diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java
index a5bab8b9c62..4ca1429b2a1 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java
@@ -87,7 +87,7 @@ public class CLibcurlClientCodegen extends DefaultCodegen implements CodegenConf
         embeddedTemplateDir = templateDir = "C-libcurl";
 
         // TODO add auto-generated test files
-        //modelTestTemplateFiles.put("model_test.mustache", ".c");
+        modelTestTemplateFiles.put("model_test.mustache", ".c");
         //apiTestTemplateFiles.put("api_test.mustache", ".c");
 
         // default HIDE_GENERATION_TIMESTAMP to true
@@ -321,6 +321,104 @@ public class CLibcurlClientCodegen extends DefaultCodegen implements CodegenConf
         return null;
     }
 
+    @Override
+    public String toExampleValue(Schema schema) {
+        String example = super.toExampleValue(schema);
+
+        if (ModelUtils.isNullType(schema) && null != example) {
+            // The 'null' type is allowed in OAS 3.1 and above. It is not supported by OAS 3.0.x,
+            // though this tooling supports it.
+            return "NULL";
+        }
+        // correct "'"s into "'"s after toString()
+        if (ModelUtils.isStringSchema(schema) && schema.getDefault() != null) {
+            example = (String) schema.getDefault();
+        }
+        if (StringUtils.isNotBlank(example) && !"null".equals(example)) {
+            if (ModelUtils.isStringSchema(schema)) {
+                example = "\"" + example + "\"";
+            }
+            return example;
+        }
+
+        if (schema.getEnum() != null && !schema.getEnum().isEmpty()) {
+        // Enum case:
+            example = schema.getEnum().get(0).toString();
+/*            if (ModelUtils.isStringSchema(schema)) {
+                example = "'" + escapeText(example) + "'";
+            }*/
+            if (null == example)
+                LOGGER.warn("Empty enum. Cannot built an example!");
+
+            return example;
+        } else if (null != schema.get$ref()) {
+        // $ref case:
+            Map<String, Schema> allDefinitions = ModelUtils.getSchemas(this.openAPI);
+            String ref = ModelUtils.getSimpleRef(schema.get$ref());
+            if (allDefinitions != null) {
+                Schema refSchema = allDefinitions.get(ref);
+                if (null == refSchema) {
+                    return "None";
+                } else {
+                    String refTitle = refSchema.getTitle();
+                    if (StringUtils.isBlank(refTitle) || "null".equals(refTitle)) {
+                        refSchema.setTitle(ref);
+                    }
+                    return toExampleValue(refSchema);
+                }
+            } else {
+                LOGGER.warn("allDefinitions not defined in toExampleValue!\n");
+            }
+        }
+        if (ModelUtils.isDateSchema(schema)) {
+            example = "\"2013-10-20\"";
+            return example;
+        } else if (ModelUtils.isDateTimeSchema(schema)) {
+            example = "\"2013-10-20T19:20:30+01:00\"";
+            return example;
+        } else if (ModelUtils.isBinarySchema(schema)) {
+            example = "bytes(b'blah')";
+            return example;
+        } else if (ModelUtils.isByteArraySchema(schema)) {
+            example = "YQ==";
+        } else if (ModelUtils.isStringSchema(schema)) {
+            // a BigDecimal:
+            if ("Number".equalsIgnoreCase(schema.getFormat())) {return "1";}
+            if (StringUtils.isNotBlank(schema.getPattern())) return "'a'"; // I cheat here, since it would be too complicated to generate a string from a regexp
+            int len = 0;
+            if (null != schema.getMinLength()) len = schema.getMinLength().intValue();
+            if (len < 1) len = 1;
+            example = "";
+            for (int i=0;i<len;i++) example += i;
+        } else if (ModelUtils.isIntegerSchema(schema)) {
+            if (schema.getMinimum() != null)
+                example = schema.getMinimum().toString();
+            else
+                example = "56";
+        } else if (ModelUtils.isNumberSchema(schema)) {
+            if (schema.getMinimum() != null)
+                example = schema.getMinimum().toString();
+            else
+                example = "1.337";
+        } else if (ModelUtils.isBooleanSchema(schema)) {
+            example = "1";
+        } else if (ModelUtils.isArraySchema(schema)) {
+            example = "list_create()";
+        } else if (ModelUtils.isMapSchema(schema)) {
+            example = "list_create()";
+        } else if (ModelUtils.isObjectSchema(schema)) {
+            return null; // models are managed at moustache level
+        } else {
+            LOGGER.warn("Type " + schema.getType() + " not handled properly in toExampleValue");
+        }
+
+        if (ModelUtils.isStringSchema(schema)) {
+            example = "\"" + escapeText(example) + "\"";
+        }
+
+        return example;
+    }
+
     @Override
     public String getSchemaType(Schema schema) {
         String openAPIType = super.getSchemaType(schema);
@@ -431,7 +529,7 @@ public class CLibcurlClientCodegen extends DefaultCodegen implements CodegenConf
 
