[cpp-restsdk] Generate mockable APIs (#595)

* Port GMock feature from NativeInstruments

swagger-codegen fork:
NativeInstruments/swagger-codegen#9

* Update petstore for Mockable APIs

* Fix shared_ptr in templates for File params

* Add guards in templates for GMock APIs

* Regenerate samples without GMocks

* Add useful constructors for GMock APIs

* Add constructors to API header interface

* Update samples with explicit monadic constructors

* Add default implementations for destructors

Author: Peaches491

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppRestSdkClientCodegen.java

@@ -49,6 +49,7 @@ public class CppRestSdkClientCodegen extends AbstractCppCodegen {
 
     public static final String DECLSPEC = "declspec";
     public static final String DEFAULT_INCLUDE = "defaultInclude";
+    public static final String GENERATE_GMOCKS_FOR_APIS = "generateGMocksForApis";
 
     protected String packageVersion = "1.0.0";
     protected String declspec = "";
@@ -114,6 +115,9 @@ public CppRestSdkClientCodegen() {
         addOption(DEFAULT_INCLUDE,
                 "The default include statement that should be placed in all headers for including things like the declspec (convention: #include \"Commons.h\" ",
                 this.defaultInclude);
+        addOption(GENERATE_GMOCKS_FOR_APIS,
+                "Generate Google Mock classes for APIs.",
+                null);
 
         supportingFiles.add(new SupportingFile("modelbase-header.mustache", "", "ModelBase.h"));
         supportingFiles.add(new SupportingFile("modelbase-source.mustache", "", "ModelBase.cpp"));
@@ -177,6 +181,11 @@ public void processOpts() {
             defaultInclude = additionalProperties.get(DEFAULT_INCLUDE).toString();
         }
 
+        if (convertPropertyToBoolean(GENERATE_GMOCKS_FOR_APIS)) {
+            apiTemplateFiles.put("api-gmock.mustache", "GMock.h");
+            additionalProperties.put("gmockApis", "true");
+        }
+
         additionalProperties.put("modelNamespaceDeclarations", modelPackage.split("\\."));
         additionalProperties.put("modelNamespace", modelPackage.replaceAll("\\.", "::"));
         additionalProperties.put("modelHeaderGuardPrefix", modelPackage.replaceAll("\\.", "_").toUpperCase());

modules/openapi-generator/src/main/resources/cpp-rest-sdk-client/api-gmock.mustache

@@ -0,0 +1,41 @@
+{{>licenseInfo}}
+{{#operations}}
+#ifndef {{apiHeaderGuardPrefix}}_{{classname}}GMock_H_
+#define {{apiHeaderGuardPrefix}}_{{classname}}GMock_H_
+
+#include <gmock/gmock.h>
+
+#include "{{classname}}.h"
+
+{{#apiNamespaceDeclarations}}
+namespace {{this}} {
+{{/apiNamespaceDeclarations}}
+
+using namespace {{modelNamespace}};
+
+
+class {{declspec}} {{classname}}Mock : public I{{classname}}
+{
+public:
+    using Base = I{{classname}};
+
+    {{classname}}Mock() = default;
+    explicit {{classname}}Mock( std::shared_ptr<ApiClient> apiClient ) { };
+    ~{{classname}}Mock() override = default;
+
+    {{#operation}}
+    MOCK_METHOD{{allParams.size}}( {{operationId}}, pplx::task<{{#returnType}}{{{returnType}}}{{/returnType}}{{^returnType}}void{{/returnType}}> (
+        {{#allParams}}
+        {{^required}}boost::optional<{{/required}}{{#isFile}}std::shared_ptr<{{/isFile}}{{{dataType}}}{{#isFile}}>{{/isFile}}{{^required}}>{{/required}} {{paramName}}{{#hasMore}},{{/hasMore}}
+        {{/allParams}}
+    ) );
+    {{/operation}}
+};
+
+{{#apiNamespaceDeclarations}}
+}
+{{/apiNamespaceDeclarations}}
+
+#endif /* {{apiHeaderGuardPrefix}}_{{classname}}GMock_H_ */
+
+{{/operations}}

modules/openapi-generator/src/main/resources/cpp-rest-sdk-client/api-header.mustache

@@ -22,11 +22,38 @@ namespace {{this}} {
 
 using namespace {{modelNamespace}};
 
