| 1 | const test = require('tape');
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| 2 | const { reduceMap } = require('./iterable');
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| 3 |
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| 4 | test('reduceMap()', assert => {
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| 5 | const createMap = () =>
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| 6 | new Map([
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| 7 | [() => false, () => false],
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| 8 | [(first, second) => second === 'b', (third, fourth) => fourth],
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| 9 | ]);
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| 10 |
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| 11 | {
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| 12 | const actual = reduceMap({
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| 13 | map: createMap(),
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| 14 | keyArguments: ['a', 'b'],
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| 15 | valueArguments: ['c', 'd'],
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| 16 | });
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| 17 | const expected = 'd';
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| 18 | const message =
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| 19 | 'returns the output of the first value function where the key function is truthy';
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| 20 |
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| 21 | assert.equal(actual, expected, message);
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| 22 | }
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| 23 | {
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| 24 | const actual = reduceMap({
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| 25 | map: createMap(),
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| 26 | fallback: 'foo',
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| 27 | });
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| 28 | const expected = 'foo';
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| 29 | const message = 'returns the fallback value if there are no matches';
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| 30 |
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| 31 | assert.equal(actual, expected, message);
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| 32 | }
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| 33 | {
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| 34 | const actual = reduceMap({
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| 35 | map: createMap(),
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| 36 | valueArguments: ['c', 'd'],
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| 37 | fallback: (first, second) => second,
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| 38 | });
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| 39 | const expected = 'd';
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| 40 | const message =
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| 41 | 'supports fallback as a function, with the functionArgs supplied';
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| 42 |
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| 43 | assert.equal(actual, expected, message);
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| 44 | }
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| 45 | assert.end();
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| 46 | });
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