ThrowingProviderTest.java

/*
 * Copyright (C) 2007 Google Inc.
 *
 * Licensed 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 com.google.inject.throwingproviders;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.inject.AbstractModule;
import com.google.inject.BindingAnnotation;
import com.google.inject.CreationException;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.TypeLiteral;
import com.google.inject.internal.util.Classes;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
import com.google.inject.spi.Dependency;
import com.google.inject.spi.HasDependencies;
import com.google.inject.spi.Message;
import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.rmi.AccessException;
import java.rmi.RemoteException;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.TooManyListenersException;
import junit.framework.TestCase;

/**
 * @author jmourits@google.com (Jerome Mourits)
 * @author jessewilson@google.com (Jesse Wilson)
 */
@SuppressWarnings("deprecation")
public class ThrowingProviderTest extends TestCase {
  @Target(METHOD)
  @Retention(RUNTIME)
  @BindingAnnotation
  @interface NotExceptionScoping {};

  private final TypeLiteral<RemoteProvider<String>> remoteProviderOfString =
      new TypeLiteral<RemoteProvider<String>>() {};
  private final MockRemoteProvider<String> mockRemoteProvider = new MockRemoteProvider<String>();
  private final TestScope testScope = new TestScope();
  private Injector bindInjector =
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              ThrowingProviderBinder.create(binder())
                  .bind(RemoteProvider.class, String.class)
                  .to(mockRemoteProvider)
                  .in(testScope);

              ThrowingProviderBinder.create(binder())
                  .bind(RemoteProvider.class, String.class)
                  .annotatedWith(NotExceptionScoping.class)
                  .scopeExceptions(false)
                  .to(mockRemoteProvider)
                  .in(testScope);
            }
          });
  private Injector providesInjector =
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
              bindScope(TestScope.Scoped.class, testScope);
            }

            @SuppressWarnings("unused")
            @CheckedProvides(RemoteProvider.class)
            @TestScope.Scoped
            String throwOrGet() throws RemoteException {
              return mockRemoteProvider.get();
            }

            @SuppressWarnings("unused")
            @CheckedProvides(value = RemoteProvider.class, scopeExceptions = false)
            @NotExceptionScoping
            @TestScope.Scoped
            String notExceptionScopingThrowOrGet() throws RemoteException {
              return mockRemoteProvider.get();
            }
          });

  public void testExceptionsThrown_Bind() {
    tExceptionsThrown(bindInjector);
  }

  public void testExceptionsThrown_Provides() {
    tExceptionsThrown(providesInjector);
  }

  private void tExceptionsThrown(Injector injector) {
    RemoteProvider<String> remoteProvider = injector.getInstance(Key.get(remoteProviderOfString));

    mockRemoteProvider.throwOnNextGet("kaboom!");
    try {
      remoteProvider.get();
      fail();
    } catch (RemoteException expected) {
      assertEquals("kaboom!", expected.getMessage());
    }
  }

  public void testValuesScoped_Bind() throws RemoteException {
    tValuesScoped(bindInjector, null);
  }

  public void testValuesScoped_Provides() throws RemoteException {
    tValuesScoped(providesInjector, null);
  }

  public void testValuesScopedWhenNotExceptionScoping_Bind() throws RemoteException {
    tValuesScoped(bindInjector, NotExceptionScoping.class);
  }

  public void testValuesScopedWhenNotExceptionScoping_Provides() throws RemoteException {
    tValuesScoped(providesInjector, NotExceptionScoping.class);
  }

  private void tValuesScoped(Injector injector, Class<? extends Annotation> annotation)
      throws RemoteException {
    Key<RemoteProvider<String>> key =
        annotation != null
            ? Key.get(remoteProviderOfString, annotation)
            : Key.get(remoteProviderOfString);
    RemoteProvider<String> remoteProvider = injector.getInstance(key);

    mockRemoteProvider.setNextToReturn("A");
    assertEquals("A", remoteProvider.get());

    mockRemoteProvider.setNextToReturn("B");
    assertEquals("A", remoteProvider.get());

    testScope.beginNewScope();
    assertEquals("B", remoteProvider.get());
  }

  public void testExceptionsScoped_Bind() {
    tExceptionsScoped(bindInjector);
  }

  public void testExceptionsScoped_Provides() {
    tExceptionsScoped(providesInjector);
  }

