jasmine-marbles ~0.3.0 seems not to work with RxJS 6

[GregOnNet]

Tested with version

• jasmine-marbles 0.3.1 with RxJS
  • 6.0.0-tactical-rc.1
  • 6.0.0-uncanny-rc.7

Code to reproduce:

• I described the steps to reproduce the error in the following issue: Marble Tests broken ng-practice/bern-18-04-10#1
• for short:

  git clone https://github.com/ng-practice/bern-18-04-10
  git checkout marble-testing-probs
  yarn
  yarn test

Expected behavior:

The unit tests should pass.

Actual behavior:

Running karma test runner throws the following error:

HeadlessChrome 65.0.3325 (Windows 10.0.0) (effect) book-collection When a draft is saved successfully encountered a declaration exception FAILED
-        Error: No test scheduler initialized
            at getTestScheduler node_modules/jasmine-marbles/bundles/jasmine-marbles.umd.js:265:1)
            at new TestHotObservable node_modules/jasmine-marbles/bundles/jasmine-marbles.umd.js:303:1)
            at Object.hot node_modules/jasmine-marbles/bundles/jasmine-marbles.umd.js:313:1)
            at Suite.<anonymous> src/app/book/effects/book-collection.effects.spec.ts:10:34)
            at ZoneDelegate../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke node_modules/zone.js/dist/zone.js:388:1)
            at Zone../node_modules/zone.js/dist/zone.js.Zone.run node_modules/zone.js/dist/zone.js:138:1)

            at Suite.<anonymous> node_modules/zone.js/dist/zone-testing.js:491:1)
            at Env.jasmineEnv.(anonymous function) [as describe] node_modules/zone.js/dist/zone-testing.js:424:1)
HeadlessChrome 65.0.3325 (Windows 10.0.0): Executed 1 of 3 (1 FAILED) (0 secs / 0 secs)
HeadlessChrome 65.0.3325 (Windows 10.0.0) (effect) book-collection When a draft is saved successfully encountered a declaration exception FAILED
        Error: No test scheduler initialized
            at getTestScheduler node_modules/jasmine-marbles/bundles/jasmine-marbles.umd.js:265:1)
            at new TestHotObservable node_modules/jasmine-marbles/bundles/jasmine-marbles.umd.js:303:1)
            at Object.hot node_modules/jasmine-marbles/bundles/jasmine-marbles.umd.js:313:1)
            at Suite.<anonymous> src/app/book/effects/book-collection.effects.spec.ts:10:34)
            at ZoneDelegate../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke node_modules/zone.js/dist/zone.js:388:1)
            at Zone../node_modules/zone.js/dist/zone.js.Zone.run node_modules/zone.js/dist/zone.js:138:1)

            at Suite.<anonymous> node_modules/zone.js/dist/zone-testing.js:491:1)
            at Env.jasmineEnv.(anonymous function) [as describe] node_modules/zone.jHeadlessChrome 65.0.3325 (Windows 10.0.0): Executed 2 of 3 (1 FAILED) (0 secs / 0 seHeadlessChrome 65.0.3325 (Windows 10.0.0): Executed 3 of 3 (1 FAILED) (0 secs / 0 seHeadlessChrome 65.0.3325 (Windows 10.0.0): Executed 3 of 3 (1 FAILED) (0.116 secs / 0 secs)
error An unexpected error occurred: "Command failed.
Exit code: 1
Command: C:\\WINDOWS\\system32\\cmd.exe
Arguments: /d /s /c ng test
Directory: C:\\workbench\\projects\\bern-18-04-10
Output:
".
info If you think this is a bug, please open a bug report with the information provided in "C:\\workbench\\projects\\bern-18-04-10\\yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Please leave me a message if I can provide further information for you.

Kind Regards
Gregor

[davidgallegolobato]

Any progress on this? I am facing the same issue.

Thanks.

[davidgallegolobato]

I reply myself to the issue: calling the method initTestScheduler() fixed the issue.

[Rlcolli4]

I am having the same problem, we ran ng update @angular/cli @angular/core and everything else worked with out an issue, but after running our unit tests, we saw all our effects tests failing. We get stack traces similar to the following.

I can provide information on version of angular if needed.

(EDIT) Trying davidgallegolobato's fix just caused another error.

[jkyoutsey]

Angular 8.0.0 and RxJS 6.5.2 has this issue as well.

[jkyoutsey]

The answer as to how to fix this is on stackoverflow:
https://stackoverflow.com/a/56364159/2486918

import { addMatchers, initTestScheduler } from 'jasmine-marbles';

beforeEach(() => {
  ...
  initTestScheduler();
  addMatchers();
});