chore(tests): empty className test

afshinm · afshinm · commit 82e06a899cff · 2020-12-16T10:05:37.000Z
diff --git a/tests/util/addClass.test.js b/tests/util/addClass.test.js
@@ -51,4 +51,12 @@ describe("addClass", () => {
 
     expect(el.className).toBe("firstClass");
   });
+
+  test("should not append duplicate list of classNames to an empty className", () => {
+    const el = document.createElement("div");
+
+    addClass(el, "firstClass firstClass firstClass");
+
+    expect(el.className).toBe("firstClass");
+  });
 });
