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Java example source code file (ProvisionExceptionTest.java)

This example Java source code file (ProvisionExceptionTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractmodule, annotation, caused, error, green, inject, injector, integer, override, provides, provisionexception, runtimeexception, string, unsupportedoperationexception, user

The ProvisionExceptionTest.java Java example source code

/**
 * 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;

import static com.google.inject.Asserts.assertContains;
import static com.google.inject.Asserts.getDeclaringSourcePart;
import static com.google.inject.Asserts.reserialize;
import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import com.google.common.base.Throwables;
import com.google.inject.spi.Message;

import junit.framework.TestCase;

import java.io.IOException;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * @author jessewilson@google.com (Jesse Wilson)
 */
@SuppressWarnings("UnusedDeclaration")
public class ProvisionExceptionTest extends TestCase {

  public void testExceptionsCollapsed() {
    try {
      Guice.createInjector().getInstance(A.class);
      fail(); 
    } catch (ProvisionException e) {
      assertTrue(e.getCause() instanceof UnsupportedOperationException);
      assertContains(
          e.getMessage(),
          "Error injecting constructor",
          "for the 1st parameter of com.google.inject.ProvisionExceptionTest$C.setD",
          "for field at com.google.inject.ProvisionExceptionTest$B.c",
          "for the 1st parameter of com.google.inject.ProvisionExceptionTest$A");
    }
  }

  /**
   * There's a pass-through of user code in the scope. We want exceptions thrown by Guice to be
   * limited to a single exception, even if it passes through user code.
   */
  public void testExceptionsCollapsedWithScopes() {
    try {
      Guice.createInjector(new AbstractModule() {
        @Override protected void configure() {
          bind(B.class).in(Scopes.SINGLETON);
        }
      }).getInstance(A.class);
      fail();
    } catch (ProvisionException e) {
      assertTrue(e.getCause() instanceof UnsupportedOperationException);
      assertFalse(e.getMessage().contains("custom provider"));
      assertContains(
          e.getMessage(),
          "Error injecting constructor",
          "for the 1st parameter of com.google.inject.ProvisionExceptionTest$C.setD",
          "for field at com.google.inject.ProvisionExceptionTest$B.c",
          "for the 1st parameter of com.google.inject.ProvisionExceptionTest$A");
    }
  }

  public void testMethodInjectionExceptions() {
    try {
      Guice.createInjector().getInstance(E.class);
      fail();
    } catch (ProvisionException e) {
      assertTrue(e.getCause() instanceof UnsupportedOperationException);
      assertContains(e.getMessage(), "Error injecting method",
          "at " + E.class.getName() + ".setObject(ProvisionExceptionTest.java:");
    }
  }

  public void testBindToProviderInstanceExceptions() {
    try {
      Guice.createInjector(new AbstractModule() {
        @Override protected void configure() {
          bind(D.class).toProvider(new DProvider());
        }
      }).getInstance(D.class);
      fail();
    } catch (ProvisionException e) {
      assertTrue(e.getCause() instanceof UnsupportedOperationException);
      assertContains(e.getMessage(),
          "1) Error in custom provider, java.lang.UnsupportedOperationException",
          "at " + ProvisionExceptionTest.class.getName(),
          getDeclaringSourcePart(getClass()));
    }
  }

  /**
   * This test demonstrates that if the user throws a ProvisionException, we wrap it to add context.
   */
  public void testProvisionExceptionsAreWrappedForBindToType() {
    try {
      Guice.createInjector().getInstance(F.class);
      fail();
    } catch (ProvisionException e) {
      assertContains(e.getMessage(), "1) User Exception",
          "at " + F.class.getName() + ".<init>(ProvisionExceptionTest.java:");
    }
  }

  public void testProvisionExceptionsAreWrappedForBindToProviderType() {
    try {
      Guice.createInjector(new AbstractModule() {
        @Override protected void configure() {
          bind(F.class).toProvider(FProvider.class);
        }
      }).getInstance(F.class);
      fail();
    } catch (ProvisionException e) {
      assertContains(e.getMessage(), "1) User Exception",
          "while locating ", FProvider.class.getName(),
          "while locating ", F.class.getName());
    }
  }

  public void testProvisionExceptionsAreWrappedForBindToProviderInstance() {
    try {
      Guice.createInjector(new AbstractModule() {
        @Override protected void configure() {
          bind(F.class).toProvider(new FProvider());
        }
      }).getInstance(F.class);
      fail();
    } catch (ProvisionException e) {
      assertContains(e.getMessage(), "1) User Exception",
          "at " + ProvisionExceptionTest.class.getName(),
          getDeclaringSourcePart(getClass()));
    }
  }

