Testing with Parameterized TestCases
Parameterized TestCases
Parameterized tests can help keep your test suite organized by allowing you to define multiple test scenarios with different inputs using a single test function. You can define the required test parameters on the TestCase and use them in your test function to generate various test cases. This is especially useful when you have similar test setups with different inputs.
-
To define a TestCase with parameters, you need to add input parameters and a test data set with the name test_parameters. This TestCase will be executed multiple times with the test data provided by the test_parameters parameter.
Here’s an example:func test_parameterized_int_values(a: int, b :int, c :int, expected :int, test_parameters := [ [1, 2, 3, 6], [3, 4, 5, 12], [6, 7, 8, 21] ]): assert_that(a+b+c).is_equal(expected) -
To define a TestCase with parameters, you can use the attribute [TestCase] and provide it with a test data set for each parameter set. This allows the TestCase to be executed multiple times, once for each set of test data provided by the attributes.
For example:[TestCase(1, 2, 3, 6)] [TestCase(3, 4, 5, 12)] [TestCase(6, 7, 8, 21)] public void TestCaseArguments(int a, int b, int c, int expect) { AssertThat(a + b + c).IsEqual(expect); }The TestName parameter can be used to give each parameterized test case a custom name. This is especially useful when multiple test cases are being run with different sets of data, as it allows for easy identification of which test case(s) failed.
Here’s an example:[TestCase(1, 2, 3, 6, TestName = "TestCaseA")] [TestCase(3, 4, 5, 12, TestName = "TestCaseB")] [TestCase(6, 7, 8, 21, TestName = "TestCaseC")] public void TestCasesWithCustomTestName(int a, double b, int c, int expect) { AssertThat(a + b + c).IsEqual(expect); }
Advice