Add test cases to cover different collection formats (#3640)

* add test cases to cover different collection format

* add space params to retrofit 1.x

* add space params to retrofit 2.x

* rename url to localVarUrl

* fix exception in haskell servant

samples/client/petstore/javascript-promise/src/api/FakeApi.js

@@ -782,6 +782,97 @@
           return response_and_data.data;
         });
     }
+
+
+    /**
+     * To test the collection format in query parameters
+     * @param {Array.<String>} pipe 
+     * @param {Array.<String>} ioutil 
+     * @param {Array.<String>} http 
+     * @param {Array.<String>} url 
+     * @param {Array.<String>} context 
+     * @return {Promise} a {@link https://www.promisejs.org/|Promise}, with an object containing HTTP response
+     */
+    this.testQueryParameterCollectionFormatWithHttpInfo = function(pipe, ioutil, http, url, context) {
+      var postBody = null;
+      // verify the required parameter 'pipe' is set
+      if (pipe === undefined || pipe === null) {
+        throw new Error("Missing the required parameter 'pipe' when calling testQueryParameterCollectionFormat");
+      }
+      // verify the required parameter 'ioutil' is set
+      if (ioutil === undefined || ioutil === null) {
+        throw new Error("Missing the required parameter 'ioutil' when calling testQueryParameterCollectionFormat");
+      }
+      // verify the required parameter 'http' is set
+      if (http === undefined || http === null) {
+        throw new Error("Missing the required parameter 'http' when calling testQueryParameterCollectionFormat");
+      }
+      // verify the required parameter 'url' is set
+      if (url === undefined || url === null) {
+        throw new Error("Missing the required parameter 'url' when calling testQueryParameterCollectionFormat");
+      }
+      // verify the required parameter 'context' is set
+      if (context === undefined || context === null) {
+        throw new Error("Missing the required parameter 'context' when calling testQueryParameterCollectionFormat");
+      }
+
+      var pathParams = {
+      };
+      var queryParams = {
+      };
+      var collectionQueryParams = {
+        'pipe': {
+          value: pipe,
+          collectionFormat: 'csv'
+        },
+        'ioutil': {
+          value: ioutil,
+          collectionFormat: 'csv'
+        },
+        'http': {
+          value: http,
+          collectionFormat: 'space'
+        },
+        'url': {
+          value: url,
+          collectionFormat: 'csv'
+        },
+        'context': {
+          value: context,
+          collectionFormat: 'multi'
+        },
+      };
+      var headerParams = {
+      };
+      var formParams = {
+      };
+
+      var authNames = [];
+      var contentTypes = [];
+      var accepts = [];
+      var returnType = null;
+      return this.apiClient.callApi(
+        '/fake/test-query-paramters', 'PUT',
+        pathParams, queryParams, collectionQueryParams, headerParams, formParams, postBody,
+        authNames, contentTypes, accepts, returnType, null
+      );
+    }
+
+    /**
+     * To test the collection format in query parameters
+     * @param {Array.<String>} pipe 
+     * @param {Array.<String>} ioutil 
+     * @param {Array.<String>} http 
+     * @param {Array.<String>} url 
+     * @param {Array.<String>} context 
+     * @return {Promise} a {@link https://www.promisejs.org/|Promise}
+     */
+    this.testQueryParameterCollectionFormat = function(pipe, ioutil, http, url, context) {
+      return this.testQueryParameterCollectionFormatWithHttpInfo(pipe, ioutil, http, url, context)
+        .then(function(response_and_data) {
+          return response_and_data.data;
+        });
+    }
   };
 
   return exports;