Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2094#discussion_r84769097
--- Diff:
flink-core/src/test/java/org/apache/flink/api/java/typeutils/FieldAccessorTest.java
---
@@ -0,0 +1,343 @@
+/*
+ * 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.flink.api.java.typeutils;
+
+import static org.junit.Assert.*;
+
+import org.apache.flink.api.common.typeinfo.BasicArrayTypeInfo;
+import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
+import org.apache.flink.api.common.typeinfo.PrimitiveArrayTypeInfo;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.common.typeinfo.InvalidFieldReferenceException;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.api.java.tuple.Tuple3;
+import org.junit.Test;
+
+public class FieldAccessorTest {
+
+ // Note, that AggregationFunctionTest indirectly also tests
FieldAccessors.
+ // ProductFieldAccessor is tested in CaseClassTypeInfoTest.
+
+ @Test
+ public void testFlatTuple() {
+ Tuple2<String, Integer> t = Tuple2.of("aa", 5);
+ TupleTypeInfo<Tuple2<String, Integer>> tpeInfo =
+ (TupleTypeInfo<Tuple2<String, Integer>>)
TypeExtractor.getForObject(t);
+
+ FieldAccessor<Tuple2<String, Integer>, String> f0 =
tpeInfo.getFieldAccessor("f0", null);
+ assertEquals("aa", f0.get(t));
+ assertEquals("aa", t.f0);
+ t = f0.set(t, "b");
+ assertEquals("b", f0.get(t));
+ assertEquals("b", t.f0);
+
+ FieldAccessor<Tuple2<String, Integer>, Integer> f1 =
tpeInfo.getFieldAccessor("f1", null);
+ assertEquals(5, (int) f1.get(t));
+ assertEquals(5, (int) t.f1);
+ t = f1.set(t, 7);
+ assertEquals(7, (int) f1.get(t));
+ assertEquals(7, (int) t.f1);
+ assertEquals("b", f0.get(t));
+ assertEquals("b", t.f0);
+
+
+ FieldAccessor<Tuple2<String, Integer>, Integer> f1n =
tpeInfo.getFieldAccessor(1, null);
+ assertEquals(7, (int) f1n.get(t));
+ assertEquals(7, (int) t.f1);
+ t = f1n.set(t, 10);
+ assertEquals(10, (int) f1n.get(t));
+ assertEquals(10, (int) f1.get(t));
+ assertEquals(10, (int) t.f1);
+ assertEquals("b", f0.get(t));
+ assertEquals("b", t.f0);
+
+ FieldAccessor<Tuple2<String, Integer>, Integer> f1ns =
tpeInfo.getFieldAccessor("1", null);
+ assertEquals(10, (int) f1ns.get(t));
+ assertEquals(10, (int) t.f1);
+ t = f1ns.set(t, 11);
+ assertEquals(11, (int) f1ns.get(t));
+ assertEquals(11, (int) f1.get(t));
+ assertEquals(11, (int) t.f1);
+ assertEquals("b", f0.get(t));
+ assertEquals("b", t.f0);
+
+ // This is technically valid (the ".0" is selecting the 0th
field of a basic type).
+ FieldAccessor<Tuple2<String, Integer>, String> f0_0 =
tpeInfo.getFieldAccessor("f0.0", null);
+ assertEquals("b", f0_0.get(t));
+ assertEquals("b", t.f0);
+ t = f0_0.set(t, "cc");
+ assertEquals("cc", f0_0.get(t));
+ assertEquals("cc", t.f0);
+
+ try {
+ FieldAccessor<Tuple2<String, Integer>, String> bad =
tpeInfo.getFieldAccessor("almafa", null);
+ assertFalse("Expected exception, because of bad field
name", false);
+ } catch (InvalidFieldReferenceException ex) {
+ // OK
+ }
+ }
+
+ @Test
+ public void testTupleInTuple() {
+ Tuple2<String, Tuple3<Integer, Long, Double>> t =
Tuple2.of("aa", Tuple3.of(5, 9L, 2.0));
+ TupleTypeInfo<Tuple2<String, Tuple3<Integer, Long, Double>>>
tpeInfo =
+ (TupleTypeInfo<Tuple2<String, Tuple3<Integer,
Long, Double>>>)TypeExtractor.getForObject(t);
+
+ FieldAccessor<Tuple2<String, Tuple3<Integer, Long, Double>>,
String> f0 = tpeInfo.getFieldAccessor("f0", null);
+ assertEquals("aa", f0.get(t));
+ assertEquals("aa", t.f0);
+
+ FieldAccessor<Tuple2<String, Tuple3<Integer, Long, Double>>,
Double> f1f2 = tpeInfo.getFieldAccessor("f1.f2", null);
+ assertEquals(2.0, f1f2.get(t), 0);
+ assertEquals(2.0, t.f1.f2, 0);
+ t = f1f2.set(t, 3.0);