  public void testProvisionExceptionIsSerializable() throws IOException {
    try {
      Guice.createInjector().getInstance(A.class);
      fail();
    } catch (ProvisionException expected) {
      ProvisionException reserialized = reserialize(expected);
      assertContains(reserialized.getMessage(),
          "1) Error injecting constructor, java.lang.UnsupportedOperationException",
              "at com.google.inject.ProvisionExceptionTest$RealD.<init>()",
              "at Key[type=com.google.inject.ProvisionExceptionTest$RealD, annotation=[none]]",
              "@com.google.inject.ProvisionExceptionTest$C.setD()[0]",
              "at Key[type=com.google.inject.ProvisionExceptionTest$C, annotation=[none]]",
              "@com.google.inject.ProvisionExceptionTest$B.c",
              "at Key[type=com.google.inject.ProvisionExceptionTest$B, annotation=[none]]",
              "@com.google.inject.ProvisionExceptionTest$A.<init>()[0]",
              "at Key[type=com.google.inject.ProvisionExceptionTest$A, annotation=[none]]");
    }
  }

  public void testMultipleCauses() {
    try {
      Guice.createInjector().getInstance(G.class);
      fail();
    } catch (ProvisionException e) {
      assertContains(e.getMessage(),
          "1) Error injecting method, java.lang.IllegalArgumentException",
          "Caused by: java.lang.IllegalArgumentException: java.lang.UnsupportedOperationException",
          "Caused by: java.lang.UnsupportedOperationException: Unsupported",
          "2) Error injecting method, java.lang.NullPointerException: can't inject second either",
          "Caused by: java.lang.NullPointerException: can't inject second either",
          "2 errors");
    }
  }

  public void testInjectInnerClass() throws Exception {
    Injector injector = Guice.createInjector();
    try {
      injector.getInstance(InnerClass.class);
      fail();
    } catch (Exception expected) {
      assertContains(expected.getMessage(),
          "Injecting into inner classes is not supported.",
          "while locating " + InnerClass.class.getName());
    }
  }

  public void testInjectLocalClass() throws Exception {
    class LocalClass {}

    Injector injector = Guice.createInjector();
    try {
      injector.getInstance(LocalClass.class);
      fail();
    } catch (Exception expected) {
      assertContains(expected.getMessage(),
          "Injecting into inner classes is not supported.",
          "while locating " + LocalClass.class.getName());
    }
  }

  public void testBindingAnnotationsOnMethodsAndConstructors() {
    try {
      Injector injector = Guice.createInjector();
      injector.getInstance(MethodWithBindingAnnotation.class);
      fail();
    } catch (ConfigurationException expected) {
      assertContains(expected.getMessage(), MethodWithBindingAnnotation.class.getName()
          + ".injectMe() is annotated with @", Green.class.getName() + "(), ",
          "but binding annotations should be applied to its parameters instead.",
          "while locating " + MethodWithBindingAnnotation.class.getName());
    }

    try {
      Guice.createInjector().getInstance(ConstructorWithBindingAnnotation.class);
      fail();
    } catch (ConfigurationException expected) {
      assertContains(expected.getMessage(), ConstructorWithBindingAnnotation.class.getName()
          + ".<init>() is annotated with @", Green.class.getName() + "(), ",
          "but binding annotations should be applied to its parameters instead.",
          "at " + ConstructorWithBindingAnnotation.class.getName() + ".class",
          "while locating " + ConstructorWithBindingAnnotation.class.getName());
    }
  }

  public void testBindingAnnotationWarningForScala() {
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {
        bind(String.class).annotatedWith(Green.class).toInstance("lime!");
      }
    });
    injector.getInstance(LikeScala.class);
  }

  public void testLinkedBindings() {
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {
        bind(D.class).to(RealD.class);
      }
    });

    try {
      injector.getInstance(D.class);
      fail();
    } catch (ProvisionException expected) {
      assertContains(expected.getMessage(),
          "at " + RealD.class.getName() + ".<init>(ProvisionExceptionTest.java:",
          "while locating " + RealD.class.getName(),
          "while locating " + D.class.getName());
    }
  }

  public void testProviderKeyBindings() {
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {
        bind(D.class).toProvider(DProvider.class);
      }
    });

    try {
      injector.getInstance(D.class);
      fail();
    } catch (ProvisionException expected) {
      assertContains(expected.getMessage(),
          "while locating " + DProvider.class.getName(),
          "while locating " + D.class.getName());
    }
  }

  public void testDuplicateCausesCollapsed() {
    final RuntimeException sharedException = new RuntimeException("fail");
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {}

      @Provides Integer i() { throw sharedException; }

      @Provides Double d() { throw sharedException; }

    });

    try{
      injector.getInstance(DoubleFailure.class);
      fail();
    } catch (ProvisionException pe) {
      assertEquals(sharedException, pe.getCause());
      assertEquals(2, pe.getErrorMessages().size());
      for (Message message : pe.getErrorMessages()) {
        assertEquals(sharedException, message.getCause());
      }
    }
  }

  public void testMultipleDuplicates() {
    final RuntimeException exception1 = new RuntimeException("fail");
    final RuntimeException exception2 = new RuntimeException("abort");
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {}

