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Ensure _.merge doesn't modify array/typed-array/plain-object source values.

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This commit is contained in:
John-David Dalton
2015-09-12 09:18:45 -07:00
parent 1320706172
commit dafe807888
2 changed files with 20 additions and 6 deletions
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4
lodash.js
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@@ -2565,12 +2565,12 @@
if (isArray(srcValue) || isTypedArray(srcValue)) {
newValue = isArray(oldValue)
? oldValue
: ((isObject(oldValue) && isArrayLike(oldValue)) ? copyArray(oldValue) : srcValue);
: ((isObject(oldValue) && isArrayLike(oldValue)) ? copyArray(oldValue) : baseClone(srcValue));
}
else if (isPlainObject(srcValue) || isArguments(srcValue)) {
newValue = isArguments(oldValue)
? toPlainObject(oldValue)
: (isObject(oldValue) ? oldValue : srcValue);
: (isObject(oldValue) ? oldValue : baseClone(srcValue));
}
else {
isCommon = isFunction(srcValue);

22
test/test.js
View File

@@ -12245,17 +12245,31 @@
assert.strictEqual(actual.a, null);
});
QUnit.test('should assign non array/plain-object values directly', function(assert) {
QUnit.test('should assign non array/typed-array/plain-object sources directly', function(assert) {
assert.expect(1);
function Foo() {}
var values = [new Foo, new Boolean, new Date, Foo, new Number, new String, new RegExp, new (Uint8Array || noop)],
var values = [new Foo, new Boolean, new Date, Foo, new Number, new String, new RegExp],
expected = _.map(values, _.constant(true));
var actual = _.map(values, function(value) {
var object = _.merge({}, { 'a': value });
return object.a === value;
var object = _.merge({}, { 'value': value });
return object.value === value;
});
assert.deepEqual(actual, expected);
});
QUnit.test('should shallow clone array/typed-array/plain-object sources', function(assert) {
assert.expect(1);
var values = [[], new (Uint8Array || Object), {}],
expected = _.map(values, _.constant(true));
var actual = _.map(values, function(value) {
var object = _.merge({}, { 'value': value });
return object.value !== value && _.isEqual(object.value, value);
});
assert.deepEqual(actual, expected);