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Add _.before.

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This commit is contained in:
John-David Dalton
2014-07-01 09:27:43 -07:00
parent 6622922468
commit b084210705
2 changed files with 103 additions and 36 deletions
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63
test/test.js
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@@ -621,15 +621,29 @@
}
test('should create a function that executes `func` after `n` calls', 4, function() {
strictEqual(after(5, 5), 1, 'after(n) should execute `func` after being called `n` times');
strictEqual(after(5, 4), 0, 'after(n) should not execute `func` unless called `n` times');
strictEqual(after(5, 4), 0, 'after(n) should not execute `func` before being called `n` times');
strictEqual(after(0, 0), 0, 'after(0) should not execute `func` immediately');
strictEqual(after(0, 1), 1, 'after(0) should execute `func` when called once');
});
test('should coerce non-finite `n` values to `0`', 3, function() {
_.each([-Infinity, NaN, Infinity], function(n) {
strictEqual(after(n, 1), 1);
test('should coerce non-finite `n` values to `0`', 1, function() {
var values = [-Infinity, NaN, Infinity],
expected = _.map(values, _.constant(1));
var actual = _.map(values, function(n) {
return after(n, 1);
});
deepEqual(actual, expected);
});
test('should not set a `this` binding', 2, function() {
var after = _.after(1, function() { return ++this.count; }),
object = { 'count': 0, 'after': after };
object.after();
strictEqual(object.after(), 2);
strictEqual(object.count, 2);
});
}());
@@ -724,6 +738,44 @@
/*--------------------------------------------------------------------------*/
QUnit.module('lodash.before');
(function() {
function before(n, times) {
var count = 0;
_.times(times, _.before(n, function() { count++; }));
return count;
}
test('should create a function that executes `func` after `n` calls', 4, function() {
strictEqual(before(5, 4), 4, 'before(n) should execute `func` before being called `n` times');
strictEqual(before(5, 6), 4, 'before(n) should not execute `func` after being called `n - 1` times');
strictEqual(before(0, 0), 0, 'before(0) should not execute `func` immediately');
strictEqual(before(0, 1), 0, 'before(0) should not execute `func` when called');
});
test('should coerce non-finite `n` values to `0`', 1, function() {
var values = [-Infinity, NaN, Infinity],
expected = _.map(values, _.constant(0));
var actual = _.map(values, function(n) {
return before(n);
});
deepEqual(actual, expected);
});
test('should not set a `this` binding', 2, function() {
var before = _.before(2, function() { return ++this.count; }),
object = { 'count': 0, 'before': before };
object.before();
strictEqual(object.before(), 1);
strictEqual(object.count, 1);
});
}());
/*--------------------------------------------------------------------------*/
QUnit.module('lodash.bind');
(function() {
@@ -11316,6 +11368,7 @@
var rejectFalsey = [
'after',
'before',
'bind',
'compose',
'curry',
@@ -11401,7 +11454,7 @@
});
});
test('should throw a TypeError for falsey arguments', 16, function() {
test('should throw a TypeError for falsey arguments', 17, function() {
_.each(rejectFalsey, function(methodName) {
var expected = _.map(falsey, _.constant(true)),
func = _[methodName];