      @Provides Integer i() { throw exception1; }

      @Provides Double d() { throw exception1; }

      @Provides String s() { throw exception2; }

      @Provides Number n() { throw exception2; }

    });

    try{
      injector.getInstance(QuadrupleFailure.class);
      fail();
    } catch (ProvisionException pe) {
      assertNull(pe.getCause());
      assertEquals(4, pe.getErrorMessages().size());

      String e1 = Throwables.getStackTraceAsString(exception1);
      String e2 = Throwables.getStackTraceAsString(exception2);
      assertContains(pe.getMessage(),
          "\n1) ", e1, "\n2) ", "(same stack trace as error #1)",
          "\n3) ", e2, "\n4) ", "(same stack trace as error #3)");
    }
  }

  static class DoubleFailure {
    @Inject DoubleFailure(Integer i, Double d) { }
  }

  static class QuadrupleFailure {
    @Inject QuadrupleFailure(Integer i, Double d, String s, Number n) { }
  }

  public void testDuplicatesDifferentInstances() {
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {}

      @Provides Integer i() { throw new RuntimeException(); }

    });

    try{
      injector.getInstance(DoubleSameFailure.class);
      fail();
    } catch (ProvisionException pe) {
      assertNotNull(pe.toString(), pe.getCause());
      assertEquals(2, pe.getErrorMessages().size());
      for (Message message : pe.getErrorMessages()) {
        assertNotNull(message.toString(), message.getCause());
      }
    }
  }

  public void testMultipleDuplicatesDifferentInstaces() {
    Injector injector = Guice.createInjector(new AbstractModule() {
      @Override protected void configure() {}

      @Provides Integer i() { throw new RuntimeException("fail"); }

      @Provides String s() { throw new RuntimeException("abort"); }

    });

    try{
      injector.getInstance(QuadrupleSameFailure.class);
      fail();
    } catch (ProvisionException pe) {
      assertNull(pe.getCause());
      assertEquals(4, pe.getErrorMessages().size());

      assertContains(pe.getMessage(),
          "\n1) ", "Caused by: java.lang.RuntimeException: fail",
          "\n2) ", "Caused by: java.lang.RuntimeException (same stack trace as error #1)",
          "\n3) ", "Caused by: java.lang.RuntimeException: abort",
          "\n4) ", "Caused by: java.lang.RuntimeException (same stack trace as error #3)");
    }
  }

  static class DoubleSameFailure {
    @Inject DoubleSameFailure(Integer i1, Integer i2) { }
  }

  static class QuadrupleSameFailure {
    @Inject QuadrupleSameFailure(Integer i1, Integer i2, String s1, String s2) { }
  }
  
  private class InnerClass {}

  static class A {
    @Inject
    A(B b) { }
  }
  static class B {
    @Inject C c;
  }
  static class C {
    @Inject
    void setD(RealD d) { }
  }
  static class E {
    @Inject void setObject(Object o) {
      throw new UnsupportedOperationException();
    }
  }

  static class MethodWithBindingAnnotation {
    @Inject @Green void injectMe(String greenString) {}
  }

  static class ConstructorWithBindingAnnotation {
    // Suppress compiler errors by the error-prone checker InjectedConstructorAnnotations,
    // which catches injected constructors with binding annotations.
    @SuppressWarnings("InjectedConstructorAnnotations")
    @Inject @Green ConstructorWithBindingAnnotation(String greenString) {}
  }

  /**
   * In Scala, fields automatically get accessor methods with the same name. So we don't do
   * misplaced-binding annotation detection if the offending method has a matching field.
   */
  static class LikeScala {
    @Inject @Green String green;
    @Inject @Green String green() { return green; }
  }

  @Retention(RUNTIME)
  @Target({ FIELD, PARAMETER, CONSTRUCTOR, METHOD })
  @BindingAnnotation
  @interface Green {}

  interface D {}

  static class RealD implements D {
    @Inject RealD() {
      throw new UnsupportedOperationException();
    }
  }

  static class DProvider implements Provider<D> {
    public D get() {
      throw new UnsupportedOperationException();
    }
  }

  static class F {
    @Inject public F() {
      throw new ProvisionException("User Exception", new RuntimeException());
    }
  }

  static class FProvider implements Provider<F> {
    public F get() {
      return new F();
    }
  }

  static class G {
    @Inject void injectFirst() {
      throw new IllegalArgumentException(new UnsupportedOperationException("Unsupported"));
    }
    @Inject void injectSecond() {
      throw new NullPointerException("can't inject second either");
    }
  }
}

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