1 files changed, 28 insertions, 0 deletions
diff --git a/value-equal/modules/__tests__/undefined-and-null-test.js b/value-equal/modules/__tests__/undefined-and-null-test.js
new file mode 100644
index 0000000..8efc7c1
--- /dev/null
+++ b/value-equal/modules/__tests__/undefined-and-null-test.js
@@ -0,0 +1,28 @@
+import valueEqual from 'value-equal';
+
+describe('undefined and null', () => {
+  describe('when both are undefined', () => {
+    it('returns true', () => {
+      expect(valueEqual(undefined, undefined)).toBe(true);
+    });
+  });
+
+  describe('when both are null', () => {
+    it('returns true', () => {
+      expect(valueEqual(null, null)).toBe(true);
+    });
+  });
+
+  describe('when one is null', () => {
+    it('returns false', () => {
+      expect(valueEqual(undefined, null)).toBe(false);
+    });
+  });
+
+  describe('when one is null and the other is an object', () => {
+    it('returns false', () => {
+      expect(valueEqual({}, null)).toBe(false);
+      expect(valueEqual(null, {})).toBe(false);
+    });
+  });
+});