$SUM_POP'}}",
> > > +                            "{$project: {C: 1, STATE: 1, MIN_POP: 1,
> > MAX_POP: 1, SUM_POP: 1}}",
> > > +                            "{$sort: {STATE: 1}}"));
> > > +  }
> > > +
> > > +  @Test public void testGroupComposite() {
> > > +    assertModel(MODEL)
> > > +            .query("select count(*) as c, state, city from zips\n"
> > > +                    + "group by state, city\n"
> > > +                    + "order by c desc, city\n"
> > > +                    + "limit 2")
> > > +            .returns("C=1; STATE=SD; CITY=ABERDEEN\n"
> > > +                      + "C=1; STATE=SC; CITY=AIKEN\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {CITY: '$city', STATE:
> > '$state'}}",
> > > +                            "{$group: {_id: {CITY: '$CITY', STATE:
> > '$STATE'}, C: {$sum: 1}}}",
> > > +                            "{$project: {_id: 0, CITY: '$_id.CITY',
> > STATE: '$_id.STATE', C: '$C'}}",
> > > +                            "{$sort: {C: -1, CITY: 1}}",
> > > +                            "{$limit: 2}",
> > > +                            "{$project: {C: 1, STATE: 1, CITY: 1}}"));
> > > +  }
> > > +
> > > +  @Ignore("broken; [CALCITE-2115] is logged to fix it")
> > > +  @Test public void testDistinctCount() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, count(distinct city) as cdc from
> > zips\n"
> > > +                    + "where state in ('CA', 'TX') group by state
> order
> > by state")
> > > +            .returns("STATE=CA; CDC=1072\n"
> > > +                    + "STATE=TX; CDC=1233\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{\n"
> > > +                                    + "  \"$match\": {\n"
> > > +                                    + "    \"$or\": [\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"state\": \"CA\"\n"
> > > +                                    + "      },\n"
> > > +                                    + "      {\n"
> > > +                                    + "        \"state\": \"TX\"\n"
> > > +                                    + "      }\n"
> > > +                                    + "    ]\n"
> > > +                                    + "  }\n"
> > > +                                    + "}",
> > > +                            "{$project: {CITY: '$city', STATE:
> > '$state'}}",
> > > +                            "{$group: {_id: {CITY: '$CITY', STATE:
> > '$STATE'}}}",
> > > +                            "{$project: {_id: 0, CITY: '$_id.CITY',
> > STATE: '$_id.STATE'}}",
> > > +                            "{$group: {_id: '$STATE', CDC: {$sum:
> > {$cond: [ {$eq: ['CITY', null]}, 0, 1]}}}}",
> > > +                            "{$project: {STATE: '$_id', CDC:
> '$CDC'}}",
> > > +                            "{$sort: {STATE: 1}}"));
> > > +  }
> > > +
> > > +  @Test public void testDistinctCountOrderBy() {
> > > +    // java.lang.ClassCastException: com.mongodb.BasicDBObject cannot
> > be cast to java.lang.Number
> > > +    // https://github.com/fakemongo/fongo/issues/152
> > > +    MongoAssertions.assumeRealMongoInstance();
> > > +    assertModel(MODEL)
> > > +            .query("select state, count(distinct city) as cdc\n"
> > > +                    + "from zips\n"
> > > +                    + "group by state\n"
> > > +                    + "order by cdc desc limit 5")
> > > +            .returns("STATE=VA; CDC=3\n"
> > > +                    + "STATE=NY; CDC=3\n"
> > > +                    + "STATE=SC; CDC=3\n"
> > > +                    + "STATE=RI; CDC=3\n"
> > > +                    + "STATE=WV; CDC=3\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {CITY: '$city', STATE:
> > '$state'}}",
> > > +                            "{$group: {_id: {CITY: '$CITY', STATE:
> > '$STATE'}}}",
> > > +                            "{$project: {_id: 0, CITY: '$_id.CITY',
> > STATE: '$_id.STATE'}}",