     @Override
     public String toModelTestFilename(String name) {
-        return ("test_" + toModelFilename(name)).replaceAll("_", "-");
+        return ("test_" + toModelFilename(name));
     }
 
     @Override
diff --git a/modules/openapi-generator/src/main/resources/C-libcurl/model-header.mustache b/modules/openapi-generator/src/main/resources/C-libcurl/model-header.mustache
index 03a03276f66..5618c306da6 100644
--- a/modules/openapi-generator/src/main/resources/C-libcurl/model-header.mustache
+++ b/modules/openapi-generator/src/main/resources/C-libcurl/model-header.mustache
@@ -11,6 +11,9 @@
 #include "../external/cJSON.h"
 #include "../include/list.h"
 #include "../include/keyValuePair.h"
+
+typedef struct {{classname}}_t {{classname}}_t;
+
 {{#imports}}
 #include "{{{.}}}.h"
 {{/imports}}
diff --git a/modules/openapi-generator/src/main/resources/C-libcurl/model_test.mustache b/modules/openapi-generator/src/main/resources/C-libcurl/model_test.mustache
index 2f17b588076..77e338bea5f 100644
--- a/modules/openapi-generator/src/main/resources/C-libcurl/model_test.mustache
+++ b/modules/openapi-generator/src/main/resources/C-libcurl/model_test.mustache
@@ -1,11 +1,74 @@
+{{#models}}
+{{#model}}
+#ifndef {{classFilename}}_TEST
+#define {{classFilename}}_TEST
+
+// the following is to include only the main from the first c file
+#ifndef TEST_MAIN
+#define TEST_MAIN
+#define {{classFilename}}_MAIN
+#endif // TEST_MAIN
+
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
-#include "cJSON.h"
-{{#imports}}{{{import}}}
-{{/imports}}
+#include <stdbool.h>
+#include "../external/cJSON.h"
+
+#include "../model/{{classFilename}}.h"
+{{classname}}_t* instantiate_{{classname}}(int include_optional);
+
+{{#vars}}{{#isModel}}{{#isEnum}}
+// it is enum. Work in Progress
+{{/isEnum}}{{^isEnum}}#include "test_{{{dataType}}}.c"
+{{/isEnum}}{{/isModel}}{{/vars}}
+
+{{classname}}_t* instantiate_{{classname}}(int include_optional) {
+  {{classname}}_t* {{classname}} = NULL;
+  if (include_optional) {
+    {{classname}} = {{classname}}_create(
+{{#vars}}      {{#isEnum}}{{^isContainer}}{{#example}}{{projectName}}_{{classVarName}}_{{enumName}}_{{{.}}}{{/example}}{{/isContainer}}{{#isContainer}}{{#example}}{{{.}}}{{/example}}{{/isContainer}}{{/isEnum}}{{^isEnum}}{{#example}}{{{.}}}{{/example}}{{/isEnum}}{{^example}}{{#isModel}}{{#isEnum}}// enum {{datatypeWithEnum}}_e Work in Progress
+{{/isEnum}}{{^isEnum}} // false, not to have infinite recursion
+      instantiate_{{{dataType}}}(0){{/isEnum}}{{/isModel}}{{^isModel}}0{{/isModel}}{{/example}}{{#hasMore}},{{/hasMore}}
+{{/vars}}
+    );
+  } else {
+    {{classname}} = {{classname}}_create(
+{{#vars}}      {{#isEnum}}{{^isContainer}}{{#example}}{{projectName}}_{{classVarName}}_{{enumName}}_{{{.}}}{{/example}}{{/isContainer}}{{#isContainer}}{{#example}}{{{.}}}{{/example}}{{/isContainer}}{{/isEnum}}{{^isEnum}}{{#example}}{{{.}}}{{/example}}{{/isEnum}}{{^example}}{{#isModel}}{{#isEnum}}// enum {{datatypeWithEnum}}_e Work in Progress
+{{/isEnum}}{{^isEnum}}NULL{{/isEnum}}{{/isModel}}{{^isModel}}0{{/isModel}}{{/example}}{{#hasMore}},{{/hasMore}}
+{{/vars}}
+    );
+  }
+
+  return {{classname}};
+}
+
+
+#ifdef {{classFilename}}_MAIN
+
+void test_{{classname}}(int include_optional) {
+    {{classname}}_t* {{classname}}_1 = instantiate_{{classname}}(include_optional);
+
+	cJSON* json{{classname}}_1 = {{classname}}_convertToJSON({{classname}}_1);
+	printf("{{classname}} :\n%s\n", cJSON_Print(json{{classname}}_1));
+	{{classname}}_t* {{classname}}_2 = {{classname}}_parseFromJSON(json{{classname}}_1);
+	cJSON* json{{classname}}_2 = {{classname}}_convertToJSON({{classname}}_2);
+	printf("repeating {{classname}}:\n%s\n", cJSON_Print(json{{classname}}_2));
+}
 
