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24 lines
482 B
24 lines
482 B
4 months ago
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import assert from 'assert';
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describe('flatMap', () => {
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it('maps and flattens the results using the supplied callback', async () => {
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let list = [];
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await Observable.of('a', 'b', 'c').flatMap(x =>
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Observable.of(1, 2, 3).map(y => [x, y])
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).forEach(x => list.push(x));
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assert.deepEqual(list, [
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['a', 1],
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['a', 2],
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['a', 3],
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['b', 1],
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['b', 2],
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['b', 3],
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['c', 1],
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['c', 2],
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['c', 3],
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]);
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});
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});
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