From 7e78f98f090168fe8b315a5e9438e635afdf93a4 Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Fri, 28 Aug 2020 08:32:21 +0200
Subject: Validate fragment name uniqueness

---
 tests/Language/GraphQL/ValidateSpec.hs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'tests/Language/GraphQL')

diff --git a/tests/Language/GraphQL/ValidateSpec.hs b/tests/Language/GraphQL/ValidateSpec.hs
index a547e21..8f6626b 100644
--- a/tests/Language/GraphQL/ValidateSpec.hs
+++ b/tests/Language/GraphQL/ValidateSpec.hs
@@ -255,3 +255,29 @@ spec =
                     , path = []
                     }
              in validate queryString `shouldBe` Seq.singleton expected
+
+        it "rejects fragments with the same name" $
+            let queryString = [r|
+              {
+                dog {
+                  ...fragmentOne
+                }
+              }
+
+              fragment fragmentOne on Dog {
+                name
+              }
+
+              fragment fragmentOne on Dog {
+                owner {
+                  name
+                }
+              }
+            |]
+                expected = Error
+                    { message =
+                        "There can be only one fragment named \"fragmentOne\"."
+                    , locations = [AST.Location 8 15, AST.Location 12 15]
+                    , path = []
+                    }
+             in validate queryString `shouldBe` Seq.singleton expected
-- 
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