send parameters from test suite to test case in junit 4

Question

I've got four junit cases and I need to pass them a parameter, that is the same for all of them, but this parameter is created in a dynamic way in the test suite. How can I pass a parameter from the test suite to all the tests in the test case?

Kaffir

Answer 1

If its just a string parameter, you can set the System Property and access it in test cases.

If you want to programmatically do it, you can do it at one place System.setProperty("x","123"); otherwise you can always pass System properties from command line as -Dx=123.

Smoothen

Thanks for you reply, but can you explain that, i mean if i have this class @RunWith(Suite.class) @SuiteClasses({ TestAddTag.class }) public class AllTests { } How pass to the test TestAddTag a string parameter? – Kaffir

Can you try this in the static initializer? @RunWith(Suite.class) @SuiteClasses({ TestAddTag.class }) public class AllTests { static {System.setProperty("x","123");} } can then do System.getProperty("x") in your test case. – Smoothen

the static block didn't take effect, so I went with: coderanch.com/t/534637/Testing/… – Cortico

@Cortico did you get that to work with junit 4 tests cases? – Disparagement

this answer (https://mcmap.net/q/162729/-before-and-after-suite-execution-hook-in-junit-4-x) worked for me, but required a suite class for each option. – Disparagement

Answer 2

Instead of use system property, try to use a static class, store a class with all info that you want in memory.

Lactate

Answer 3

Try parameterized tests. It is a built-in JUnit feature designed to pass parameters to all tests inside a test case. See below link for examples:

https://github.com/junit-team/junit4/wiki/Parameterized-tests

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