1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* 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.commons.lang3.function;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.commons.lang3.exception.CustomUncheckedException;
import org.junit.jupiter.api.Test;
/**
* Tests {@link MethodInvokers#asFunction(Method)}.
*/
public class MethodInvokersFunctionTest extends MethodFixtures {
@Test
public void testApply0Arg() throws NoSuchMethodException, SecurityException {
final Function<MethodFixtures, String> func = MethodInvokers.asFunction(getMethodForGetString());
assertEquals(INSTANCE.getString(), func.apply(INSTANCE));
}
@Test
public void testApply0ArgThrowsUnchecked() throws NoSuchMethodException, SecurityException {
final Function<MethodFixtures, String> func = MethodInvokers.asFunction(getMethodForGetStringThrowsUnchecked());
assertThrows(CustomUncheckedException.class, () -> func.apply(INSTANCE));
}
@Test
public void testBuildVarArg() throws SecurityException, NoSuchMethodException {
MethodInvokers.asFunction(getMethodForGetStringVarStringArgs());
}
@Test
public void testConstructorForNull() throws SecurityException {
assertThrows(NullPointerException.class, () -> MethodInvokers.asFunction(null));
}
@Test
public void testFindAndInvoke() throws SecurityException {
// Finding
final List<Function<Object, Object>> invokers = Stream.of(MethodFixtures.class.getDeclaredMethods())
.filter(m -> m.isAnnotationPresent(AnnotationTestFixture.class)).map(MethodInvokers::asFunction).collect(Collectors.toList());
assertEquals(2, invokers.size());
// ...
// Invoking
final Set<Object> set1 = invokers.stream().map(i -> i.apply(MethodFixtures.INSTANCE)).collect(Collectors.toSet());
assertEquals(new HashSet<>(Arrays.asList(INSTANCE.getString(), INSTANCE.getString2())), set1);
final Set<Object> set2 = Stream.of(INSTANCE).map(invokers.get(0)).collect(Collectors.toSet());
final Set<Object> set3 = Stream.of(INSTANCE).map(invokers.get(1)).collect(Collectors.toSet());
set2.addAll(set3);
assertEquals(new HashSet<>(Arrays.asList(INSTANCE.getString(), INSTANCE.getString2())), set2);
}
@Test
public void testFullExample() throws SecurityException, ReflectiveOperationException {
final Method method = String.class.getMethod("length");
final Function<String, Integer> function = MethodInvokers.asFunction(method);
assertEquals(3, function.apply("ABC"));
}
@Test
public void testMapComputeIfAbsent() throws NoSuchMethodException, SecurityException {
final Map<MethodFixtures, String> map = new HashMap<>();
map.computeIfAbsent(INSTANCE, MethodInvokers.asFunction(getMethodForGetString()));
assertEquals(INSTANCE.getString(), map.get(INSTANCE));
}
@Test
public void testToString() throws SecurityException, ReflectiveOperationException {
// Should not blow up and must return _something_
assertFalse(MethodInvokers.asFunction(getMethodForGetString()).toString().isEmpty());
}
}
|
