feat(facade): add maximum method for ListWrapper

2015-08-13 11:19:37 -07:00
parent 5c95b376b5
commit b5c4d8ba79
3 changed files with 56 additions and 1 deletions
@@ -76,6 +76,20 @@ export function main() {
      it('should respect the startIndex parameter',
         () => { expect(ListWrapper.indexOf(l, 1, 1)).toEqual(-1); });
    });
+
+    describe('maximum', () => {
+      it('should return the maximal element',
+         () => { expect(ListWrapper.maximum([1, 2, 3, 4], x => x)).toEqual(4); });
+
+      it('should ignore null values',
+         () => { expect(ListWrapper.maximum([null, 2, 3, null], x => x)).toEqual(3); });
+
+      it('should use the provided function to determine maximum',
+         () => { expect(ListWrapper.maximum([1, 2, 3, 4], x => -x)).toEqual(1); });
+
+      it('should return null for an empty list',
+         () => { expect(ListWrapper.maximum([], x => x)).toEqual(null); });
+    });
  });

  describe('StringMapWrapper', () => {