> > > +                            "{$group: {_id: '$STATE', CDC: {$sum:
> > {$cond: [ {$eq: ['CITY', null]}, 0, 1]}}}}",
> > > +                            "{$project: {STATE: '$_id', CDC:
> '$CDC'}}",
> > > +                            "{$sort: {CDC: -1}}",
> > > +                            "{$limit: 5}"));
> > > +  }
> > > +
> > > +  @Ignore("broken; [CALCITE-2115] is logged to fix it")
> > > +  @Test public void testProject() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, city, 0 as zero from zips order by
> > state, city")
> > > +            .limit(2)
> > > +            .returns("STATE=AK; CITY=AKHIOK; ZERO=0\n"
> > > +                    + "STATE=AK; CITY=AKIACHAK; ZERO=0\n")
> > > +            .queryContains(
> > > +                    mongoChecker(
> > > +                            "{$project: {CITY: '$city', STATE:
> > '$state'}}",
> > > +                            "{$sort: {STATE: 1, CITY: 1}}",
> > > +                            "{$project: {STATE: 1, CITY: 1, ZERO:
> > {$literal: 0}}}"));
> > > +  }
> > > +
> > > +  @Test public void testFilter() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, city from zips where state = 'CA'")
> > > +            .limit(2)
> > > +            .returns("STATE=CA; CITY=LOS ANGELES\n"
> > > +                    + "STATE=CA; CITY=BELL GARDENS\n")
> > > +            .explainContains("PLAN=MongoToEnumerableConverter\n"
> > > +                    + "  MongoProject(STATE=[CAST(ITEM($0,
> > 'state')):VARCHAR(2) CHARACTER SET \"ISO-8859-1\" COLLATE
> > \"ISO-8859-1$en_US$primary\"], CITY=[CAST(ITEM($0, 'city')):VARCHAR(20)
> > CHARACTER SET \"ISO-8859-1\" COLLATE \"ISO-8859-1$en_US$primary\"])\n"
> > > +                    + "    MongoFilter(condition=[=(CAST(ITEM($0,
> > 'state')):VARCHAR(2) CHARACTER SET \"ISO-8859-1\" COLLATE
> > \"ISO-8859-1$en_US$primary\", 'CA')])\n"
> > > +                    + "      MongoTableScan(table=[[mongo_raw,
> > zips]])");
> > > +  }
> > > +
> > > +  /** MongoDB's predicates are handed (they can only accept literals
> on
> > the
> > > +   * right-hand size) so it's worth testing that we handle them right
> > both
> > > +   * ways around. */
> > > +  @Test public void testFilterReversed() {
> > > +    assertModel(MODEL)
> > > +            .query("select state, city from zips where 'WI' < state")
> > > +            .limit(2)
> > > +            .returns("STATE=WV; CITY=BECKLEY\nSTATE=WV; CITY=ELM
> > GROVE\n");
> > > +
> > > +    assertModel(MODEL)
> > > +            .query("select state, city from zips where state > 'WI'")
> > > +            .limit(2)
> > > +            .returns("STATE=WV; CITY=BECKLEY\n"
> > > +                    + "STATE=WV; CITY=ELM GROVE\n");
> > > +  }
> > > +
> > > +  /** MongoDB's predicates are handed (they can only accept literals
> on
> > the
> > > +   * right-hand size) so it's worth testing that we handle them right
> > both
> > > +   * ways around.
> > >    *
> > > -   * @see <a href="https://issues.apache.org/jira/browse/CALCITE-2331
> > ">[CALCITE-2331]</a>
> > > -   */
> > > -  @Ignore("broken; [CALCITE-2331] is logged to fix it")
> > > -  @Test
> > > -  public void validateCALCITE2331() {
> > > -    zips.insertOne(new Document("CITY", "New York").append("STATE",
> > "NY"));
> > > -    zips.insertOne(new Document("CITY", "Washington").append("STATE",
> > "DC"));
> > > -
> > > -    CalciteAssert.that()
> > > -            .with(newConnectionFactory())
> > > -            .query("select cast(_MAP['CITY'] as varchar(20)) as
> > \"city\" from \"mongo\".\"zips\" "
> > > -                    + " where _MAP['STATE'] in ('DC', 'NY') and
> > _MAP['CITY'] = 'New York'")
> > > -            .returns("city=New York\n");
> > > +   * <p>Test case for
> > > +   * <a href="https://issues.apache.org/jira/browse/CALCITE-740
> > ">[CALCITE-740]
> > > +   * Redundant WHERE clause causes wrong result in MongoDB
> adapter</a>.