  private void tExceptionsScoped(Injector injector) {
    RemoteProvider<String> remoteProvider = injector.getInstance(Key.get(remoteProviderOfString));

    mockRemoteProvider.throwOnNextGet("A");
    try {
      remoteProvider.get();
      fail();
    } catch (RemoteException expected) {
      assertEquals("A", expected.getMessage());
    }

    mockRemoteProvider.throwOnNextGet("B");
    try {
      remoteProvider.get();
      fail();
    } catch (RemoteException expected) {
      assertEquals("A", expected.getMessage());
    }
  }

  public void testExceptionsNotScopedWhenNotExceptionScoping_Bind() {
    tExceptionsNotScopedWhenNotExceptionScoping(bindInjector);
  }

  public void testExceptionsNotScopedWhenNotExceptionScoping_Provides() {
    tExceptionsNotScopedWhenNotExceptionScoping(providesInjector);
  }

  private void tExceptionsNotScopedWhenNotExceptionScoping(Injector injector) {
    RemoteProvider<String> remoteProvider =
        injector.getInstance(Key.get(remoteProviderOfString, NotExceptionScoping.class));

    mockRemoteProvider.throwOnNextGet("A");
    try {
      remoteProvider.get();
      fail();
    } catch (RemoteException expected) {
      assertEquals("A", expected.getMessage());
    }

    mockRemoteProvider.throwOnNextGet("B");
    try {
      remoteProvider.get();
      fail();
    } catch (RemoteException expected) {
      assertEquals("B", expected.getMessage());
    }
  }

  public void testAnnotations_Bind() throws RemoteException {
    final MockRemoteProvider<String> mockRemoteProviderA = new MockRemoteProvider<String>();
    final MockRemoteProvider<String> mockRemoteProviderB = new MockRemoteProvider<String>();
    bindInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                ThrowingProviderBinder.create(binder())
                    .bind(RemoteProvider.class, String.class)
                    .annotatedWith(Names.named("a"))
                    .to(mockRemoteProviderA);

                ThrowingProviderBinder.create(binder())
                    .bind(RemoteProvider.class, String.class)
                    .to(mockRemoteProviderB);
              }
            });
    tAnnotations(bindInjector, mockRemoteProviderA, mockRemoteProviderB);
  }

  public void testAnnotations_Provides() throws RemoteException {
    final MockRemoteProvider<String> mockRemoteProviderA = new MockRemoteProvider<String>();
    final MockRemoteProvider<String> mockRemoteProviderB = new MockRemoteProvider<String>();
    providesInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                install(ThrowingProviderBinder.forModule(this));
              }

              @SuppressWarnings("unused")
              @CheckedProvides(RemoteProvider.class)
              @Named("a")
              String throwOrGet() throws RemoteException {
                return mockRemoteProviderA.get();
              }

              @SuppressWarnings("unused")
              @CheckedProvides(RemoteProvider.class)
              String throwOrGet2() throws RemoteException {
                return mockRemoteProviderB.get();
              }
            });
    tAnnotations(providesInjector, mockRemoteProviderA, mockRemoteProviderB);
  }

  private void tAnnotations(
      Injector injector, MockRemoteProvider<String> mockA, MockRemoteProvider<String> mockB)
      throws RemoteException {
    mockA.setNextToReturn("A");
    mockB.setNextToReturn("B");
    assertEquals(
        "A", injector.getInstance(Key.get(remoteProviderOfString, Names.named("a"))).get());

    assertEquals("B", injector.getInstance(Key.get(remoteProviderOfString)).get());
  }

  public void testUndeclaredExceptions_Bind() throws RemoteException {
    tUndeclaredExceptions(bindInjector);
  }

  public void testUndeclaredExceptions_Provides() throws RemoteException {
    tUndeclaredExceptions(providesInjector);
  }

  private void tUndeclaredExceptions(Injector injector) throws RemoteException {
    RemoteProvider<String> remoteProvider = injector.getInstance(Key.get(remoteProviderOfString));
    mockRemoteProvider.throwOnNextGet(new IndexOutOfBoundsException("A"));
    try {
      remoteProvider.get();
      fail();
    } catch (RuntimeException e) {
      assertEquals("A", e.getCause().getMessage());
    }

