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package com.google.inject.errors;
import static com.google.inject.errors.ErrorMessageTestUtils.assertGuiceErrorEqualsIgnoreLineNumber;
import static org.junit.Assert.assertThrows;
import static org.junit.Assume.assumeTrue;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;
import com.google.inject.Provides;
import com.google.inject.ProvisionException;
import com.google.inject.internal.InternalFlags;
import com.google.inject.internal.InternalFlags.IncludeStackTraceOption;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Field;
import javax.inject.Inject;
import javax.inject.Qualifier;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public final class NullInjectedIntoNonNullableTest {
@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@interface Bar {}
static class Foo {
@Inject
Foo(@Bar String string) {}
}
static class FromProvidesMethodModule extends AbstractModule {
@Provides
@Bar
String provideString() {
return null;
}
}
static class FromProviderModule extends AbstractModule {
@Override
protected void configure() {
bind(String.class).annotatedWith(Bar.class).toProvider(() -> null);
}
}
static class IntermediateModule extends AbstractModule {
public static final String NULL = null;
private static final Module MODULE =
new AbstractModule() {
@Override
protected void configure() {
Field field = null;
try {
field = IntermediateModule.class.getField("NULL");
} catch (NoSuchFieldException error) {
throw new AssertionError("NULL field missing!");
}
binder()
.withSource(field)
.bind(String.class)
.annotatedWith(Bar.class)
.toProvider(() -> NULL);
}
};
@Override
protected void configure() {
install(MODULE);
}
}
@Before
public void ensureStackTraceIsIncluded() {
assumeTrue(InternalFlags.getIncludeStackTraceOption() != IncludeStackTraceOption.OFF);
}
@Test
public void nullReturnedFromProvidesMethod() {
Injector injector = Guice.createInjector(new FromProvidesMethodModule());
ProvisionException exception =
assertThrows(ProvisionException.class, () -> injector.getInstance(Foo.class));
assertGuiceErrorEqualsIgnoreLineNumber(
exception.getMessage(), "null_returned_from_provides_method.txt");
}
@Test
public void nullReturnedFromProvider() {
Injector injector = Guice.createInjector(new FromProviderModule());
ProvisionException exception =
assertThrows(ProvisionException.class, () -> injector.getInstance(Foo.class));
assertGuiceErrorEqualsIgnoreLineNumber(
exception.getMessage(), "null_returned_from_provider.txt");
}
@Test
public void nullReturnedFromProviderWithModuleStack() {
Injector injector = Guice.createInjector(new IntermediateModule());
ProvisionException exception =
assertThrows(ProvisionException.class, () -> injector.getInstance(Foo.class));
assertGuiceErrorEqualsIgnoreLineNumber(
exception.getMessage(), "null_returned_from_provider_with_module_stack.txt");
}
}
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