ImageAssert_isEqualTo_Test.java

/*
 * Created on Jun 9, 2007
 * 
 * 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.
 * 
 * Copyright @2007-2013 the original author or authors.
 */
package org.fest.assertions;

import org.fest.test.ExpectedException;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;

import java.awt.image.BufferedImage;

import static java.awt.Color.BLUE;
import static java.awt.Color.YELLOW;
import static org.fest.assertions.Images.*;
import static org.fest.test.ExpectedException.none;

/**
 * Tests for {@link ImageAssert#isEqualTo(BufferedImage)}.
 *
 * @author Yvonne Wang
 * @author Alex Ruiz
 */
public class ImageAssert_isEqualTo_Test {
  @Rule
  public ExpectedException thrown = none();

  private static BufferedImage actual;

  @BeforeClass
  public static void setUpOnce() {
    actual = fivePixelBlueImage();
  }

  @Test
  public void should_pass_if_actual_and_expected_are_equal() {
    new ImageAssert(fivePixelBlueImage()).isEqualTo(fivePixelBlueImage());
  }

  @Test
  public void should_pass_if_both_actual_and_expected_are_null() {
    new ImageAssert(null).isEqualTo(null);
  }

  @Test
  public void should_fail_if_expected_is_null() {
    thrown.expect(AssertionError.class, String.format("expected:<null> but was:<%s>", actual));
    new ImageAssert(actual).isEqualTo(null);
  }

  @Test
  public void should_fail_and_display_description_if_expected_is_null() {
    thrown.expect(AssertionError.class, String.format("[A Test] expected:<null> but was:<%s>", actual));
    new ImageAssert(actual).as("A Test").isEqualTo(null);
  }

  @Test
  public void should_fail_if_width_is_not_equal() {
    thrown.expect(AssertionError.class, "image size: expected:<(w=3, h=5)> but was:<(w=5, h=5)>");
    BufferedImage expected = image(3, 5, BLUE);
    new ImageAssert(actual).isEqualTo(expected);
  }

  @Test
  public void should_fail_and_display_description_if_width_is_not_equal() {
    thrown.expect(AssertionError.class, "[A Test] image size: expected:<(w=3, h=5)> but was:<(w=5, h=5)>");
    BufferedImage expected = image(3, 5, BLUE);
    new ImageAssert(actual).as("A Test").isEqualTo(expected);
  }

  @Test
  public void should_fail_if_height_is_not_equal() {
    thrown.expect(AssertionError.class, "image size: expected:<(w=5, h=2)> but was:<(w=5, h=5)>");
    BufferedImage expected = image(5, 2, BLUE);
    new ImageAssert(actual).isEqualTo(expected);
  }

  @Test
  public void should_fail_and_display_description_if_height_is_not_equal() {
    thrown.expect(AssertionError.class, "[A Test] image size: expected:<(w=5, h=2)> but was:<(w=5, h=5)>");
    BufferedImage expected = image(5, 2, BLUE);
    new ImageAssert(actual).as("A Test").isEqualTo(expected);
  }

  @Test
  public void should_fail_if_color_is_not_equal() {
    thrown.expect(AssertionError.class, "expected:<color[r=0,g=0,b=255]> but was:<color[r=255,g=255,b=0]> at pixel [0,0]");
    new ImageAssert(actual).isEqualTo(fivePixelYellowImage());
  }

  @Test
  public void should_fail_and_display_description_if_color_is_not_equal() {
    thrown.expect(AssertionError.class,
        "[A Test] expected:<color[r=0,g=0,b=255]> but was:<color[r=255,g=255,b=0]> at pixel [0,0]");
    BufferedImage expected = image(5, 5, YELLOW);
    new ImageAssert(actual).as("A Test").isEqualTo(expected);
  }

  @Test
  public void should_fail_with_custom_message_if_width_is_not_equal() {
    thrown.expect(AssertionError.class, "My custom message");
    BufferedImage expected = image(3, 5, BLUE);
    new ImageAssert(actual).overridingErrorMessage("My custom message").isEqualTo(expected);
  }

  @Test
  public void should_fail_with_custom_message_ignoring_description_if_width_is_not_equal() {
    thrown.expect(AssertionError.class, "My custom message");
    BufferedImage expected = image(3, 5, BLUE);
    new ImageAssert(actual).as("A Test").overridingErrorMessage("My custom message").isEqualTo(expected);
  }

  @Test
  public void should_fail_with_custom_message_if_height_is_not_equal() {
    thrown.expect(AssertionError.class, "My custom message");
    BufferedImage expected = image(5, 2, BLUE);
    new ImageAssert(actual).overridingErrorMessage("My custom message").isEqualTo(expected);
  }

  @Test
  public void should_fail_with_custom_message_ignoring_description_if_height_is_not_equal() {
    thrown.expect(AssertionError.class, "My custom message");
    BufferedImage expected = image(5, 2, BLUE);
    new ImageAssert(actual).as("A Test").overridingErrorMessage("My custom message").isEqualTo(expected);
  }

  @Test
  public void should_fail_with_custom_message_if_color_is_not_equal() {
    thrown.expect(AssertionError.class, "My custom message");
    BufferedImage expected = image(5, 5, YELLOW);
    new ImageAssert(actual).overridingErrorMessage("My custom message").isEqualTo(expected);
  }

  @Test
  public void should_fail_with_custom_message_ignoring_description_if_color_is_not_equal() {
    thrown.expect(AssertionError.class, "My custom message");
    BufferedImage expected = image(5, 5, YELLOW);
    new ImageAssert(actual).as("A Test").overridingErrorMessage("My custom message").isEqualTo(expected);
  }
}