enable test for header case-insensitive replacement

Author: davidgamero

samples/openapi3/client/petstore/typescript/tests/default/test/http/isomorphic-fetch.test.ts

@@ -68,15 +68,30 @@ for (let libName in libs) {
             }).catch(done)
         })
 
-        it("Case Insensitive Header Replacement", (done) => {
+    })
+    describe("Header Case Sensitivity", () => {
+        it("different case header key is replaced", () => {
             let requestContext = new petstore.RequestContext("http://httpbin.org/cookies", petstore.HttpMethod.GET);
-            requestContext.setHeaderParam("testkey1":"testvalue1");
+            expect(requestContext.getHeaders().testkey1).to.be.undefined;
+
+            requestContext.setHeaderParam("testkey1","testvalue1");
             expect(requestContext.getHeaders().testkey1).to.eq("testvalue1");
 
             // replace with differently cased key
-            requestContext.setHeaderParam("tEsTkeY1":"testvalue2");
+            requestContext.setHeaderParam("tEsTkeY1","testvalue2");
             expect(requestContext.getHeaders().testkey1).to.be.undefined;
             expect(requestContext.getHeaders().tEsTkeY1).to.eq("testvalue2");
         })
+        it("indentical header key writes replace content", () => {
+            let requestContext = new petstore.RequestContext("http://httpbin.org/cookies", petstore.HttpMethod.GET);
+            expect(requestContext.getHeaders().testkey1).to.be.undefined;
+
+            requestContext.setHeaderParam("testkey1","testvalue1");
+            expect(requestContext.getHeaders().testkey1).to.eq("testvalue1");
+
+            // replace with differently cased key
+            requestContext.setHeaderParam("testkey1","testvalue2");
+            expect(requestContext.getHeaders().testkey1).to.eq("testvalue2");
+        })
     })
 }