guava/guava-tests/test/com/google/common/base/VerifyTest.java

/*
 * Copyright (C) 2013 The Guava Authors
 *
 * 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.common.base;

import static com.google.common.base.Verify.verify;
import static com.google.common.base.Verify.verifyNotNull;

import com.google.common.annotations.GwtCompatible;

import junit.framework.AssertionFailedError;
import junit.framework.TestCase;

/**
 * Unit test for {@link com.google.common.base.Verify}.
 */
@GwtCompatible
public class VerifyTest extends TestCase {
  public void testVerify_simple_success() {
    verify(true);
  }

  public void testVerify_simple_failure() {
    try {
      verify(false);
      fail();
    } catch (VerifyException expected) {
    }
  }

  public void testVerify_simpleMessage_success() {
    verify(true, "message");
  }

  public void testVerify_simpleMessage_failure() {
    try {
      verify(false, "message");
      fail();
    } catch (VerifyException expected) {
      assertEquals("message", expected.getMessage());
    }
  }

  public void testVerify_complexMessage_success() {
    verify(true, "%s", IGNORE_ME);
  }

  public void testVerify_complexMessage_failure() {
    try {
      verify(false, FORMAT, 5);
      fail();
    } catch (VerifyException expected) {
      checkMessage(expected);
    }
  }

  private static final String NON_NULL_STRING = "foo";

  public void testVerifyNotNull_simple_success() {
    String result = verifyNotNull(NON_NULL_STRING);
    assertSame(NON_NULL_STRING, result);
  }

  public void testVerifyNotNull_simple_failure() {
    try {
      verifyNotNull(null);
      fail();
    } catch (VerifyException expected) {
    }
  }

  public void testVerifyNotNull_complexMessage_success() {
    String result = verifyNotNull(NON_NULL_STRING, "%s", IGNORE_ME);
    assertSame(NON_NULL_STRING, result);
  }

  public void testVerifyNotNull_simpleMessage_failure() {
    try {
      verifyNotNull(null, FORMAT, 5);
      fail();
    } catch (VerifyException expected) {
      checkMessage(expected);
    }
  }

  private static final Object IGNORE_ME = new Object() {
    @Override public String toString() {
      throw new AssertionFailedError();
    }
  };

  private static final String FORMAT = "I ate %s pies.";

  private static void checkMessage(Exception e) {
    assertEquals("I ate 5 pies.", e.getMessage());
  }
}