[go-server] Fix: missing quotes for string default value (OpenAPITools#18546)

* Update controller mustache

* Add tests to openapi doc

* Regen

Author: lwj5

modules/openapi-generator/src/main/resources/go-server/controller-api.mustache

@@ -520,7 +520,7 @@ func (c *{{classname}}Controller) {{nickname}}(w http.ResponseWriter, r *http.Re
 		{{/required}}
 		{{^required}}
 		{{#defaultValue}}
-		param := {{^isString}}{{dataType}}({{/isString}}{{defaultValue}}{{^isString}}){{/isString}}
+		param := {{^isString}}{{dataType}}({{/isString}}"{{defaultValue}}"{{^isString}}){{/isString}}
 		{{paramName}}Param = {{#isNullable}}&{{/isNullable}}param
 		{{/defaultValue}}
 		{{/required}}

modules/openapi-generator/src/test/resources/3_0/go-server/petstore.yaml

@@ -100,6 +100,21 @@ paths:
               - "OPTION_1"
               - "OPTION_2"
               - "OPTION_3"
+        - name: defaultInt
+          in: query
+          schema:
+            default: 1
+            type: integer
+        - name: defaultNum
+          in: query
+          schema:
+            default: 1.5
+            type: number
+        - name: defaultStr
+          in: query
+          schema:
+            default: default
+            type: string
         - name: status
           in: query
           description: Status values that need to be considered for filter
@@ -616,9 +631,9 @@ paths:
           required: true
           schema:
             type: string
-        - name: boolean_test
+        - name: remember_me
           in: query
-          description: The password for login in clear text
+          description: Remember Me
           schema:
             type: boolean
       responses:
@@ -731,9 +746,9 @@ paths:
           required: true
           schema:
             type: string
-        - name: boolean_test # to ensure boolean query parameter won't cause compilation errors
+        - name: confirmation # to ensure boolean query parameter won't cause compilation errors
           in: query
-          description: boolean query parameter
+          description: Confirm the deletion
           schema:
             type: boolean
       responses:

samples/server/petstore/go-api-server/api/openapi.yaml

@@ -105,6 +105,30 @@ paths:
           - OPTION_3
           type: string
         style: form
+      - explode: true
+        in: query
+        name: defaultInt
+        required: false
+        schema:
+          default: 1
+          type: integer
+        style: form
+      - explode: true
+        in: query
+        name: defaultNum
+        required: false
+        schema:
+          default: 1.5
+          type: number
+        style: form
+      - explode: true
+        in: query
+        name: defaultStr
+        required: false
+        schema:
+          default: default
+          type: string
+        style: form
       - deprecated: true
         description: Status values that need to be considered for filter
         explode: false
@@ -631,10 +655,10 @@ paths:
         schema:
           type: string
         style: form
-      - description: The password for login in clear text
+      - description: Remember Me
         explode: true
         in: query
-        name: boolean_test
+        name: remember_me
         required: false
         schema:
           type: boolean
@@ -702,10 +726,10 @@ paths:
         schema:
           type: string
         style: simple
-      - description: boolean query parameter
+      - description: Confirm the deletion
         explode: true
         in: query
-        name: boolean_test
+        name: confirmation
         required: false
         schema:
           type: boolean

samples/server/petstore/go-api-server/go/api.go

@@ -105,6 +105,30 @@ paths:
           - OPTION_3
           type: string
         style: form
+      - explode: true
+        in: query
+        name: defaultInt
+        required: false
+        schema:
+          default: 1
+          type: integer
+        style: form
+      - explode: true
+        in: query
+        name: defaultNum
+        required: false
+        schema:
+          default: 1.5
+          type: number
+        style: form
+      - explode: true
+        in: query
+        name: defaultStr
+        required: false
+        schema:
+          default: default
+          type: string
+        style: form
       - deprecated: true
         description: Status values that need to be considered for filter
         explode: false
@@ -631,10 +655,10 @@ paths:
         schema:
           type: string
         style: form
-      - description: The password for login in clear text
+      - description: Remember Me
         explode: true
         in: query
-        name: boolean_test
+        name: remember_me
         required: false
         schema:
           type: boolean
@@ -702,10 +726,10 @@ paths:
         schema:
           type: string
         style: simple
-      - description: boolean query parameter
+      - description: Confirm the deletion
         explode: true
         in: query
-        name: boolean_test
+        name: confirmation
         required: false
         schema:
           type: boolean