+ assertEquals(3.0, f1f2.get(t), 0);
+ assertEquals(3.0, t.f1.f2, 0);
+ assertEquals("aa", f0.get(t));
+ assertEquals("aa", t.f0);
+
+ FieldAccessor<Tuple2<String, Tuple3<Integer, Long, Double>>,
Tuple3<Integer, Long, Double>> f1 = tpeInfo.getFieldAccessor("f1", null);
+ assertEquals(Tuple3.of(5, 9L, 3.0), f1.get(t));
+ assertEquals(Tuple3.of(5, 9L, 3.0), t.f1);
+ t = f1.set(t, Tuple3.of(8, 12L, 4.0));
+ assertEquals(Tuple3.of(8, 12L, 4.0), f1.get(t));
+ assertEquals(Tuple3.of(8, 12L, 4.0), t.f1);
+ assertEquals("aa", f0.get(t));
+ assertEquals("aa", t.f0);
+
+ FieldAccessor<Tuple2<String, Tuple3<Integer, Long, Double>>,
Tuple3<Integer, Long, Double>> f1n = tpeInfo.getFieldAccessor(1, null);
+ assertEquals(Tuple3.of(8, 12L, 4.0), f1n.get(t));
+ assertEquals(Tuple3.of(8, 12L, 4.0), t.f1);
+ t = f1n.set(t, Tuple3.of(10, 13L, 5.0));
+ assertEquals(Tuple3.of(10, 13L, 5.0), f1n.get(t));
+ assertEquals(Tuple3.of(10, 13L, 5.0), f1.get(t));
+ assertEquals(Tuple3.of(10, 13L, 5.0), t.f1);
+ assertEquals("aa", f0.get(t));
+ assertEquals("aa", t.f0);
+ }
+
+ @Test
+ @SuppressWarnings("unchecked")
+ public void testTupleFieldAccessorOutOfBounds() {
+ try {
+ TupleTypeInfo.getBasicTupleTypeInfo(Integer.class,
Integer.class).getFieldAccessor(2, null);
+ fail();
+ } catch (InvalidFieldReferenceException e) {
+ // Nothing to do here
+ }
+ }
+
+ public static class Foo {
+ public int x;
+ public Tuple2<String, Long> t;
+ public Short y;
+
+ public Foo() {}
+
+ public Foo(int x, Tuple2<String, Long> t, Short y) {
+ this.x = x;
+ this.t = t;
+ this.y = y;
+ }
+ }
+
+ @Test
+ public void testTupleInPojoInTuple() {
+ Tuple2<String, Foo> t = Tuple2.of("aa", new Foo(8,
Tuple2.of("ddd", 9L), (short) 2));
+ TupleTypeInfo<Tuple2<String, Foo>> tpeInfo =
+ (TupleTypeInfo<Tuple2<String,
Foo>>)TypeExtractor.getForObject(t);
+
+ FieldAccessor<Tuple2<String, Foo>, Long> f1tf1 =
tpeInfo.getFieldAccessor("f1.t.f1", null);
+ assertEquals(9L, (long) f1tf1.get(t));
+ assertEquals(9L, (long) t.f1.t.f1);
+ t = f1tf1.set(t, 12L);
+ assertEquals(12L, (long) f1tf1.get(t));
+ assertEquals(12L, (long) t.f1.t.f1);
+
+ FieldAccessor<Tuple2<String, Foo>, String> f1tf0 =
tpeInfo.getFieldAccessor("f1.t.f0", null);
+ assertEquals("ddd", f1tf0.get(t));
+ assertEquals("ddd", t.f1.t.f0);
+ t = f1tf0.set(t, "alma");
+ assertEquals("alma", f1tf0.get(t));
+ assertEquals("alma", t.f1.t.f0);
+
+ FieldAccessor<Tuple2<String, Foo>, Foo> f1 =
tpeInfo.getFieldAccessor("f1", null);
+ FieldAccessor<Tuple2<String, Foo>, Foo> f1n =
tpeInfo.getFieldAccessor(1, null);
+ assertEquals(Tuple2.of("alma", 12L), f1.get(t).t);
+ assertEquals(Tuple2.of("alma", 12L), f1n.get(t).t);
+ assertEquals(Tuple2.of("alma", 12L), t.f1.t);
+ Foo newFoo = new Foo(8, Tuple2.of("ddd", 9L), (short) 2);
+ f1.set(t, newFoo);
+ assertEquals(newFoo, f1.get(t));
+ assertEquals(newFoo, f1n.get(t));
+ assertEquals(newFoo, t.f1);
+ }
+
+
+ public static class Inner {
+ public long x;
+ public boolean b;
+
+ public Inner(){}
+
+ public Inner(long x) {
+ this.x = x;
+ }
+
+ public Inner(long x, boolean b) {
+ this.x = x;
+ this.b = b;
+ }
+
+ @Override
+ public String toString() {
+ return ((Long)x).toString() + ", " + b;
+ }
+ }
+
+ public static class Outer {
+ public int a;
+ public Inner i;
+ public short b;
+
+ public Outer(){}
+
+ public Outer(int a, Inner i, short b) {
+ this.a = a;
+ this.i = i;
+ this.b = b;
+ }
+
+ @Override
+ public String toString() {
+ return a+", "+i.toString()+", "+b;
+ }
+ }
+
+ @Test
+ public void testPojoInPojo() {
--- End diff --
Is there a test that checks invalid field names for Pojos?
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