Tech-Notes

• @Test
• @DisplayName(“we can change method name”)
• @Disabled - obmit this method
• @RepeatedTest(n) - test execute n times
• @Tag(tag1, tag2) - will use execute test functions based on tag exist

AssertEqual functions:

1. assertEquals(expected, actual);
2. assertArrayEquals(expectedArray, actualArray);
3. assertIterableEquals(expectedArray, actualArray);
4. assertTrue(boolean condition)
5. void assertFalse(boolean condition)
6. void assertNotNull(Object object)
7. void assertNull(Object object)
8. void assertSame(object1, object2)
9. void assertNotSame(object1, object2)

#handle exception assertThrows(ArithmeticException.class, ()->className.functionName, “test message to display”);

Test Lifecycle:

• @Before - executed before each test
• @BeforeClass - execute it only once before running all tests. should be static
• @BeforeEach and @BeforeAll are the JUnit 5 equivalents of @Before and @BeforeClass

Test instance:

• @TestInstance(TestInstance.Lifecycle.PER_CLASS) - Object is same for whole class
• @TestInstance(TestInstance.Lifecycle.PER_METHOD) - each function each object will get created

Conditional Execution:

• @EnabledOnOs({OS.LINUX, OS.WINDOWS})
• @DisabledOnOs(OS.WINDOWS)
• @EnabledOnJre(JRE.JAVA_9)
• @EnabledIfSystemProperty(named = “java.vm.name”, matches = “.OpenJDK.”)
• @EnabledIfEnvironmentVariable(named = “PROCESSOR_IDENTIFIER”, matches = “.Intel64 Family 6.”)

AssertAll:

assertAll( ()->assertEqual(expected,actual),()->assertEqual(expected,actual)); #testcase inside testcase NOte: put @Nested before a nested class, to acheive nested testcase