    // undeclared exceptions shouldn't be scoped
    mockRemoteProvider.throwOnNextGet(new IndexOutOfBoundsException("B"));
    try {
      remoteProvider.get();
      fail();
    } catch (RuntimeException e) {
      assertEquals("B", e.getCause().getMessage());
    }
  }

  public void testThrowingProviderSubclassing() throws RemoteException {
    final SubMockRemoteProvider aProvider = new SubMockRemoteProvider();
    aProvider.setNextToReturn("A");

    bindInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                ThrowingProviderBinder.create(binder())
                    .bind(RemoteProvider.class, String.class)
                    .to(aProvider);
              }
            });

    assertEquals("A", bindInjector.getInstance(Key.get(remoteProviderOfString)).get());
  }

  static class SubMockRemoteProvider extends MockRemoteProvider<String> {}

  public void testBindingToNonInterfaceType_Bind() throws RemoteException {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              ThrowingProviderBinder.create(binder())
                  .bind(MockRemoteProvider.class, String.class)
                  .to(mockRemoteProvider);
            }
          });
      fail();
    } catch (CreationException expected) {
      assertEquals(
          MockRemoteProvider.class.getName() + " must be an interface",
          Iterables.getOnlyElement(expected.getErrorMessages()).getMessage());
    }
  }

  public void testBindingToNonInterfaceType_Provides() throws RemoteException {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(MockRemoteProvider.class)
            String foo() {
              return null;
            }
          });
      fail();
    } catch (CreationException expected) {
      assertEquals(
          MockRemoteProvider.class.getName() + " must be an interface",
          Iterables.getOnlyElement(expected.getErrorMessages()).getMessage());
    }
  }

  public void testBindingToSubSubInterface_Bind() throws RemoteException {
    try {
      bindInjector =
          Guice.createInjector(
              new AbstractModule() {
                @Override
                protected void configure() {
                  ThrowingProviderBinder.create(binder())
                      .bind(SubRemoteProvider.class, String.class);
                }
              });
      fail();
    } catch (CreationException expected) {
      assertEquals(
          SubRemoteProvider.class.getName()
              + " must extend CheckedProvider (and only CheckedProvider)",
          Iterables.getOnlyElement(expected.getErrorMessages()).getMessage());
    }
  }

  public void testBindingToSubSubInterface_Provides() throws RemoteException {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(SubRemoteProvider.class)
            String foo() {
              return null;
            }
          });
      fail();
    } catch (CreationException expected) {
      assertEquals(
          SubRemoteProvider.class.getName()
              + " must extend CheckedProvider (and only CheckedProvider)",
          Iterables.getOnlyElement(expected.getErrorMessages()).getMessage());
    }
  }

  interface SubRemoteProvider extends RemoteProvider<String> {}

  public void testBindingToInterfaceWithExtraMethod_Bind() throws RemoteException {
    try {
      bindInjector =
          Guice.createInjector(
              new AbstractModule() {
                @Override
                protected void configure() {
                  ThrowingProviderBinder.create(binder())
                      .bind(RemoteProviderWithExtraMethod.class, String.class);
                }
              });
      fail();
    } catch (CreationException expected) {
      assertEquals(
          RemoteProviderWithExtraMethod.class.getName()
              + " may not declare any new methods, but declared "
              + RemoteProviderWithExtraMethod.class.getDeclaredMethods()[0].toGenericString(),
          Iterables.getOnlyElement(expected.getErrorMessages()).getMessage());
    }
  }

  public void testBindingToInterfaceWithExtraMethod_Provides() throws RemoteException {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(RemoteProviderWithExtraMethod.class)
            String foo() {
              return null;
            }
          });
      fail();
    } catch (CreationException expected) {
      assertEquals(
          RemoteProviderWithExtraMethod.class.getName()
              + " may not declare any new methods, but declared "
              + RemoteProviderWithExtraMethod.class.getDeclaredMethods()[0].toGenericString(),
          Iterables.getOnlyElement(expected.getErrorMessages()).getMessage());
    }
  }

  public void testDependencies_Bind() {
    bindInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                bind(String.class).toInstance("Foo");
                bind(Integer.class).toInstance(5);
                bind(Double.class).toInstance(5d);
                bind(Long.class).toInstance(5L);
                ThrowingProviderBinder.create(binder())
                    .bind(RemoteProvider.class, String.class)
                    .to(DependentRemoteProvider.class);
              }
            });

