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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.application;
import com.google.inject.AbstractModule;
import com.google.inject.ConfigurationException;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Module;
import com.google.inject.PrivateModule;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
import org.junit.jupiter.api.Test;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;
/**
* @author Simon Thoresen Hult
*/
public class GuiceRepositoryTestCase {
@Test
void requireThatInstallWorks() {
GuiceRepository guice = new GuiceRepository();
StringBinding module = new StringBinding("fooKey", "fooVal");
guice.install(module);
assertBinding(guice, "fooKey", "fooVal");
Iterator<Module> it = guice.iterator();
assertTrue(it.hasNext());
assertSame(module, it.next());
assertFalse(it.hasNext());
}
@Test
void requireThatInstallAllWorks() {
GuiceRepository guice = new GuiceRepository();
StringBinding foo = new StringBinding("fooKey", "fooVal");
StringBinding bar = new StringBinding("barKey", "barVal");
guice.installAll(Arrays.asList(foo, bar));
assertBinding(guice, "fooKey", "fooVal");
assertBinding(guice, "barKey", "barVal");
Iterator<Module> it = guice.iterator();
assertTrue(it.hasNext());
assertSame(foo, it.next());
assertTrue(it.hasNext());
assertSame(bar, it.next());
assertFalse(it.hasNext());
}
@Test
void requireThatUninstallWorks() {
GuiceRepository guice = new GuiceRepository();
StringBinding module = new StringBinding("fooKey", "fooVal");
guice.install(module);
assertBinding(guice, "fooKey", "fooVal");
guice.uninstall(module);
assertNoBinding(guice, "fooKey");
assertFalse(guice.iterator().hasNext());
}
@Test
void requireThatUninstallAllWorks() {
GuiceRepository guice = new GuiceRepository();
StringBinding foo = new StringBinding("fooKey", "fooVal");
StringBinding bar = new StringBinding("barKey", "barVal");
StringBinding baz = new StringBinding("bazKey", "bazVal");
guice.installAll(Arrays.asList(foo, bar, baz));
assertBinding(guice, "fooKey", "fooVal");
assertBinding(guice, "barKey", "barVal");
assertBinding(guice, "bazKey", "bazVal");
guice.uninstallAll(Arrays.asList(foo, baz));
assertNoBinding(guice, "fooKey");
assertBinding(guice, "barKey", "barVal");
assertNoBinding(guice, "bazKey");
Iterator<Module> it = guice.iterator();
assertNotNull(it);
assertTrue(it.hasNext());
assertSame(bar, it.next());
assertFalse(it.hasNext());
}
@Test
void requireThatBindingsCanBeOverridden() {
GuiceRepository guice = new GuiceRepository();
guice.install(new StringBinding("fooKey", "fooVal1"));
assertBinding(guice, "fooKey", "fooVal1");
guice.install(new StringBinding("fooKey", "fooVal2"));
assertBinding(guice, "fooKey", "fooVal2");
}
@Test
void requireThatModulesAreOnlyEvaluatedOnce() {
GuiceRepository guice = new GuiceRepository();
EvalCounter foo = new EvalCounter();
EvalCounter bar = new EvalCounter();
assertEquals(0, foo.cnt);
assertEquals(0, bar.cnt);
guice.install(foo);
assertEquals(1, foo.cnt);
assertEquals(0, bar.cnt);
guice.install(bar);
assertEquals(1, foo.cnt);
assertEquals(1, bar.cnt);
}
@Test
void requireThatPrivateModulesWorks() {
GuiceRepository guice = new GuiceRepository();
List<Named> names = Arrays.asList(Names.named("A"), Names.named("B"));
for (Named name : names) {
guice.install(createPrivateInjectNameModule(name));
}
Injector injector = guice.getInjector();
for (Named name : names) {
NameHolder nameHolder = injector.getInstance(Key.get(NameHolder.class, name));
assertEquals(name, nameHolder.name);
}
}
private Module createPrivateInjectNameModule(final Named name) {
return new PrivateModule() {
@Override
protected void configure() {
bind(NameHolder.class).annotatedWith(name).to(NameHolder.class);
expose(NameHolder.class).annotatedWith(name);
bind(Named.class).toInstance(name);
}
};
}
private static void assertBinding(GuiceRepository guice, String name, String expected) {
assertEquals(expected, guice.getInjector().getInstance(Key.get(String.class, Names.named(name))));
}
private static void assertNoBinding(GuiceRepository guice, String name) {
try {
guice.getInjector().getInstance(Key.get(String.class, Names.named(name)));
fail();
} catch (ConfigurationException e) {
}
}
private static class EvalCounter extends AbstractModule {
int cnt = 0;
@Override
protected void configure() {
++cnt;
}
}
private static class StringBinding extends AbstractModule {
final String name;
final String val;
StringBinding(String name, String val) {
this.name = name;
this.val = val;
}
@Override
protected void configure() {
bind(String.class).annotatedWith(Names.named(name)).toInstance(val);
}
}
public static final class NameHolder {
public final Named name;
@Inject
public NameHolder(Named name) {
this.name = name;
}
}
}
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