flink-library-siddhi/src/test/java/org/apache/flink/streaming/siddhi/schema/StreamSchemaTest.java

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 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
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 * distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.flink.streaming.siddhi.schema;

import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.common.typeinfo.Types;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.api.java.tuple.Tuple4;
import org.apache.flink.api.java.typeutils.PojoTypeInfo;
import org.apache.flink.api.java.typeutils.TypeExtractor;
import org.apache.flink.streaming.siddhi.source.Event;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class StreamSchemaTest {
    @Test
    public void testStreamSchemaWithPojo() {
        TypeInformation<Event> typeInfo = TypeExtractor.createTypeInfo(Event.class);
        assertTrue("Type information should be PojoTypeInfo", typeInfo instanceof PojoTypeInfo);
        StreamSchema<Event> schema = new StreamSchema<>(typeInfo, "id", "timestamp", "name", "price");
        assertEquals(4, schema.getFieldIndexes().length);
        assertEquals(Event.class, schema.getTypeInfo().getTypeClass());
    }

    @Test
    public void testStreamSchemaWithTuple() {
        TypeInformation<Tuple4<Integer,Long,String,Double>> typeInfo = Types.TUPLE(Types.INT, Types.LONG, Types.STRING, Types.DOUBLE);
        StreamSchema<Tuple4<Integer,Long,String,Double>> schema = new StreamSchema<>(typeInfo, "id", "timestamp", "name", "price");
        assertEquals(Tuple4.class, schema.getTypeInfo().getTypeClass());
        assertEquals(4, schema.getFieldIndexes().length);
        assertEquals(Tuple4.class, schema.getTypeInfo().getTypeClass());
    }

    @Test
    public void testStreamSchemaWithPrimitive() {
        TypeInformation<String> typeInfo = Types.STRING;
        StreamSchema<String> schema = new StreamSchema<>(typeInfo, "words");
        assertEquals(String.class, schema.getTypeInfo().getTypeClass());
        assertEquals(1, schema.getFieldIndexes().length);
        assertEquals(String.class, schema.getTypeInfo().getTypeClass());
    }

    @Test(expected = IllegalArgumentException.class)
    public void testStreamSchemaWithPojoAndUnknownField() {
        TypeInformation<Event> typeInfo = TypeExtractor.createTypeInfo(Event.class);
        new StreamSchema<>(typeInfo, "id", "timestamp", "name", "price", "unknown");
    }

    @Test
    public void testStreamTupleSerializerWithPojo() {
        TypeInformation<Event> typeInfo = TypeInformation.of(Event.class);
        assertTrue("Type information should be PojoTypeInfo", typeInfo instanceof PojoTypeInfo);
        StreamSchema<Event> schema = new StreamSchema<>(typeInfo, "id", "timestamp", "name", "price");
        assertEquals(Event.class, schema.getTypeInfo().getTypeClass());

        TypeInformation<Tuple2<String, Event>> tuple2TypeInformation = Types.TUPLE(Types.STRING, Types.GENERIC(schema.getTypeInfo().getTypeClass()));
        assertEquals("Java Tuple2<String, GenericType<" + Event.class.getName() + ">>", tuple2TypeInformation.toString());
    }

    @Test
    public void testStreamTupleSerializerWithTuple() {
        TypeInformation<Tuple4> typeInfo = Types.GENERIC(Tuple4.class);
        StreamSchema<Tuple4> schema = new StreamSchema<>(typeInfo, "id", "timestamp", "name", "price");
        assertEquals(Tuple4.class, schema.getTypeInfo().getTypeClass());
        TypeInformation<Tuple2<String, Tuple4>> tuple2TypeInformation = Types.TUPLE(Types.STRING, schema.getTypeInfo());
        assertEquals("Java Tuple2<String, GenericType<" + Tuple4.class.getName() + ">>", tuple2TypeInformation.toString());
    }

    @Test
    public void testStreamTupleSerializerWithPrimitive() {
        TypeInformation<String> typeInfo = Types.STRING;
        StreamSchema<String> schema = new StreamSchema<>(typeInfo, "words");
        assertEquals(String.class, schema.getTypeInfo().getTypeClass());
        TypeInformation<Tuple2<String, String>> tuple2TypeInformation = Types.TUPLE(Types.STRING, schema.getTypeInfo());
        assertEquals("Java Tuple2<String, String>", tuple2TypeInformation.toString());
    }
}