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Add callback and thisArg arguments to _.drop and _.pick. [closes #62]

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Former-commit-id: 990655e9e849348c287b3d994d2e2dc741f78fbf
This commit is contained in:
John-David Dalton
2012-08-26 03:06:43 -07:00
parent a5a6cabac6
commit 21010c6540
2 changed files with 109 additions and 33 deletions
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72
test/test.js
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@@ -336,11 +336,11 @@
QUnit.module('lodash.drop');
(function() {
var object = { 'a': 1, 'b': 2, 'c': 3 },
var object = { 'a': 1, 'b': 2 },
actual = { 'b': 2 };
test('should accept individual property names', function() {
deepEqual(_.drop(object, 'a', 'c'), actual);
deepEqual(_.drop(object, 'a'), actual);
});
test('should accept an array of property names', function() {
@@ -355,7 +355,38 @@
function Foo() {}
Foo.prototype = object;
deepEqual(_.drop(new Foo, 'a', 'c'), actual);
deepEqual(_.drop(new Foo, 'a'), actual);
});
test('should work with a `callback` argument', function() {
var actual = _.drop(object, function(value) {
return value == 1;
});
deepEqual(actual, { 'b': 2 });
});
test('should pass the correct `callback` arguments', function() {
var args,
lastKey = _.keys(object).pop();
var expected = lastKey == 'b'
? [1, 'a', object]
: [2, 'b', object];
_.drop(object, function() {
args || (args = slice.call(arguments));
});
deepEqual(args, expected);
});
test('should correct set the `this` binding', function() {
var actual = _.drop(object, function(value) {
return value == this.a;
}, { 'a': 1 });
deepEqual(actual, { 'b': 2 });
});
}());
@@ -1070,12 +1101,45 @@
QUnit.module('lodash.pick');
(function() {
var object = { 'a': 1, 'b': 2 };
test('should iterate over inherited properties', function() {
function Foo() {}
Foo.prototype = { 'a': 1, 'b': 2, 'c': 3 };
Foo.prototype = object;
deepEqual(_.pick(new Foo, 'b'), { 'b': 2 });
});
test('should work with a `callback` argument', function() {
var actual = _.pick(object, function(value) {
return value == 2;
});
deepEqual(actual, { 'b': 2 });
});
test('should pass the correct `callback` arguments', function() {
var args,
lastKey = _.keys(object).pop();
var expected = lastKey == 'b'
? [1, 'a', object]
: [2, 'b', object];
_.pick(object, function() {
args || (args = slice.call(arguments));
});
deepEqual(args, expected);
});
test('should correct set the `this` binding', function() {
var actual = _.pick(object, function(value) {
return value == this.b;
}, { 'b': 2 });
deepEqual(actual, { 'b': 2 });
});
}());
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