> > */
> > > +  @Test public void testFilterPair() {
> > > +    final int gt9k = 148;
> > > +    final int lt9k = 1;
> > > +    final int gt8k = 148;
> > > +    final int lt8k = 1;
> > > +    checkPredicate(gt9k, "where pop > 8000 and pop > 9000");
> > > +    checkPredicate(gt9k, "where pop > 9000");
> > > +    checkPredicate(lt9k, "where pop < 9000");
> > > +    checkPredicate(gt8k, "where pop > 8000");
> > > +    checkPredicate(lt8k, "where pop < 8000");
> > > +    checkPredicate(gt9k, "where pop > 9000 and pop > 8000");
> > > +    checkPredicate(gt8k, "where pop > 9000 or pop > 8000");
> > > +    checkPredicate(gt8k, "where pop > 8000 or pop > 9000");
> > > +    checkPredicate(lt8k, "where pop < 8000 and pop < 9000");
> > > +  }
> > > +
> > > +  private void checkPredicate(int expected, String q) {
> > > +    assertModel(MODEL)
> > > +            .query("select count(*) as c from zips\n"
> > > +                    + q)
> > > +            .returns("C=" + expected + "\n");
> > > +    assertModel(MODEL)
> > > +            .query("select * from zips\n"
> > > +                    + q)
> > > +            .returnsCount(expected);
> > > +  }
> > > +
> > > +  /** Test case for
> > > +   * <a href="https://issues.apache.org/jira/browse/CALCITE-286
> > ">[CALCITE-286]
> > > +   * Error casting MongoDB date</a>. */
> > > +  @Test public void testDate() {
> > > +    // Assumes that you have created the following collection before
> > running
> > > +    // this test:
> > > +    //
> > > +    // $ mongo
> > > +    // > use test
> > > +    // switched to db test
> > > +    // > db.createCollection("datatypes")
> > > +    // { "ok" : 1 }
> > > +    // > db.datatypes.insert( {
> > > +    //     "_id" : ObjectId("53655599e4b0c980df0a8c27"),
> > > +    //     "_class" : "com.ericblue.Test",
> > > +    //     "date" : ISODate("2012-09-05T07:00:00Z"),
> > > +    //     "value" : 1231,
> > > +    //     "ownerId" : "531e7789e4b0853ddb861313"
> > > +    //   } )
> > > +    assertModel("{\n"
> > > +            + "  version: '1.0',\n"
> > > +            + "  defaultSchema: 'test',\n"
> > > +            + "   schemas: [\n"
> > > +            + "     {\n"
> > > +            + "       type: 'custom',\n"
> > > +            + "       name: 'test',\n"
> > > +            + "       factory:
> > 'org.apache.calcite.adapter.mongodb.MongoSchemaFactory',\n"
> > > +            + "       operand: {\n"
> > > +            + "         host: 'localhost',\n"
> > > +            + "         database: 'test'\n"
> > > +            + "       }\n"
> > > +            + "     }\n"
> > > +            + "   ]\n"
> > > +            + "}")
> > > +            .query("select cast(_MAP['date'] as DATE) from
> > \"datatypes\"")
> > > +            .returnsUnordered("EXPR$0=2012-09-05");
> > > +  }
> > > +
> > > +  /** Test case for
> > > +   * <a href="https://issues.apache.org/jira/browse/CALCITE-665
> > ">[CALCITE-665]
> > > +   * ClassCastException in MongoDB adapter</a>. */
> > > +  @Test public void testCountViaInt() {
> > > +    assertModel(MODEL)
> > > +        .query("select count(*) from zips")
> > > +        .returns(
> > > +            new Function<ResultSet, Void>() {
> > > +              public Void apply(ResultSet input) {
> > > +                try {
> > > +                  Assert.assertThat(input.next(),
> > CoreMatchers.is(true));
> > > +                  Assert.assertThat(input.getInt(1),
> > CoreMatchers.is(ZIPS_SIZE));
> > > +                  return null;
> > > +                } catch (SQLException e) {
> > > +                  throw new RuntimeException(e);
> > > +                }
> > > +              }
> > > +            });
> > > +  }
> > > +
> > > +  /** Returns a function that checks that a particular MongoDB
> pipeline
> > is
> > > +   * generated to implement a query. */
> > > +  private static Function<List, Void> mongoChecker(final String...
