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Add _.bind, _.partial, _.partialRight, & _.curry tests for function length.

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John-David Dalton
2013-11-05 08:36:32 -08:00
parent 2e485b9ac5
commit 7940428b9b
1 changed files with 35 additions and 15 deletions
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50
test/test.js
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@@ -547,6 +547,13 @@
deepEqual(bound('c', 'd'), [object, 'a', 'b', 'c', 'd']); deepEqual(bound('c', 'd'), [object, 'a', 'b', 'c', 'd']);
}); });
test('bound functions should have a `length` of `0`', 1, function() {
var func = function(a, b, c) {},
bound = _.bind(func, {});
strictEqual(bound.length, 0);
});
test('should ignore binding when called with the `new` operator', 3, function() { test('should ignore binding when called with the `new` operator', 3, function() {
function Foo() { function Foo() {
return this; return this;
@@ -560,13 +567,6 @@
ok(newBound instanceof Foo); ok(newBound instanceof Foo);
}); });
test('should append array arguments to partially applied arguments (test in IE < 9)', 1, function() {
var object = {},
bound = _.bind(func, object, 'a');
deepEqual(bound(['b'], 'c'), [object, 'a', ['b'], 'c']);
});
test('ensure `new bound` is an instance of `func`', 1, function() { test('ensure `new bound` is an instance of `func`', 1, function() {
var func = function() {}, var func = function() {},
bound = _.bind(func, {}); bound = _.bind(func, {});
@@ -574,6 +574,13 @@
ok(new bound instanceof func); ok(new bound instanceof func);
}); });
test('should append array arguments to partially applied arguments (test in IE < 9)', 1, function() {
var object = {},
bound = _.bind(func, object, 'a');
deepEqual(bound(['b'], 'c'), [object, 'a', ['b'], 'c']);
});
test('should throw a TypeError if `func` is not a function', 1, function() { test('should throw a TypeError if `func` is not a function', 1, function() {
raises(function() { _.bind(); }, TypeError); raises(function() { _.bind(); }, TypeError);
}); });
@@ -1270,11 +1277,11 @@
QUnit.module('lodash.curry'); QUnit.module('lodash.curry');
(function() { (function() {
test('should curry based on the number of arguments provided', 3, function() { function func(a, b, c) {
function func(a, b, c) { return a + b + c;
return a + b + c; }
}
test('should curry based on the number of arguments provided', 3, function() {
var curried = _.curry(func); var curried = _.curry(func);
equal(curried(1)(2)(3), 6); equal(curried(1)(2)(3), 6);
@@ -1283,10 +1290,6 @@
}); });
test('should work with partial methods', 2, function() { test('should work with partial methods', 2, function() {
function func(a, b, c) {
return a + b + c;
}
var curried = _.curry(func), var curried = _.curry(func),
a = _.partial(curried, 1), a = _.partial(curried, 1),
b = _.partialRight(a, 3), b = _.partialRight(a, 3),
@@ -1296,6 +1299,16 @@
equal(c(), 6); equal(c(), 6);
}); });
test('should return a function with a `length` of `0`', 6, function() {
_.times(2, function(index) {
var curried = index ? _.curry(func, 4) : _.curry(func);
strictEqual(curried.length, 0);
strictEqual(curried(1).length, 0);
strictEqual(curried(1, 2).length, 0);
});
});
test('should not alter the `this` binding', 9, function() { test('should not alter the `this` binding', 9, function() {
function func(a, b, c) { function func(a, b, c) {
var value = this || {}; var value = this || {};
@@ -5238,6 +5251,13 @@
object.fn = func(fn); object.fn = func(fn);
strictEqual(object.fn(), object.a); strictEqual(object.fn(), object.a);
}); });
test('`_.' + methodName + '` returns a function with a `length` of `0`', 1, function() {
var func = function(a, b, c) {},
actual = _.partial(func, 'a');
strictEqual(actual.length, 0);
});
}); });
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