java - 比较 java.awt.Color 对象时，JUnit Test 似乎无法正常工作

Question

使用这段代码:

@Test
public void testBallSize() {
    Ball b = new Ball(1f,1f,0.5f,0.5f, Color.WHITE);
    assertEquals("Color of the ball should be white.", Color.WHITE, b.getColor());

}

制作:

   java.lang.AssertionError: Color of the ball should be white. expected: java.awt.Color<java.awt.Color[r=255,g=255,b=255]> but was: java.awt.Color<java.awt.Color[r=255,g=255,b=255]>
            at org.junit.Assert.fail(Assert.java:88)
            at org.junit.Assert.failNotEquals(Assert.java:834)
            at org.junit.Assert.assertEquals(Assert.java:118)
            at BallTest.testBallSize(BallTest.java:18)
            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
            at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
            at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
            at java.lang.reflect.Method.invoke(Unknown Source)
            at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
            at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
            at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
            at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
            at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
            at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
            at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
            at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
            at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
            at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
            at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
            at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
            at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
            at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
            at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
            at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
            at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
            at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
            at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
            at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

颜色看起来是一样的。我做错了什么？

Answer 1

也许两种颜色的 alpha 值不同？

根据the docs :

The result is true if and only if the argument is not null and is a Color object that has the same red, green, blue, and alpha values as this object.