--- title: "Test cases - CoderPad Interview Docs" description: "Learn how to create test cases for Interview's take-home tests to automatically check the correctness of your candidates' code." canonical: "https://coderpad.io/resources/docs/interview/question-bank/test-cases/" last_modified: "2023-02-02 12:15:07" --- 1. [Docs home](https://coderpad.io/resources/docs/) / 2. [Interview](https://coderpad.io/resources/docs/interview/) / 3. [Interview question bank](https://coderpad.io/resources/docs/interview/question-bank/) / 4. [Test cases](https://coderpad.io/resources/docs/interview/question-bank/test-cases/) [Documentation menu](#docs-navigation) # Test cases Last updated on February 2, 2023 With take-home projects you have the ability to run test cases. Test cases allow you to test a candidate’s code against certain requirements. You will also be able to view the test cases’ pass/fail results once the candidate has finished their take-home project. You set them up during Step 2 – Add Take-Home Test Cases of [question creation/editing](https://coderpad.io/resources/docs/interview/question-bank/creating-a-question/). [![The "add take-home test cases" page. Here you have the option of adding input parameters and desired outputs for test cases.](https://coderpad.io/wp-content/uploads/2021/10/take-homes-1024x1007.png)](https://coderpad.io/wp-content/uploads/2021/10/take-homes.png) ## 1. Set up the function signature In order to run tests on the solution function, we must know how many parameters are enabled, what types they are, and what the expected return type of the function is. Parameters should be named and assigned a type using the dropdowns. You can add multiple parameters to a function by selecting the Add Parameter button, and repeating the steps to name the parameter and assign the type. [![The "add take home test cases page" showing the input parameters and an arrow pointing to the "add parameter" button.](https://coderpad.io/wp-content/uploads/2022/09/image-64-1024x240.png)](https://coderpad.io/wp-content/uploads/2022/09/image-64.png) If you want to remove a parameter, click the trashcan icon on the left-hand side of the parameter. [![The input parameters section, there are trashcans to the left of each parameter to remove them.](https://coderpad.io/wp-content/uploads/2021/10/test_case_item-1024x497.png)](https://coderpad.io/wp-content/uploads/2021/10/test_case_item.png) Finally, you can set the type of the function’s return value Supported types include: - Integer - String - Integer Array - String Array These types are consistent across all supported take-home project languages. These same types are enabled for both parameter types and return types. ## 2. Add the test case solutions Next you’ll add the inputs and expected outputs you expect to see from a candidate’s solution. There one test case solution will be automatically added for you to fill out, but you can easily add more by pressing the Add Test Case button. [![Test case solutions section with input parameter and required output for that parameter.](https://coderpad.io/wp-content/uploads/2022/09/image-65-1024x488.png)](https://coderpad.io/wp-content/uploads/2022/09/image-65.png) You’re able to remove test cases by selecting the trashcan-shaped delete button to the left-hand side of the test case you’d like to remove. Each test case also includes a toggle of whether to make it visible to the candidate or not. Non-visible test cases are not shown to candidates but are still tested against the candidate code and reported to the interviewer in playback mode. ## Candidate View When a candidate accesses a pad with take-home test cases, they’ll be able to see the visible tests within the Test Cases tab: [![A pad with candidate code on the left and the test cases tab open on the right.](https://coderpad.io/wp-content/uploads/2022/09/image-61-1024x232.png)](https://coderpad.io/wp-content/uploads/2022/09/image-61.png) They can run specific test-cases by checking the desired checkboxes and pressing Run selected test cases. Once ran, the Pass column on the right will update to indicate whether the test was successful or not. [![The results of the test cases. There is an arguments, expected result, and pass column value for each row/test case.](https://coderpad.io/wp-content/uploads/2022/09/image-62.png)](https://coderpad.io/wp-content/uploads/2022/09/image-62.png) You’re also able to see test output from the Program Output tab, along with the expected and actual results for each failed test. [![The output window is shown with both the output of the code as well as the results of the test cases.](https://coderpad.io/wp-content/uploads/2022/09/image-63-1024x500.png)](https://coderpad.io/wp-content/uploads/2022/09/image-63.png) Close Docs Index - [Screen](https://coderpad.io/resources/docs/screen/) Toggle children pages - [Quick start guides](https://coderpad.io/resources/docs/screen/recruiters-quickstart/) Toggle children pages - [Onboarding Checklist](https://coderpad.io/resources/docs/screen/recruiters-quickstart/screen-onboarding-checklist/) - [The CoderPad Screen Score Guide](https://coderpad.io/resources/docs/the-coderpad-screen-score-guide/) - [Video Guides](https://coderpad.io/resources/docs/screen/recruiters-quickstart/video-guides/) - [Tests](https://coderpad.io/resources/docs/screen/tests/) Toggle children pages - [Creating a test](https://coderpad.io/resources/docs/screen/tests/creating-a-test/) - [Customizing test content](https://coderpad.io/resources/docs/screen/tests/customizing-test-content/) - 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