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Add support for shortcut fusion to _.flow and _.flowRight.

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This commit is contained in:
jdalton
2015-03-18 10:27:45 -07:00
parent e28e04a990
commit 462c482873
2 changed files with 60 additions and 14 deletions
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28
test/test.js
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@@ -2232,6 +2232,34 @@
notStrictEqual(combined, _.identity);
});
test('`_.' + methodName + '` should support shortcut fusion', 3, function() {
if (!isNpm) {
var filterCount = 0,
mapCount = 0;
var map = _.curry(_.rearg(_.ary(_.map, 2), 1, 0), 2),
filter = _.curry(_.rearg(_.ary(_.filter, 2), 1, 0), 2),
take = _.curry(_.rearg(_.ary(_.take, 2), 1, 0), 2);
var partialMap = map(function(value) { mapCount++; return value * value; }),
partialFilter = filter(function(value) { filterCount++; return value % 2 == 0; }),
partialTake = take(2);
var combined = isFlow
? func(partialMap, partialFilter, _.compact, partialTake)
: func(partialTake, _.compact, partialFilter, partialMap);
var actual = combined(_.range(100));
deepEqual(actual, [4, 16]);
strictEqual(filterCount, 5, 'filterCount');
strictEqual(mapCount, 5, 'mapCount');
}
else {
skipTest(3);
}
});
test('`_.' + methodName + '` should return a wrapped value when chaining', 1, function() {
if (!isNpm) {
var wrapped = _(_.noop)[methodName]();