    HasDependencies hasDependencies =
        (HasDependencies) bindInjector.getBinding(Key.get(remoteProviderOfString));
    hasDependencies =
        (HasDependencies)
            bindInjector.getBinding(
                Iterables.getOnlyElement(hasDependencies.getDependencies()).getKey());
    // Make sure that that is dependent on DependentRemoteProvider.
    assertEquals(
        Dependency.get(Key.get(DependentRemoteProvider.class)),
        Iterables.getOnlyElement(hasDependencies.getDependencies()));
    // And make sure DependentRemoteProvider has the proper dependencies.
    hasDependencies = (HasDependencies) bindInjector.getBinding(DependentRemoteProvider.class);
    Set<Key<?>> dependencyKeys =
        ImmutableSet.copyOf(
            Iterables.transform(
                hasDependencies.getDependencies(),
                new Function<Dependency<?>, Key<?>>() {
                  @Override
                  public Key<?> apply(Dependency<?> from) {
                    return from.getKey();
                  }
                }));
    assertEquals(
        ImmutableSet.<Key<?>>of(
            Key.get(String.class),
            Key.get(Integer.class),
            Key.get(Long.class),
            Key.get(Double.class)),
        dependencyKeys);
  }

  public void testDependencies_Provides() {
    providesInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                bind(String.class).toInstance("Foo");
                bind(Integer.class).toInstance(5);
                bind(Double.class).toInstance(5d);
                bind(Long.class).toInstance(5L);
                install(ThrowingProviderBinder.forModule(this));
              }

              @SuppressWarnings("unused")
              @CheckedProvides(RemoteProvider.class)
              String foo(String s, Integer i, Double d, Long l) {
                return null;
              }
            });

    HasDependencies hasDependencies =
        (HasDependencies) providesInjector.getBinding(Key.get(remoteProviderOfString));
    // RemoteProvider<String> is dependent on the provider method..
    hasDependencies =
        (HasDependencies)
            providesInjector.getBinding(
                Iterables.getOnlyElement(hasDependencies.getDependencies()).getKey());
    // And the provider method has our real dependencies..
    hasDependencies =
        (HasDependencies)
            providesInjector.getBinding(
                Iterables.getOnlyElement(hasDependencies.getDependencies()).getKey());
    Set<Key<?>> dependencyKeys =
        ImmutableSet.copyOf(
            Iterables.transform(
                hasDependencies.getDependencies(),
                new Function<Dependency<?>, Key<?>>() {
                  @Override
                  public Key<?> apply(Dependency<?> from) {
                    return from.getKey();
                  }
                }));
    assertEquals(
        ImmutableSet.<Key<?>>of(
            Key.get(String.class),
            Key.get(Integer.class),
            Key.get(Long.class),
            Key.get(Double.class)),
        dependencyKeys);
  }

  interface RemoteProviderWithExtraMethod<T> extends ThrowingProvider<T, RemoteException> {
    T get(T defaultValue) throws RemoteException;
  }

  interface RemoteProvider<T> extends ThrowingProvider<T, RemoteException> {}

  static class DependentRemoteProvider<T> implements RemoteProvider<T> {
    @Inject double foo;

    @Inject
    public DependentRemoteProvider(String foo, int bar) {}

    @Inject
    void initialize(long foo) {}

    @Override
    public T get() throws RemoteException {
      return null;
    }
  }

  static class MockRemoteProvider<T> implements RemoteProvider<T> {
    Exception nextToThrow;
    T nextToReturn;

    public void throwOnNextGet(String message) {
      throwOnNextGet(new RemoteException(message));
    }

    public void throwOnNextGet(Exception nextToThrow) {
      this.nextToThrow = nextToThrow;
    }

    public void setNextToReturn(T nextToReturn) {
      this.nextToReturn = nextToReturn;
    }

    @Override
    public T get() throws RemoteException {
      if (nextToThrow instanceof RemoteException) {
        throw (RemoteException) nextToThrow;
      } else if (nextToThrow instanceof RuntimeException) {
        throw (RuntimeException) nextToThrow;
      } else if (nextToThrow == null) {
        return nextToReturn;
      } else {
        throw new AssertionError("nextToThrow must be a runtime or remote exception");
      }
    }
  }

  public void testBindingToInterfaceWithBoundValueType_Bind() throws RemoteException {
    bindInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                ThrowingProviderBinder.create(binder())
                    .bind(StringRemoteProvider.class, String.class)
                    .to(
                        new StringRemoteProvider() {
                          @Override
                          public String get() throws RemoteException {
                            return "A";
                          }
                        });
              }
            });

    assertEquals("A", bindInjector.getInstance(StringRemoteProvider.class).get());
  }

  public void testBindingToInterfaceWithBoundValueType_Provides() throws RemoteException {
    providesInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                install(ThrowingProviderBinder.forModule(this));
              }

