78 lines
1.6 KiB
JavaScript
78 lines
1.6 KiB
JavaScript
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var map = require('../');
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var test = require('tape');
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test('numbers -> letters', function (t) {
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t.plan(2);
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var a = map([97,98,99], function (c) {
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return String.fromCharCode(c);
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});
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t.equal(a.join(''), 'abc');
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var b = map(cripple([97,98,99]), function (c) {
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return String.fromCharCode(c);
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});
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t.equal(b.join(''), 'abc');
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});
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test('elements and indexes', function (t) {
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t.plan(8);
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var x = { q: 5 }, y = 3, z = null;
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t.deepEqual(
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map([x,y,z], function (c, i) { return i }),
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[ 0, 1, 2 ],
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'index check'
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);
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t.deepEqual(
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map([x,y,z], function (c, i) { return i }),
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[ 0, 1, 2 ],
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'crippled index check'
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);
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var xs0 = [ x, y, z ];
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map(xs0, function (c, i, xs) {
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t.strictEqual(xs, xs0, 'argument[2]');
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});
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var xs1 = [ x, y, z ];
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map(xs1, function (c, i, xs) {
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t.strictEqual(xs, xs1, 'crippled argument[2]');
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});
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});
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test('ignore holes', function (t) {
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t.plan(2);
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t.deepEqual(
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map(new Array(5), function (x) { return x }),
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[]
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);
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t.deepEqual(
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map(cripple(new Array(5)), function (x) { return x }),
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[]
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);
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});
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test('sparse map', function (t) {
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t.plan(2);
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var xs = new Array(5);
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xs[2] = 'a';
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xs[4] = 'b';
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t.equal(
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map(xs, function (x, i) { return x + i }).join(''),
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'a2b4'
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);
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var ys = new Array(5);
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ys[2] = 'a';
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ys[4] = 'b';
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t.equal(
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map(cripple(xs), function (x, i) { return x + i }).join(''),
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'a2b4'
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);
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t.end();
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});
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function cripple (xs) {
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xs.map = undefined;
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return xs;
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}
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