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Ensure _.first, _.initial, _.last, and _.rest work with string and objects for callback.

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Former-commit-id: f587a5d11164c1c6fa050feccfb05956fd82a0d0
This commit is contained in:
John-David Dalton
2013-02-12 08:16:34 -08:00
parent 0b2d26ec92
commit fe1eb92196
8 changed files with 147 additions and 86 deletions
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73
test/test.js
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@@ -674,21 +674,26 @@
QUnit.module('lodash.find');
(function() {
var array = [
{ 'a': 1, 'b': 2, 'c': 3 },
{ 'a': 2, 'b': 2, 'c': 3 }
var objects = [
{ 'a': 0, 'b': 0 },
{ 'a': 1, 'b': 1 },
{ 'a': 2, 'b': 2 }
];
test('should return found `value`', function() {
equal(_.find(array, function(object) { return object.a == 1; }), array[0]);
equal(_.find(objects, function(object) { return object.a == 1; }), objects[1]);
});
test('should return `undefined` if `value` is not found', function() {
equal(_.find(array, function(object) { return object.a == 3; }), undefined);
equal(_.find(objects, function(object) { return object.a == 3; }), undefined);
});
test('should work with an object for `callback`', function() {
equal(_.find(array, { 'b': 2, 'c': 3 }), array[0]);
equal(_.find(objects, { 'b': 2 }), objects[2]);
});
test('should work with a string for `callback`', function() {
equal(_.find(objects, 'b'), objects[1]);
});
}());
@@ -699,6 +704,12 @@
(function() {
var array = [1, 2, 3];
var objects = [
{ 'a': 2, 'b': 2 },
{ 'a': 1, 'b': 1 },
{ 'a': 0, 'b': 0 }
];
test('should return the first element', function() {
strictEqual(_.first(array), 1);
});
@@ -755,6 +766,14 @@
var actual = _(array).first();
strictEqual(actual, 1);
});
test('should work with an object for `callback`', function() {
deepEqual(_.first(objects, { 'b': 2 }), objects.slice(0, 1));
});
test('should work with a string for `callback`', function() {
deepEqual(_.first(objects, 'b'), objects.slice(0, 2));
});
}());
/*--------------------------------------------------------------------------*/
@@ -965,6 +984,12 @@
(function() {
var array = [1, 2, 3];
var objects = [
{ 'a': 0, 'b': 0 },
{ 'a': 1, 'b': 1 },
{ 'a': 2, 'b': 2 }
];
test('returns all elements for `n` of `0`', function() {
deepEqual(_.initial(array, 0), [1, 2, 3]);
});
@@ -1011,6 +1036,14 @@
deepEqual(actual, [1]);
});
test('should work with an object for `callback`', function() {
deepEqual(_.initial(objects, { 'b': 2 }), objects.slice(0, 2));
});
test('should work with a string for `callback`', function() {
deepEqual(_.initial(objects, 'b'), objects.slice(0, 1));
});
}());
/*--------------------------------------------------------------------------*/
@@ -1306,6 +1339,12 @@
(function() {
var array = [1, 2, 3];
var objects = [
{ 'a': 0, 'b': 0 },
{ 'a': 1, 'b': 1 },
{ 'a': 2, 'b': 2 }
];
test('should return the last element', function() {
equal(_.last(array), 3);
});
@@ -1362,6 +1401,14 @@
var actual = _(array).last();
equal(actual, 3);
});
test('should work with an object for `callback`', function() {
deepEqual(_.last(objects, { 'b': 2 }), objects.slice(-1));
});
test('should work with a string for `callback`', function() {
deepEqual(_.last(objects, 'b'), objects.slice(-2));
});
}());
/*--------------------------------------------------------------------------*/
@@ -1927,6 +1974,12 @@
(function() {
var array = [1, 2, 3];
var objects = [
{ 'a': 2, 'b': 2 },
{ 'a': 1, 'b': 1 },
{ 'a': 0, 'b': 0 }
];
test('returns all elements for `n` of `0`', function() {
deepEqual(_.rest(array, 0), [1, 2, 3]);
});
@@ -1973,6 +2026,14 @@
deepEqual(actual, [3]);
});
test('should work with an object for `callback`', function() {
deepEqual(_.rest(objects, { 'b': 2 }), objects.slice(-2));
});
test('should work with a string for `callback`', function() {
deepEqual(_.rest(objects, 'b'), objects.slice(-1));
});
}());
/*--------------------------------------------------------------------------*/