From 60cbbf7535bc073f71ac61796a86a4d2a146acac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?O=C4=9Fuz=20K=C4=B1l=C4=B1=C3=A7?= <oguzz.kilic@gmail.com>
Date: Wed, 6 Feb 2019 14:05:56 +0300
Subject: [PATCH] fix(test): updated tests and docs

---
 docs/index.md         |  2 +-
 test/superset.spec.js | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/docs/index.md b/docs/index.md
index 7203b98..c5b9a2b 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -297,7 +297,7 @@ nums.update([2, 4, 6]);  // → SuperSet { 0, 1, 2, 4, 6 }
 
 ## `discard(iterable)`
 
-The discard() method deletes the iterable elements from the set and return the updated elements.
+The discard() method deletes the iterable elements from the data set and returns the updated elements.
 
 ### Example
 
diff --git a/test/superset.spec.js b/test/superset.spec.js
index f4cf20a..f016561 100644
--- a/test/superset.spec.js
+++ b/test/superset.spec.js
@@ -219,5 +219,19 @@ describe("SuperSet", () => {
 
             expect(Array.from(result)).to.eql([2]);
         });
+
+        it("should delete undefined elements and return updated elements.", () => {
+            const result = testSet.discard([7]);
+
+            expect(Array.from(result)).to.eql([1, 2, 3]);
+        });
+
+        it("should delete again same elements in an iterable way and return current elements.", () => {
+            const result = testSet.discard([1]);
+            expect(Array.from(result)).to.eql([2, 3]);
+
+            const sameResult = testSet.discard([1]);
+            expect(Array.from(sameResult)).to.eql([2, 3]);
+        });
     });
 });