converted history jasmine test to jest

[NARUDESIGNS]

@jywarren I've been able to convert history_spec.js jasmine file to jest but with two exceptions. These exceptions occurred because the expect blocks were put in a loop and so the expected result was inconsistent. So instead of testing for every loop iteration, I simply tested after the loop was run

// checked for the length instead of individual value in the loop, hence the below test wasn't added
expect( await page.evaluate(() => editor.history.log[editor.history.log.length - 1].text) ).toBe("some text " + i);

And then

// commented out this line because the value of i available to it is 0 which is inconsistent
expect(await page.evaluate(() => $('#history p.log:last .preview').html())).toBe("some text " + i + "...");

[gitpod-io]

[jywarren]

This looks great, can you resolve the conflicts and then we can merge! ✨

[NARUDESIGNS]

Hi, @jywarren I've resolved the conflict and removed the equivalent jasmine file as well. Please review again.
Thank you very much.

[jywarren]

Awesome work here!