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This is a pretty dumb question but my first time with unit testing so: lets say I have an object variable like obj and I want my unit test to Fail if this obj is Null. so for assertions, should I say AssertNull or AssertNotNull ? I get confused how they are named.
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Assertions. assertNull() checks that object is null. In case, object is not null, it will through AssertError. public static void assertNull(Object actual) public static void assertNull(Object actual, String message)
The explanation is here – assertEquals() uses equals() method to validate if the two objects are equal whereas assertSame() uses the operator == to validate if two objects are equal. Both of these approaches vary; hence the results are different as well.
assertTrue is used to verify if a given Boolean condition is true. This assertion returns true if the specified condition passes, if not, then an assertion error is thrown.
NotNull(Object, String)Verifies that the object that is passed in is not equal to null If the object is null then an AssertionException is thrown.
Use assertNotNull(obj). assert means must be.
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The assertNotNull() method means "a passed parameter must not be null": if it is null then the test case fails.
The assertNull() method means "a passed parameter must be null": if it is not null then the test case fails.
String str1 = null; String str2 = "hello"; // Success. assertNotNull(str2); // Fail. assertNotNull(str1); // Success. assertNull(str1); // Fail. assertNull(str2); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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