spec/helpers.js
function expectRejection (promise, expectedReason) {
    return promise.then(
        () => fail('Expected promise to be rejected'),
        reason => {
            if (expectedReason instanceof Error) {
                expect(reason instanceof expectedReason.constructor).toBeTruthy();
                expect(reason.message).toContain(expectedReason.message);
            } else if (typeof expectedReason === 'function') {
                expect(expectedReason(reason)).toBeTruthy();
            } else if (expectedReason !== undefined) {
                expect(reason).toBe(expectedReason);
            } else {
                expect().nothing();
            }
        });
}
function expectRejection (promise, expectedReason) {
    return promise.then(
        () => fail('Expected promise to be rejected'),
        reason => {
            if (expectedReason instanceof Error) {
                expect(reason instanceof expectedReason.constructor).toBeTruthy();
                expect(reason.message).toContain(expectedReason.message);
            } else if (typeof expectedReason === 'function') {
                expect(expectedReason(reason)).toBeTruthy();
            } else if (expectedReason !== undefined) {
                expect(reason).toBe(expectedReason);
            } else {
                expect().nothing();
            }
        });
}
function expectRejection ( promise , expectedReason ) { return promise . then ( ( ) => fail ( 'Expected promise to be rejected' ) , reason => { if ( expectedReason instanceof Error ) { expect ( reason instanceof expectedReason . constructor ) . toBeTruthy ( ) ; expect ( reason . message ) . toContain ( expectedReason . message ) ; } else if ( typeof expectedReason === 'function' ) { expect ( expectedReason ( reason ) ) . toBeTruthy ( ) ; } else if ( expectedReason !== undefined ) { expect ( reason ) . toBe ( expectedReason ) ; } else { expect ( ) . nothing ( ) ; } } ) ; }
Expect promise to get rejected with a reason matching expectedReason
Expect promise to get rejected with a reason matching expectedReason