-class {{declspec}} {{classname}}
+{{#gmockApis}}
+class {{declspec}} I{{classname}}
 {
 public:
-    {{classname}}( std::shared_ptr<ApiClient> apiClient );
-    virtual ~{{classname}}();
+    I{{classname}}() = default;
+    virtual ~I{{classname}}() = default;
+
+    {{#operation}}
+    virtual pplx::task<{{#returnType}}{{{returnType}}}{{/returnType}}{{^returnType}}void{{/returnType}}> {{operationId}}(
+        {{#allParams}}
+        {{^required}}boost::optional<{{/required}}{{#isFile}}std::shared_ptr<{{/isFile}}{{{dataType}}}{{#isFile}}>{{/isFile}}{{^required}}>{{/required}} {{paramName}}{{#hasMore}},{{/hasMore}}
+        {{/allParams}}
+    ) = 0;
+    {{/operation}}
+};{{/gmockApis}}
+
+class {{declspec}} {{classname}} {{#gmockApis}} : public I{{classname}} {{/gmockApis}}
+{
+public:
+    {{#gmockApis}}
+    using Base = I{{classname}};
+    {{/gmockApis}}
+
+    explicit {{classname}}( std::shared_ptr<ApiClient> apiClient );
+
+    {{#gmockApis}}
+    ~{{classname}}() override;
+    {{/gmockApis}}
+    {{^gmockApis}}
+    virtual ~{{classname}}() = default;
+    {{/gmockApis}}
+
     {{#operation}}
     /// <summary>
     /// {{summary}}
@@ -41,7 +68,7 @@ public:
         {{#allParams}}
         {{^required}}boost::optional<{{/required}}{{#isFile}}std::shared_ptr<{{/isFile}}{{{dataType}}}{{#isFile}}>{{/isFile}}{{^required}}>{{/required}} {{paramName}}{{#hasMore}},{{/hasMore}}
         {{/allParams}}
-    );
+    ){{#gmockApis}} override{{/gmockApis}};
     {{/operation}}
 
 protected:

samples/client/petstore/cpp-restsdk/.openapi-generator/VERSION

@@ -1 +1 @@
-3.0.0-SNAPSHOT
+3.1.1-SNAPSHOT

samples/client/petstore/cpp-restsdk/ApiClient.cpp

@@ -4,7 +4,7 @@
  *
  * OpenAPI spec version: 1.0.0
  *
- * NOTE: This class is auto generated by OpenAPI-Generator 3.0.0-SNAPSHOT.
+ * NOTE: This class is auto generated by OpenAPI-Generator 3.1.1-SNAPSHOT.
  * https://openapi-generator.tech
  * Do not edit the class manually.
  */

samples/client/petstore/cpp-restsdk/ApiClient.h

@@ -4,7 +4,7 @@
  *
  * OpenAPI spec version: 1.0.0
  *
- * NOTE: This class is auto generated by OpenAPI-Generator 3.0.0-SNAPSHOT.
+ * NOTE: This class is auto generated by OpenAPI-Generator 3.1.1-SNAPSHOT.
  * https://openapi-generator.tech
  * Do not edit the class manually.
  */

samples/client/petstore/cpp-restsdk/ApiConfiguration.cpp

@@ -4,7 +4,7 @@
  *
  * OpenAPI spec version: 1.0.0
  *
- * NOTE: This class is auto generated by OpenAPI-Generator 3.0.0-SNAPSHOT.
+ * NOTE: This class is auto generated by OpenAPI-Generator 3.1.1-SNAPSHOT.
  * https://openapi-generator.tech
  * Do not edit the class manually.
  */

samples/client/petstore/cpp-restsdk/ApiConfiguration.h

@@ -4,7 +4,7 @@
  *
  * OpenAPI spec version: 1.0.0
  *
- * NOTE: This class is auto generated by OpenAPI-Generator 3.0.0-SNAPSHOT.
+ * NOTE: This class is auto generated by OpenAPI-Generator 3.1.1-SNAPSHOT.
  * https://openapi-generator.tech
  * Do not edit the class manually.
  */

samples/client/petstore/cpp-restsdk/ApiException.cpp

@@ -4,7 +4,7 @@
  *
  * OpenAPI spec version: 1.0.0
  *
- * NOTE: This class is auto generated by OpenAPI-Generator 3.0.0-SNAPSHOT.
+ * NOTE: This class is auto generated by OpenAPI-Generator 3.1.1-SNAPSHOT.
  * https://openapi-generator.tech
  * Do not edit the class manually.
  */

samples/client/petstore/cpp-restsdk/ApiException.h

@@ -4,7 +4,7 @@
  *
  * OpenAPI spec version: 1.0.0
  *
- * NOTE: This class is auto generated by OpenAPI-Generator 3.0.0-SNAPSHOT.
+ * NOTE: This class is auto generated by OpenAPI-Generator 3.1.1-SNAPSHOT.
  * https://openapi-generator.tech
  * Do not edit the class manually.
  */