Add ability to reorder playlist items

utils/strings_test.go

@@ -48,4 +48,16 @@ var _ = Describe("Strings", func() {
 			Expect(StringInSlice("bbb", []string{"bbb", "aaa", "ccc"})).To(BeTrue())
 		})
 	})
+
+	Describe("MoveString", func() {
+		It("moves item to end of slice", func() {
+			Expect(MoveString([]string{"1", "2", "3"}, 0, 2)).To(ConsistOf("2", "3", "1"))
+		})
+		It("moves item to beginning of slice", func() {
+			Expect(MoveString([]string{"1", "2", "3"}, 2, 0)).To(ConsistOf("3", "1", "2"))
+		})
+		It("keeps item in same position if srcIndex == dstIndex", func() {
+			Expect(MoveString([]string{"1", "2", "3"}, 1, 1)).To(ConsistOf("1", "2", "3"))
+		})
+	})
 })