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Track arity of functions created by _.bind, _.bindKey, _.bindAll, _.partial, _.partialRight, _.curry, and _.wrap.

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This commit is contained in:
John-David Dalton
2014-01-21 19:59:13 -08:00
parent 58ce97c0b4
commit c1c92256ea
6 changed files with 577 additions and 439 deletions
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62
test/test.js
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@@ -1,6 +1,9 @@
;(function(root, undefined) {
'use strict';
/** Used as the size when optimizations are enabled for arrays */
var LARGE_ARRAY_SIZE = 75;
/** Used to store Lo-Dash to test for bad extensions/shims */
var lodashBizarro = root.lodashBizarro;
@@ -144,15 +147,15 @@
(_.runInContext ? _.runInContext(root) : _)
));
/** Used as the property name for wrapper metadata */
var expando = '__lodash@' + _.VERSION + '__';
/** Used to pass falsey values to methods */
var falsey = [, '', 0, false, NaN, null, undefined];
/** Used to pass empty values to methods */
var empties = [[], {}].concat(falsey.slice(1));
/** Used as the size when optimizations are enabled for large arrays */
var LARGE_ARRAY_SIZE = 75;
/** Used to set property descriptors */
var defineProperty = (function() {
try {
@@ -468,7 +471,7 @@
} catch(e) {
actual = null;
}
equal('__bindData__' in actual, false, message('Object.defineProperty'));
equal(expando in actual, false, message('Object.defineProperty'));
try {
actual = [lodashBizarro.isPlainObject({}), lodashBizarro.isPlainObject([])];
@@ -1503,7 +1506,7 @@
}
});
test('should only write `__bindData__` to named functions', 3, function() {
test('should only write metadata to named functions', 3, function() {
function a() {};
function c() {};
@@ -1512,16 +1515,16 @@
if (defineProperty && _.support.funcDecomp) {
_.createCallback(a, object);
ok('__bindData__' in a);
ok(expando in a);
_.createCallback(b, object);
equal('__bindData__' in b, false);
equal(expando in b, false);
if (_.support.funcNames) {
_.support.funcNames = false;
_.createCallback(c, object);
ok('__bindData__' in c);
ok(expando in c);
_.support.funcNames = true;
}
else {
@@ -1533,12 +1536,12 @@
}
});
test('should not write `__bindData__` when `_.support.funcDecomp` is `false`', 1, function() {
test('should not write metadata when `_.support.funcDecomp` is `false`', 1, function() {
function a() {};
if (defineProperty && lodashBizarro) {
lodashBizarro.createCallback(a, {});
equal('__bindData__' in a, false);
equal(expando in a, false);
}
else {
skipTest();
@@ -1557,13 +1560,12 @@
test('should curry based on the number of arguments provided', 3, function() {
var curried = _.curry(func);
equal(curried(1)(2)(3), 6);
equal(curried(1, 2)(3), 6);
equal(curried(1, 2, 3), 6);
});
test('should work with partial methods', 2, function() {
test('should work with partialed methods', 2, function() {
var curried = _.curry(func),
a = _.partial(curried, 1),
b = _.partialRight(a, 3),
@@ -1576,7 +1578,6 @@
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);
@@ -1599,9 +1600,7 @@
var value = this || {};
return value[a] + value[b] + value[c];
}
var object = { 'a': 1, 'b': 2, 'c': 3 };
equal(_.curry(_.bind(func, object), 3)('a')('b')('c'), 6);
equal(_.curry(_.bind(func, object), 3)('a', 'b')('c'), 6);
equal(_.curry(_.bind(func, object), 3)('a', 'b', 'c'), 6);
@@ -1611,7 +1610,6 @@
equal(_.bind(_.curry(func), object)('a', 'b', 'c'), 6);
object.func = _.curry(func);
ok(_.isEqual(object.func('a')('b')('c'), NaN));
ok(_.isEqual(object.func('a', 'b')('c'), NaN));
equal(object.func('a', 'b', 'c'), 6);
@@ -5862,22 +5860,18 @@
isPartial = methodName == 'partial';
test('`_.' + methodName + '` partially applies without additional arguments', 1, function() {
var arg = 'a',
fn = function(x) { return x; };
equal(func(fn, arg)(), arg);
var fn = function(a) { return a; };
equal(func(fn, 'a')(), 'a');
});
test('`_.' + methodName + '` partially applies with additional arguments', 1, function() {
var arg1 = 'a',
arg2 = 'b',
expected = [arg1, arg2],
fn = function(x, y) { return [x, y]; };
var expected = ['a', 'b'],
fn = function(a, b) { return [a, b]; };
if (!isPartial) {
expected.reverse();
}
deepEqual(func(fn, arg1)(arg2), expected);
deepEqual(func(fn, 'a')('b'), expected);
});
test('`_.' + methodName + '` works without partially applying arguments, without additional arguments', 1, function() {
@@ -5886,10 +5880,8 @@
});
test('`_.' + methodName + '` works without partially applying arguments, with additional arguments', 1, function() {
var arg = 'a',
fn = function(x) { return x; };
equal(func(fn)(arg), arg);
var fn = function(a) { return a; };
equal(func(fn)('a'), 'a');
});
test('`_.' + methodName + '` should not alter the `this` binding', 3, function() {
@@ -5910,7 +5902,7 @@
strictEqual(actual.length, 0);
});
test('ensure `new bound` is an instance of `func`', 2, function() {
test('`_.' + methodName + '` ensure `new bound` is an instance of `func`', 2, function() {
function Foo(value) {
return value && object;
}
@@ -5921,7 +5913,7 @@
strictEqual(new bound(true), object);
});
test('`_.' + methodName + '` should clone `__bindData__` for created functions', 3, function() {
test('`_.' + methodName + '` should clone metadata for created functions', 3, function() {
function greet(greeting, name) {
return greeting + ' ' + name;
}
@@ -5933,6 +5925,14 @@
equal(par2(), isPartial ? 'hi barney' : 'barney hi');
equal(par3(), isPartial ? 'hi pebbles' : 'pebbles hi');
});
test('`_.' + methodName + '` should work with curried methods', 2, function() {
var fn = function(a, b, c) { return a + b + c; },
curried = _.curry(func(fn, 1));
equal(curried(2, 3), 6);
equal(curried(2)(3), 6);
});
});
/*--------------------------------------------------------------------------*/