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Add lazy tests for _.first and _.last.

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This commit is contained in:
John-David Dalton
2014-10-20 22:17:48 -07:00
parent 176b109ae7
commit 55911eac7a
1 changed files with 36 additions and 5 deletions
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41
test/test.js
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@@ -3702,7 +3702,9 @@
}); });
test('should return `undefined` when querying empty arrays', 1, function() { test('should return `undefined` when querying empty arrays', 1, function() {
strictEqual(_.first([]), undefined); var array = [];
array['-1'] = 1;
strictEqual(_.first(array), undefined);
}); });
test('should work as an iteratee for `_.map`', 1, function() { test('should work as an iteratee for `_.map`', 1, function() {
@@ -3721,6 +3723,21 @@
} }
}); });
test('should work in a lazy chain sequence', 1, function() {
if (!isNpm) {
var array = [1, 2, 3, 4];
var wrapped = _(array).filter(function(value) {
return value % 2 == 0;
});
strictEqual(wrapped.first(), 2);
}
else {
skipTest();
}
});
test('should be aliased', 1, function() { test('should be aliased', 1, function() {
strictEqual(_.head, _.first); strictEqual(_.head, _.first);
}); });
@@ -7033,7 +7050,7 @@
}); });
test('should return `undefined` when querying empty arrays', 1, function() { test('should return `undefined` when querying empty arrays', 1, function() {
var array = [] var array = [];
array['-1'] = 1; array['-1'] = 1;
strictEqual(_.last([]), undefined); strictEqual(_.last([]), undefined);
}); });
@@ -7053,6 +7070,21 @@
skipTest(); skipTest();
} }
}); });
test('should work in a lazy chain sequence', 1, function() {
if (!isNpm) {
var array = [1, 2, 3, 4];
var wrapped = _(array).filter(function(value) {
return value % 2;
});
strictEqual(wrapped.last(), 3);
}
else {
skipTest();
}
});
}()); }());
/*--------------------------------------------------------------------------*/ /*--------------------------------------------------------------------------*/
@@ -8130,11 +8162,10 @@
(function() { (function() {
test('should create a function that negates the result of `func`', 2, function() { test('should create a function that negates the result of `func`', 2, function() {
function isEven(n) { var negate = _.negate(function(n) {
return n % 2 == 0; return n % 2 == 0;
} });
var negate = _.negate(isEven);
strictEqual(negate(1), true); strictEqual(negate(1), true);
strictEqual(negate(2), false); strictEqual(negate(2), false);
}); });