src/android/tests/src/com/google/android/inputmethod/japanese/testing/InstrumentationMockUtil.java

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package org.mozc.android.inputmethod.japanese.testing;

import android.app.Dialog;
import android.app.Instrumentation;
import android.content.Context;
import android.view.View;

import org.easymock.EasyMockSupport;
import org.easymock.IMockBuilder;

/**
 * Utilities shared by the implementation of TestCase classes with mock.
 *
 * Unfortunately, there is no ways to do "mix-in" style implementation in Java, and we need to
 * inherit appropriate test class, such as InstrumentationTestCase/ActivityInstrumentationTestCase2
 * or so. Instead, we have shared implementation in this class, and invoke the methods from
 * inheriting classes as proxy.
 *
 */
class InstrumentationMockUtil {
  private Instrumentation instrumentation;
  private EasyMockSupport mockSupport;

  InstrumentationMockUtil(Instrumentation instrumentation, EasyMockSupport mockSupport) {
    this.instrumentation = instrumentation;
    this.mockSupport = mockSupport;
  }

  <T extends View> T createViewMock(Class<T> toMock) {
    return createViewMockBuilder(toMock).createMock();
  }

  <T extends View> IMockBuilder<T> createViewMockBuilder(Class<T> toMock) {
    return createMockBuilderWithContext(toMock);
  }

  <T extends Dialog> T createDialogMock(Class<T> toMock) {
    return createDialogMockBuilder(toMock).createMock();
  }

  <T extends Dialog> IMockBuilder<T> createDialogMockBuilder(Class<T> toMock) {
    return createMockBuilderWithContext(toMock);
  }

  private <T> IMockBuilder<T> createMockBuilderWithContext(Class<T> toMock) {
    return mockSupport.createMockBuilder(toMock)
        .withConstructor(Context.class)
        .withArgs(instrumentation.getTargetContext());
  }
}