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Add placeholder support to _.curry.

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John-David Dalton
2014-03-29 02:13:52 -07:00
parent bb42b87f4e
commit 141227d846
2 changed files with 58 additions and 36 deletions
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57
test/test.js
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@@ -1730,25 +1730,42 @@
(function() {
function fn(a, b, c, d) {
return a + b + c + d;
return slice.call(arguments);
}
test('should curry based on the number of arguments provided', 3, function() {
var curried = _.curry(fn);
equal(curried(1)(2)(3)(4), 10);
equal(curried(1, 2)(3, 4), 10);
equal(curried(1, 2, 3, 4), 10);
var curried = _.curry(fn),
expected = [1, 2, 3, 4];
deepEqual(curried(1)(2)(3)(4), expected);
deepEqual(curried(1, 2)(3, 4), expected);
deepEqual(curried(1, 2, 3, 4), expected);
});
test('should work with partialed methods', 2, function() {
var curried = _.curry(fn),
a = _.partial(curried, 1),
expected = [1, 2, 3, 4];
var a = _.partial(curried, 1),
b = _.bind(a, null, 2),
c = _.partialRight(b, 4),
d = _.partialRight(b(3), 4);
equal(c(3), 10);
equal(d(), 10);
deepEqual(c(3), expected);
deepEqual(d(), expected);
});
test('should support placeholders', 4, function() {
if (isPreBuild) {
var curried = _.curry(fn);
deepEqual(curried(1)(_, 3)(_, 4)(2), [1, 2, 3, 4]);
deepEqual(curried(_, 2)(1)(_, 4)(3), [1, 2, 3, 4]);
deepEqual(curried(_, _, 3)(_, 2)(_, 4)(1), [1, 2, 3, 4]);
deepEqual(curried(_, _, _, 4)(_, _, 3)(_, 2)(1), [1, 2, 3, 4]);
}
else {
skipTest(4);
}
});
test('should return a function with a `length` of `0`', 6, function() {
@@ -1774,22 +1791,24 @@
test('should not alter the `this` binding', 9, function() {
var fn = function(a, b, c) {
var value = this || {};
return value[a] + value[b] + value[c];
return [value[a], value[b], value[c]];
};
var object = { 'a': 1, 'b': 2, 'c': 3 };
equal(_.curry(_.bind(fn, object), 3)('a')('b')('c'), 6);
equal(_.curry(_.bind(fn, object), 3)('a', 'b')('c'), 6);
equal(_.curry(_.bind(fn, object), 3)('a', 'b', 'c'), 6);
var object = { 'a': 1, 'b': 2, 'c': 3 },
expected = [1, 2, 3];
ok(_.isEqual(_.bind(_.curry(fn), object)('a')('b')('c'), NaN));
ok(_.isEqual(_.bind(_.curry(fn), object)('a', 'b')('c'), NaN));
equal(_.bind(_.curry(fn), object)('a', 'b', 'c'), 6);
deepEqual(_.curry(_.bind(fn, object), 3)('a')('b')('c'), expected);
deepEqual(_.curry(_.bind(fn, object), 3)('a', 'b')('c'), expected);
deepEqual(_.curry(_.bind(fn, object), 3)('a', 'b', 'c'), expected);
deepEqual(_.bind(_.curry(fn), object)('a')('b')('c'), Array(3));
deepEqual(_.bind(_.curry(fn), object)('a', 'b')('c'), Array(3));
deepEqual(_.bind(_.curry(fn), object)('a', 'b', 'c'), expected);
object.curried = _.curry(fn);
ok(_.isEqual(object.curried('a')('b')('c'), NaN));
ok(_.isEqual(object.curried('a', 'b')('c'), NaN));
equal(object.curried('a', 'b', 'c'), 6);
deepEqual(object.curried('a')('b')('c'), Array(3));
deepEqual(object.curried('a', 'b')('c'), Array(3));
deepEqual(object.curried('a', 'b', 'c'), expected);
});
}());