              @SuppressWarnings("unused")
              @CheckedProvides(StringRemoteProvider.class)
              String foo() throws RemoteException {
                return "A";
              }
            });

    assertEquals("A", providesInjector.getInstance(StringRemoteProvider.class).get());
  }

  interface StringRemoteProvider extends ThrowingProvider<String, RemoteException> {}

  public void testBindingToInterfaceWithGeneric_Bind() throws RemoteException {
    bindInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                ThrowingProviderBinder.create(binder())
                    .bind(RemoteProvider.class, new TypeLiteral<List<String>>() {}.getType())
                    .to(
                        new RemoteProvider<List<String>>() {
                          @Override
                          public List<String> get() throws RemoteException {
                            return Arrays.asList("A", "B");
                          }
                        });
              }
            });

    Key<RemoteProvider<List<String>>> key =
        Key.get(new TypeLiteral<RemoteProvider<List<String>>>() {});
    assertEquals(Arrays.asList("A", "B"), bindInjector.getInstance(key).get());
  }

  public void testBindingToInterfaceWithGeneric_Provides() throws RemoteException {
    providesInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                install(ThrowingProviderBinder.forModule(this));
              }

              @SuppressWarnings("unused")
              @CheckedProvides(RemoteProvider.class)
              List<String> foo() throws RemoteException {
                return Arrays.asList("A", "B");
              }
            });

    Key<RemoteProvider<List<String>>> key =
        Key.get(new TypeLiteral<RemoteProvider<List<String>>>() {});
    assertEquals(Arrays.asList("A", "B"), providesInjector.getInstance(key).get());
  }

  public void testProviderMethodWithWrongException() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(RemoteProvider.class)
            String foo() throws InterruptedException {
              return null;
            }
          });
      fail();
    } catch (CreationException ce) {
      assertEquals(
          InterruptedException.class.getName()
              + " is not compatible with the exceptions (["
              + RemoteException.class
              + "]) declared in the CheckedProvider interface ("
              + RemoteProvider.class.getName()
              + ")",
          Iterables.getOnlyElement(ce.getErrorMessages()).getMessage());
    }
  }

  public void testProviderMethodWithSubclassOfExceptionIsOk() {
    providesInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                install(ThrowingProviderBinder.forModule(this));
              }

              @SuppressWarnings("unused")
              @CheckedProvides(RemoteProvider.class)
              String foo() throws AccessException {
                throw new AccessException("boo!");
              }
            });

    RemoteProvider<String> remoteProvider =
        providesInjector.getInstance(Key.get(remoteProviderOfString));

    try {
      remoteProvider.get();
      fail();
    } catch (RemoteException expected) {
      assertTrue(expected instanceof AccessException);
      assertEquals("boo!", expected.getMessage());
    }
  }

  public void testProviderMethodWithSuperclassFails() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(RemoteProvider.class)
            String foo() throws IOException {
              return null;
            }
          });
      fail();
    } catch (CreationException ce) {
      assertEquals(
          IOException.class.getName()
              + " is not compatible with the exceptions (["
              + RemoteException.class
              + "]) declared in the CheckedProvider interface ("
              + RemoteProvider.class.getName()
              + ")",
          Iterables.getOnlyElement(ce.getErrorMessages()).getMessage());
    }
  }

  public void testProviderMethodWithRuntimeExceptionsIsOk() throws RemoteException {
    providesInjector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                install(ThrowingProviderBinder.forModule(this));
              }

              @SuppressWarnings("unused")
              @CheckedProvides(RemoteProvider.class)
              String foo() throws RuntimeException {
                throw new RuntimeException("boo!");
              }
            });

