Update go samples with more tests, improve code format (#22593)

* update go samples with more tests

* fix indention

Author: wing328

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

@@ -217,16 +217,16 @@ func (a *{{{classname}}}Service) {{nickname}}Execute(r {{#structPrefix}}{{&class
 		parameterAddToHeaderOrQuery(localVarQueryParams, "{{{baseName}}}", r.{{paramName}}, "{{style}}", "{{collectionFormat}}")
 	{{/isCollectionFormatMulti}}
 	{{#defaultValue}}} else {
-    {{#isArray}}
-        var defaultValue {{{dataType}}} = {{{dataType}}}{{{.}}}
-        parameterAddToHeaderOrQuery(localVarQueryParams, "{{{baseName}}}", defaultValue, "{{style}}", "{{collectionFormat}}")
-        r.{{paramName}} = &defaultValue
-    {{/isArray}}
-    {{^isArray}}
-        var defaultValue {{{dataType}}} = {{{.}}}
-        parameterAddToHeaderOrQuery(localVarQueryParams, "{{{baseName}}}", defaultValue, "{{style}}", "{{collectionFormat}}")
-        r.{{paramName}} = &defaultValue
-    {{/isArray}}
+	{{#isArray}}
+		var defaultValue {{{dataType}}} = {{{dataType}}}{{{.}}}
+		parameterAddToHeaderOrQuery(localVarQueryParams, "{{{baseName}}}", defaultValue, "{{style}}", "{{collectionFormat}}")
+		r.{{paramName}} = &defaultValue
+	{{/isArray}}
+	{{^isArray}}
+		var defaultValue {{{dataType}}} = {{{.}}}
+		parameterAddToHeaderOrQuery(localVarQueryParams, "{{{baseName}}}", defaultValue, "{{style}}", "{{collectionFormat}}")
+		r.{{paramName}} = &defaultValue
+	{{/isArray}}
 	{{/defaultValue}}}
 	{{/required}}
 	{{/queryParams}}

modules/openapi-generator/src/test/resources/3_0/go/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml

@@ -1308,6 +1308,40 @@ paths:
             application/json:
               schema:
                 type: object
+  /fake/query-array-with-default-values:
+    post:
+      tags:
+        - fake
+      summary: to test query array with default values
+      operationId: query_array_with_default_values
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: string
+      parameters:
+        - name: "arrayparam"
+          in: query
+          schema:
+            type: array
+            items:
+              type: string
+            default: ["test1", "test2"]
+        - name: "enumarrayparam"
+          in: query
+          schema:
+            type: array
+            items:
+              $ref: "#/components/schemas/ExampleEnum"
+            default: ["example1"]
+        - name: "stringparam"
+          in: query
+          schema:
+            type: string
+            default: "test3"
+      responses:
+        200:
+          description: Ok
 servers:
   - url: 'http://localhost/v2'
   - url: 'http://{server}.swagger.io:{port}/v2'
@@ -2306,3 +2340,8 @@ components:
         - type: array
           items:
             type: string
+    ExampleEnum:
+      type: string
+      enum:
+        - example1
+        - example2

samples/client/petstore/go/go-petstore/api_fake.go

@@ -38,6 +38,7 @@ docs/DuplicatedPropParent.md
 docs/EnumArrays.md
 docs/EnumClass.md
 docs/EnumTest.md
+docs/ExampleEnum.md
 docs/FakeAPI.md
 docs/FakeClassnameTags123API.md
 docs/File.md
@@ -123,6 +124,7 @@ model_duplicated_prop_parent.go
 model_enum_arrays.go
 model_enum_class.go
 model_enum_test_.go
+model_example_enum.go
 model_file.go
 model_file_schema_test_class.go
 model_filter_any.go

samples/openapi3/client/petstore/go/go-petstore/.openapi-generator/FILES

@@ -88,6 +88,7 @@ Class | Method | HTTP request | Description
 *FakeAPI* | [**FakeOuterNumberSerialize**](docs/FakeAPI.md#fakeouternumberserialize) | **Post** /fake/outer/number | 
 *FakeAPI* | [**FakeOuterStringSerialize**](docs/FakeAPI.md#fakeouterstringserialize) | **Post** /fake/outer/string | 
 *FakeAPI* | [**GetParameterNameMapping**](docs/FakeAPI.md#getparameternamemapping) | **Get** /fake/parameter-name-mapping | parameter name mapping test
+*FakeAPI* | [**QueryArrayWithDefaultValues**](docs/FakeAPI.md#queryarraywithdefaultvalues) | **Post** /fake/query-array-with-default-values | to test query array with default values
 *FakeAPI* | [**TestAdditionalPropertiesReference**](docs/FakeAPI.md#testadditionalpropertiesreference) | **Post** /fake/additionalProperties-reference | test referenced additionalProperties
 *FakeAPI* | [**TestBodyWithFileSchema**](docs/FakeAPI.md#testbodywithfileschema) | **Put** /fake/body-with-file-schema | 
 *FakeAPI* | [**TestBodyWithQueryParams**](docs/FakeAPI.md#testbodywithqueryparams) | **Put** /fake/body-with-query-params | 
@@ -154,6 +155,7 @@ Class | Method | HTTP request | Description
  - [EnumArrays](docs/EnumArrays.md)
  - [EnumClass](docs/EnumClass.md)
  - [EnumTest](docs/EnumTest.md)
+ - [ExampleEnum](docs/ExampleEnum.md)
  - [File](docs/File.md)
  - [FileSchemaTestClass](docs/FileSchemaTestClass.md)
  - [FilterAny](docs/FilterAny.md)

samples/openapi3/client/petstore/go/go-petstore/README.md

@@ -1267,6 +1267,52 @@ paths:
               schema:
                 type: object
           description: success
+  /fake/query-array-with-default-values:
+    post:
+      operationId: query_array_with_default_values
+      parameters:
+      - explode: true
+        in: query
+        name: arrayparam
+        required: false
+        schema:
+          default:
+          - test1
+          - test2
+          items:
+            type: string
+          type: array
+        style: form
+      - explode: true
+        in: query
+        name: enumarrayparam
+        required: false
+        schema:
+          default:
+          - example1
+          items:
+            $ref: "#/components/schemas/ExampleEnum"
+          type: array
+        style: form
+      - explode: true
+        in: query
+        name: stringparam
+        required: false
+        schema:
+          default: test3
+          type: string
+        style: form
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: string
+      responses:
+        "200":
+          description: Ok
+      summary: to test query array with default values
+      tags:
+      - fake
 components:
   requestBodies:
     UserArray:
@@ -2286,6 +2332,11 @@ components:
       - items:
           type: string
         type: array
+    ExampleEnum:
+      enum:
+      - example1
+      - example2
+      type: string
     _foo_get_default_response:
       example:
         string:

samples/openapi3/client/petstore/go/go-petstore/api/openapi.yaml

@@ -0,0 +1,13 @@
+# ExampleEnum
+
+## Enum
+
+
+* `EXAMPLE1` (value: `"example1"`)
+
+* `EXAMPLE2` (value: `"example2"`)
+
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+