blob: e1dc415de6d008e65a843346a050ca0bb15626a2 (
plain) (
blame)
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
102
103
104
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package demo;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
import com.yahoo.component.AbstractComponent;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertNotNull;
/**
* @author tonytv
* @author gjoranv
*/
@SuppressWarnings("unused")
public class FallbackToGuiceInjectorTest extends Base {
public static class MyComponent extends AbstractComponent {
private final String url;
private final Executor executor;
@Inject
public MyComponent(@Named("url") String url, Executor executor) {
this.url = url;
this.executor = executor;
}
public MyComponent() {
throw new RuntimeException("Constructor annotated with @Inject is preferred.");
}
}
public static class ComponentTakingDefaultString{
private final String injectedString;
public ComponentTakingDefaultString(String empty_string_created_by_guice) {
this.injectedString = empty_string_created_by_guice;
}
}
public static class ComponentThatCannotBeConstructed {
public ComponentThatCannotBeConstructed(Integer cannot_be_injected_because_Integer_has_no_default_ctor) { }
}
@Rule
public final ExpectedException exception = ExpectedException.none();
@Test
public void guice_injector_is_used_when_no_global_component_exists() {
setInjector(
Guice.createInjector(new AbstractModule() {
@Override
protected void configure() {
bind(Executor.class).toInstance(Executors.newSingleThreadExecutor());
bind(String.class).annotatedWith(Names.named("url")).toInstance("http://yahoo.com");
}
}));
register(MyComponent.class);
complete();
MyComponent component = getInstance(MyComponent.class);
assertThat(component.url, is("http://yahoo.com"));
assertNotNull(component.executor);
}
@Test
public void guice_injector_creates_a_new_instance_with_default_ctor_when_no_explicit_binding_exists() {
setInjector(emptyGuiceInjector());
register(ComponentTakingDefaultString.class);
complete();
ComponentTakingDefaultString component = getInstance(ComponentTakingDefaultString.class);
assertThat(component.injectedString, is(""));
}
@Test
public void guice_injector_fails_when_no_explicit_binding_exists_and_class_has_no_default_ctor() {
setInjector(emptyGuiceInjector());
register(ComponentThatCannotBeConstructed.class);
exception.expect(RuntimeException.class);
exception.expectMessage("When resolving dependencies of 'demo.FallbackToGuiceInjectorTest$ComponentThatCannotBeConstructed'");
complete();
}
private Injector emptyGuiceInjector() {
return Guice.createInjector(new AbstractModule() {
@Override
protected void configure() {
}
});
}
}
|