    RemoteProvider<String> remoteProvider =
        providesInjector.getInstance(Key.get(remoteProviderOfString));

    try {
      remoteProvider.get();
      fail();
    } catch (RuntimeException expected) {
      assertEquals("boo!", expected.getCause().getMessage());
    }
  }

  public void testProviderMethodWithManyExceptions() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(RemoteProvider.class)
            String foo()
                throws InterruptedException, RuntimeException, RemoteException, AccessException,
                    TooManyListenersException {
              return null;
            }
          });
      fail();
    } catch (CreationException ce) {
      // The only two that should fail are Interrupted & TooManyListeners.. the rest are OK.
      List<Message> errors = ImmutableList.copyOf(ce.getErrorMessages());
      assertEquals(
          InterruptedException.class.getName()
              + " is not compatible with the exceptions (["
              + RemoteException.class
              + "]) declared in the CheckedProvider interface ("
              + RemoteProvider.class.getName()
              + ")",
          errors.get(0).getMessage());
      assertEquals(
          TooManyListenersException.class.getName()
              + " is not compatible with the exceptions (["
              + RemoteException.class
              + "]) declared in the CheckedProvider interface ("
              + RemoteProvider.class.getName()
              + ")",
          errors.get(1).getMessage());
      assertEquals(2, errors.size());
    }
  }

  public void testMoreTypeParameters() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(TooManyTypeParameters.class)
            String foo() {
              return null;
            }
          });
      fail();
    } catch (CreationException ce) {
      assertEquals(
          TooManyTypeParameters.class.getName()
              + " has more than one generic type parameter: [T, P]",
          Iterables.getOnlyElement(ce.getErrorMessages()).getMessage());
    }
  }

  public void testWrongThrowingProviderType() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(WrongThrowingProviderType.class)
            String foo() {
              return null;
            }
          });
      fail();
    } catch (CreationException ce) {
      assertEquals(
          WrongThrowingProviderType.class.getName()
              + " does not properly extend CheckedProvider, the first type parameter of CheckedProvider "
              + "(java.lang.String) is not a generic type",
          Iterables.getOnlyElement(ce.getErrorMessages()).getMessage());
    }
  }

  public void testOneMethodThatIsntGet() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(OneNoneGetMethod.class)
            String foo() {
              return null;
            }
          });
      fail();
    } catch (CreationException ce) {
      assertEquals(
          OneNoneGetMethod.class.getName()
              + " may not declare any new methods, but declared "
              + Classes.toString(OneNoneGetMethod.class.getDeclaredMethods()[0]),
          Iterables.getOnlyElement(ce.getErrorMessages()).getMessage());
    }
  }

  public void testManyMethods() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(ManyMethods.class)
            String foo() {
              return null;
            }
          });
      fail();
    } catch (CreationException ce) {
      assertEquals(
          ManyMethods.class.getName()
              + " may not declare any new methods, but declared "
              + Arrays.asList(ManyMethods.class.getDeclaredMethods()),
          Iterables.getOnlyElement(ce.getErrorMessages()).getMessage());
    }
  }

  public void testIncorrectPredefinedType_Bind() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              ThrowingProviderBinder.create(binder())
                  .bind(StringRemoteProvider.class, Integer.class)
                  .to(
                      new StringRemoteProvider() {
                        @Override
                        public String get() throws RemoteException {
                          return "A";
                        }
                      });
            }
          });
      fail();
    } catch (CreationException ce) {
      assertEquals(
          StringRemoteProvider.class.getName()
              + " expects the value type to be java.lang.String, but it was java.lang.Integer",
          Iterables.getOnlyElement(ce.getErrorMessages()).getMessage());
    }
  }

  public void testIncorrectPredefinedType_Provides() {
    try {
      Guice.createInjector(
          new AbstractModule() {
            @Override
            protected void configure() {
              install(ThrowingProviderBinder.forModule(this));
            }

            @SuppressWarnings("unused")
            @CheckedProvides(StringRemoteProvider.class)
            Integer foo() {
              return null;
            }
          });
      fail();
    } catch (CreationException ce) {
      assertEquals(
          StringRemoteProvider.class.getName()
              + " expects the value type to be java.lang.String, but it was java.lang.Integer",
          Iterables.getOnlyElement(ce.getErrorMessages()).getMessage());
    }
  }

  private static interface TooManyTypeParameters<T, P> extends ThrowingProvider<T, Exception> {}

  private static interface WrongThrowingProviderType<T>
      extends ThrowingProvider<String, Exception> {}

  private static interface OneNoneGetMethod<T> extends ThrowingProvider<T, Exception> {
    T bar();
  }

  private static interface ManyMethods<T> extends ThrowingProvider<T, Exception> {
    T bar();

    String baz();
  }
}