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How to expect optionally in jasmine. #Typescript solve: https://github.com/jasmine/jasmine/issues/1539
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| /** | |
| * Create an optional expectation for a spec. | |
| * @param actual Actual computed value to test expectations against. | |
| */ | |
| export function expectOptionally<T>(actual: any): jasmine.Matchers<T> { | |
| if (!isNullOrUndefined(actual)) { | |
| return expect(actual); | |
| } | |
| const voidExpect = new Proxy(expect(actual), | |
| { | |
| get: (target: any, prop) => { | |
| if (Object.keys(jasmine["matchers"]).indexOf(prop as string) !== -1) { | |
| return (actual: any, expected: any): jasmine.CustomMatcherResult => { | |
| let passed = true; | |
| target.addExpectationResult(passed, { | |
| matcherName: prop as String, | |
| passed, | |
| expected, | |
| actual, | |
| message: "Nothing to tell...", | |
| error: null | |
| }); | |
| return; | |
| }; | |
| } | |
| else | |
| return target[prop]; | |
| } | |
| }); | |
| return voidExpect as jasmine.Matchers<T>; | |
| } |
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