Tests support

Machina also supports test code, which can be run parallel to machine and can test behaviour of each parts. You have access to same storage, and you can also use fetch, in case of fetch http://localhost will request machine itself. All test cases have to be wrapped by it function like in this example: Always wrap your cases to it function!

Functions in test code:

assert(condition: boolean)
it(caseName: string, async () => void)

Context in Tests vs HTTP Callbacks

In HTTP callbacks, you receive context through the req.context parameter:

async function uploadFile(req: ProcessedRequest) {
  await fetch(req.context, 'https://api.example.com/upload', { ... });
}

In test code, you use the machineContext variable directly:

it('Test upload', async () => {
  const result = await fetch(machineContext, 'http://localhost/uploadFile', { ... });
});

The machineContext is automatically available in test environment and provides the same functionality as req.context in HTTP callbacks.

Test code examples:

it('Setting', async () => {
  const result = await fetch(machineContext, 'http://localhost/testRequest', {
      method: 'post',
      headers: {
          'content-type': 'application/json'
      },
      body: JSON.stringify({
          text: 'Hello world'
      })
  })
  assert(result.status === 200)
})