断言方法有很多，不过，可以很清楚地从其子面看出其功能。
常用的方法如下：
assertEquals(a, b)
Asserts that two primitive values are equal.
测试a是否等于b(a和b是原始类型数值(primitive value)或者必须为实现比较而具有equal方法)
assertFalse(a)
Asserts that a condition (a) is false.
测试a是否为false(假)，a是一个Boolean数值。
assertTrue(a)
Asserts that a condition is true.
测试a是否为true(真)，a是一个Boolean数值
assertNotNull(a)
Asserts that an object isn't null.
测试a是否非空，a是一个对象或者null。
assertNull(a)
Asserts that an object is null.
测试a是否为null，a是一个对象或者null。
assertNotSame(a, b)
Asserts that two objects do not refer to the same object.
测试a和b是否没有都引用同一个对象。
assertSame(a, b)
Asserts that two objects refer to the same object.
测试a和b是否都引用同一个对象。
常用的方法如下：
assertEquals(a, b)
Asserts that two primitive values are equal.
测试a是否等于b(a和b是原始类型数值(primitive value)或者必须为实现比较而具有equal方法)
assertFalse(a)
Asserts that a condition (a) is false.
测试a是否为false(假)，a是一个Boolean数值。
assertTrue(a)
Asserts that a condition is true.
测试a是否为true(真)，a是一个Boolean数值
assertNotNull(a)
Asserts that an object isn't null.
测试a是否非空，a是一个对象或者null。
assertNull(a)
Asserts that an object is null.
测试a是否为null，a是一个对象或者null。
assertNotSame(a, b)
Asserts that two objects do not refer to the same object.
测试a和b是否没有都引用同一个对象。
assertSame(a, b)
Asserts that two objects refer to the same object.
测试a和b是否都引用同一个对象。
