Write IML tests

When using IML functions, that work with date and time, remember to set the correct timezone in extension settings. The accepted format is the international timezone format.

For example "Europe/Prague"

Write a test

It's possible to write tests for your custom IML functions. You can use it function and asserts as you may already know them from Mocha and other testing frameworks. Our example function has the following code:

Code

function exampleFunction(number) {
       return number * 2
       }

Occurence in VS Code

Example function

So, let's write a test for this function. We'll create two blocks.

Code

it('First test', () => {
    assert.ok(exampleFunction(2) === 4)
    })
it('Second test', () => {
    assert.ok(exampleFunction(2) === 5)
    })

Occurence in VS Code

Example test with 2 blocks

As you can see, the it function accepts exactly two parameters, the name of the test and the code to run. In this code, we can verify expected outputs using assert.ok() function.

Run a test

To run a test on a specific function, right-click the function name in the tree and select the Run IML test option.

Run IML test option

The test will start and you'll see the output in the IML tests output channel.

Output from the IML test

If you need to debug your custom IML function, follow the article below.

Debug IML in VS Code