> > strings) {
> > > +    return new Function<List, Void>() {
> > > +      public Void apply(List actual) {
> > > +        Object[] actualArray =
> > > +                actual == null || actual.isEmpty()
> > > +                        ? null
> > > +                        : ((List) actual.get(0)).toArray();
> > > +        CalciteAssert.assertArrayEqual("expected MongoDB query not
> > found",
> > > +                strings, actualArray);
> > > +        return null;
> > > +      }
> > > +    };
> > >   }
> > > }
> > >
> > >
> > >
> >
> http://git-wip-us.apache.org/repos/asf/calcite/blob/dcf396a5/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoDatabaseRule.java
> > > ----------------------------------------------------------------------
> > > diff --git
> >
> a/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoDatabaseRule.java
> >
> b/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoDatabaseRule.java
> > > new file mode 100644
> > > index 0000000..90bd759
> > > --- /dev/null
> > > +++
> >
> b/mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoDatabaseRule.java
> > > @@ -0,0 +1,83 @@
> > > +/*
> > > + * Licensed to the Apache Software Foundation (ASF) under one or more
> > > + * contributor license agreements.  See the NOTICE file distributed
> with
> > > + * this work for additional information regarding copyright ownership.
> > > + * The ASF licenses this file to you under the Apache License, Version
> > 2.0
> > > + * (the "License"); you may not use this file except in compliance
> with
> > > + * the License.  You may obtain a copy of the License at
> > > + *
> > > + * http://www.apache.org/licenses/LICENSE-2.0
> > > + *
> > > + * Unless required by applicable law or agreed to in writing, software
> > > + * distributed under the License is distributed on an "AS IS" BASIS,
> > > + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
> > implied.
> > > + * See the License for the specific language governing permissions and
> > > + * limitations under the License.
> > > + */
> > > +package org.apache.calcite.adapter.mongodb;
> > > +
> > > +import org.apache.calcite.test.MongoAssertions;
> > > +
> > > +import com.github.fakemongo.Fongo;
> > > +
> > > +import com.google.common.base.Preconditions;
> > > +
> > > +import com.mongodb.MongoClient;
> > > +import com.mongodb.client.MongoDatabase;
> > > +
> > > +import org.junit.rules.ExternalResource;
> > > +
> > > +/**
> > > + * Instantiates new connection to fongo (or mongo) database depending
> > on current profile
> > > + * (unit or integration tests).
> > > + *
> > > + * By default, this rule is executed as part of a unit test and
> > in-memory database
> > > + * <a href="https://github.com/fakemongo/fongo";>fongo</a> is used.
> > > + *
> > > + * <p>However, if maven profile is set to {@code IT} (eg. via command
> > line
> > > + * {@code $ mvn -Pit install}) this rule will connect to existing
> > (external)
> > > + * mongo instance ({@code localhost})</p>
> > > + *
> > > + */
> > > +class MongoDatabaseRule extends ExternalResource {
> > > +
> > > +  private static final String DB_NAME = "test";
> > > +
> > > +  private final MongoDatabase database;
> > > +  private final MongoClient client;
> > > +
> > > +  private MongoDatabaseRule(MongoClient client) {
> > > +    this.client = Preconditions.checkNotNull(client, "client");
> > > +    this.database = client.getDatabase(DB_NAME);
> > > +  }
> > > +
> > > +  /**
> > > +   * Create an instance based on current maven profile (as defined by
> > {@code -Pit}).
> > > +   */
> > > +  static MongoDatabaseRule create() {
> > > +    final MongoClient client;
> > > +    if (MongoAssertions.useMongo()) {
> > > +      // use to real client (connects to mongo)
> > > +      client = new MongoClient();
> > > +    } else if (MongoAssertions.useFongo()) {
> > > +      // in-memory DB (fake Mongo)
> > > +