Testcafe-hammerhead: Support the "headers" option of the "fetch" function wrapper provided as an array

[feikegeerts]

What is your Test Scenario?

The test scenario is doing an api call to validate a coupon. This api call can only be done by an authenticated user.

What is the Current behavior?

The coupon is not validated because the api call fails with an authentication error

What is the Expected behavior?

In testcafe 0.22.0 this api call works and correctly returns that the coupon code is invalid

What is your web application and your TestCafe test code?

The following code can be successfully run in testcafe 0.22.0 but fails in 0.23.3: https://gist.github.com/feikegeerts/4b6e28fdda55b3681df59f387d472b17

Steps to Reproduce:

Run the provided code with testcafe version 0.22.0 and see that the test runs successful.
Then run the provided code with the latest testcafe version and the test fails.

If you run the test with debug you will see that one of the invocations fails with the following error message:

Your Environment details:

• testcafe version: 0.23.3
• node.js version: v8.14.0
• command-line arguments: yarn run testcafe chrome test
• browser name and version: chrome 71
• platform and version: macOS 10.14.2

[Farfurix]

@feikegeerts,
Thank you for your detailed description. I've reproduced this issue.  It seems to be connected to the following commit: 

// [7177efe] Bump version (v0.23.3-alpha.2)
-    "testcafe-hammerhead": "14.4.2",
+    "testcafe-hammerhead": "14.4.4",

Our team will research it and check for a suitable solution.

[LavrovArtem]

Currently, our fetch function wrapper does not support the headers option provided as an array.
We will consider addressing this limitation in future sprints.

Fetch Standard:
https://fetch.spec.whatwg.org/#example-headers-class

var meta = [
  [ "Content-Type", "text/xml" ],
  [ "Breaking-Bad", "<3" ]
]

[lock[bot]]

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