Jasmine describe extensions for parameterised describes

describe-extensions.ts

export function testCase(...testParameters: any[]) {
    // Syntactic sugar function
    return testParameters;
}

export function testCases(...testCases: any[]){
    // Syntactic sugar function
    return testCases;
}

export function fdescribeWithParams(message: string, testCases: any[][], describeCallback: ((testParameters: any[]) => void)) {
    testCases.forEach(testParameters => {
        fdescribe(`${message} [${testParameters}]`, () => {
            describeCallback(testParameters);
        });
    });
}

export function describeWithParams(message: string, testCases: any[][], describeCallback: ((testParameters: any[]) => void)) {
    testCases.forEach(testParameters => {
        describe(`${message} [${testParameters}]`, () => {
            describeCallback(testParameters);
        });
    });
}

Usage:

describeWithParams('Given an image',
    testCases(
        testCase('http://i.imgur.com/b88DHtD.png', [310, 232]),
        testCase('http://i.imgur.com/3LMb2L6.jpg', [500, 329]),
        testCase('http://i.imgur.com/RYjVT1a.gif', [360, 240])
    ),
    (testParameters) => {
        let imageUrl: string = testParameters[0];
        let expectedDimensions: number[] = testParameters[1];

        beforeEach(() => {
            // ...
        });

        it('does something', () => {
            // ...
        });

        it('does something else', () => {
            // ...
        });

        describe('has a nested describe', () => {
            // **
        });

        fdescribeWithParams(...) // Focus spec- https://jasmine.github.io/2.1/focused_specs.html
    }
);