Get all tests working

[DonJayamanne]

1. Add python interpreter API for local tests
2. Ensure all of the following work:

• *.unit.test.ts
• *.test.ts
• *.functional.test.ts
• *.ds.test.ts

Right now a lot of them fall over due to some missing dependencies & the like

[DonJayamanne]

Currently partially blocked on #2
Will limit scope to just DS tests for now (with the assumption that core tests will be removed).

[DonJayamanne]

All test working, now need to test with real jupyter.

[DonJayamanne]

Failing tests seem way too low, running once again

[DonJayamanne]

Here are the failures
2020-09-16T19:00:50.8403966Z
2020-09-16T19:00:50.8407517Z �[92m �[0m�[32m 409 passing�[0m�[90m (1h)�[0m
2020-09-16T19:00:50.8408557Z �[36m �[0m�[36m 105 pending�[0m
2020-09-16T19:00:50.8409469Z �[31m 5 failing�[0m
2020-09-16T19:00:50.8410016Z
2020-09-16T19:00:50.8433681Z �[0m 1) DataScience Interactive Window output tests
2020-09-16T19:00:50.8435065Z Multiple Interpreters:
2020-09-16T19:00:50.8435555Z
2020-09-16T19:00:50.8436830Z �[31mAssertionError [ERR_ASSERTION]: Second path was not set�[0m
2020-09-16T19:00:50.8437943Z �[32m+ expected�[0m �[31m- actual�[0m
2020-09-16T19:00:50.8439072Z
2020-09-16T19:00:50.8439783Z �[0m�[90m
2020-09-16T19:00:50.8441142Z at interactiveWindowTestHelpers_1.runTest.window.window (out/test/datascience/interactiveWindow.functional.test.js:445:20)
2020-09-16T19:00:50.8442468Z at runMicrotasks ()
2020-09-16T19:00:50.8443160Z at runNextTicks (internal/process/task_queues.js:59:5)
2020-09-16T19:00:50.8443879Z at listOnTimeout (internal/timers.js:501:9)
2020-09-16T19:00:50.8444564Z at processTimers (internal/timers.js:475:7)
2020-09-16T19:00:50.8445590Z at Context. (out/test/datascience/interactiveWindowTestHelpers.js:49:13)
2020-09-16T19:00:50.8446595Z �[0m
2020-09-16T19:00:50.8447471Z �[0m 2) DataScience - Kernel Launcher
2020-09-16T19:00:50.8448135Z Launch with environment:
2020-09-16T19:00:50.8450778Z �[0m�[31m Error: Timeout of 10000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/home/runner/work/vscode-jupyter/vscode-jupyter/out/test/datascience/kernelLauncher.functional.test.js)�[0m�[90m
2020-09-16T19:00:50.8452440Z at listOnTimeout (internal/timers.js:531:17)
2020-09-16T19:00:50.8453363Z at processTimers (internal/timers.js:475:7)
2020-09-16T19:00:50.8454108Z �[0m
2020-09-16T19:00:50.8454900Z �[0m 3) DataScience notebook tests
2020-09-16T19:00:50.8455661Z With Jupyter Server
2020-09-16T19:00:50.8456145Z Export/Import:
2020-09-16T19:00:50.8457160Z �[0m�[31m AssertionError: No os.chdir in import: expected false to be truthy�[0m�[90m
2020-09-16T19:00:50.8458849Z at /home/runner/work/vscode-jupyter/vscode-jupyter/out/test/datascience/notebook.functional.test.js:443:35
2020-09-16T19:00:50.8460211Z at runMicrotasks ()
2020-09-16T19:00:50.8461249Z at processTicksAndRejections (internal/process/task_queues.js:94:5)
2020-09-16T19:00:50.8462124Z �[0m
2020-09-16T19:00:50.8463107Z �[0m 4) DataScience notebook tests
2020-09-16T19:00:50.8463895Z With Direct Kernel
2020-09-16T19:00:50.8464412Z Export/Import:
2020-09-16T19:00:50.8465525Z �[0m�[31m AssertionError: No os.chdir in import: expected false to be truthy�[0m�[90m
2020-09-16T19:00:50.8467236Z at /home/runner/work/vscode-jupyter/vscode-jupyter/out/test/datascience/notebook.functional.test.js:443:35
2020-09-16T19:00:50.8468494Z at runMicrotasks ()
2020-09-16T19:00:50.8469492Z at processTicksAndRejections (internal/process/task_queues.js:94:5)
2020-09-16T19:00:50.8472135Z �[0m
2020-09-16T19:00:50.8472767Z �[0m 5) DataScience raw kernel tests
2020-09-16T19:00:50.8473255Z Interrupt pending request:
2020-09-16T19:00:50.8475339Z �[0m�[31m Error: Timeout of 10000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/home/runner/work/vscode-jupyter/vscode-jupyter/out/test/datascience/raw-kernel/rawKernel.functional.test.js)�[0m�[90m
2020-09-16T19:00:50.8477301Z at listOnTimeout (internal/timers.js:531:17)
2020-09-16T19:00:50.8477871Z at processTimers (internal/timers.js:475:7)
2020-09-16T19:00:50.8478463Z �[0m
2020-09-16T19:00:50.8478660Z
2020-09-16T19:00:50.8478821Z
2020-09-16T19:00:51.6199635Z npm ERR! code ELIFECYCLE
2020-09-16T19:00:51.6200236Z npm ERR! errno 5
2020-09-16T19:00:51.6202790Z npm ERR! jupyter@2020.9.0-dev test:functional: mocha --require source-map-support/register --config ./build/.mocha.functional.json
2020-09-16T19:00:51.6203796Z npm ERR! Exit status 5
2020-09-16T19:00:51.6204139Z npm ERR!
2020-09-16T19:00:51.6204884Z npm ERR! Failed at the jupyter@2020.9.0-dev test:functional script.
2020-09-16T19:00:51.6205919Z npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
2020-09-16T19:00:51.7215475Z
2020-09-16T19:00:51.7216162Z npm ERR! A complete log of this run can be found in:
2020-09-16T19:00:51.7217330Z npm ERR! /home/runner/.npm/_logs/2020-09-16T19_00_51_617Z-debug.log
2020-09-16T19:00:51.7252568Z ##[error]Process completed with exit code 5.

[DonJayamanne]

Completed