 int main() {
-printf("Hello world \n");
+{{#models}}
+{{#model}}
+  test_{{classname}}(1);
+  test_{{classname}}(0);
+{{/model}}
+{{/models}}
 
+  printf("Hello world \n");
+  return 0;
 }
+
+#endif // {{classFilename}}_MAIN
+#endif // {{classFilename}}_TEST
+{{/model}}
+{{/models}}
diff --git a/samples/client/petstore/c/model/api_response.h b/samples/client/petstore/c/model/api_response.h
index 0b0866e3d5a..a829cd22443 100644
--- a/samples/client/petstore/c/model/api_response.h
+++ b/samples/client/petstore/c/model/api_response.h
@@ -12,6 +12,9 @@
 #include "../include/list.h"
 #include "../include/keyValuePair.h"
 
+typedef struct api_response_t api_response_t;
+
+
 
 
 typedef struct api_response_t {
diff --git a/samples/client/petstore/c/model/category.h b/samples/client/petstore/c/model/category.h
index e63a04e096c..2e858c71e18 100644
--- a/samples/client/petstore/c/model/category.h
+++ b/samples/client/petstore/c/model/category.h
@@ -12,6 +12,9 @@
 #include "../include/list.h"
 #include "../include/keyValuePair.h"
 
+typedef struct category_t category_t;
+
+
 
 
 typedef struct category_t {
diff --git a/samples/client/petstore/c/model/order.h b/samples/client/petstore/c/model/order.h
index d0983603421..f1e9f47dd43 100644
--- a/samples/client/petstore/c/model/order.h
+++ b/samples/client/petstore/c/model/order.h
@@ -12,6 +12,9 @@
 #include "../include/list.h"
 #include "../include/keyValuePair.h"
 
+typedef struct order_t order_t;
+
+
 // Enum STATUS for order
 
 typedef enum  { openapi_petstore_order_STATUS_NULL = 0, openapi_petstore_order_STATUS_placed, openapi_petstore_order_STATUS_approved, openapi_petstore_order_STATUS_delivered } openapi_petstore_order_STATUS_e;
diff --git a/samples/client/petstore/c/model/pet.h b/samples/client/petstore/c/model/pet.h
index bced36bcdf2..70103c7c3aa 100644
--- a/samples/client/petstore/c/model/pet.h
+++ b/samples/client/petstore/c/model/pet.h
@@ -11,6 +11,9 @@
 #include "../external/cJSON.h"
 #include "../include/list.h"
 #include "../include/keyValuePair.h"
+
+typedef struct pet_t pet_t;
+
 #include "category.h"
 #include "tag.h"
 
diff --git a/samples/client/petstore/c/model/tag.h b/samples/client/petstore/c/model/tag.h
index 26f70686658..7edf903ecf7 100644
--- a/samples/client/petstore/c/model/tag.h
+++ b/samples/client/petstore/c/model/tag.h
@@ -12,6 +12,9 @@
 #include "../include/list.h"
 #include "../include/keyValuePair.h"
 
+typedef struct tag_t tag_t;
+
+
 
 
 typedef struct tag_t {
diff --git a/samples/client/petstore/c/model/user.h b/samples/client/petstore/c/model/user.h
index 28ad882941b..d0d5ea97c4a 100644
--- a/samples/client/petstore/c/model/user.h
+++ b/samples/client/petstore/c/model/user.h
@@ -12,6 +12,9 @@
 #include "../include/list.h"
 #include "../include/keyValuePair.h"
 
+typedef struct user_t user_t;
+
+
 
 
 typedef struct user_t {
diff --git a/samples/client/petstore/c/unit-test/test_api_response.c b/samples/client/petstore/c/unit-test/test_api_response.c
new file mode 100644
index 00000000000..3ecd4442db1
--- /dev/null
+++ b/samples/client/petstore/c/unit-test/test_api_response.c
@@ -0,0 +1,62 @@
+#ifndef api_response_TEST
+#define api_response_TEST
+
+// the following is to include only the main from the first c file
+#ifndef TEST_MAIN
+#define TEST_MAIN
+#define api_response_MAIN
+#endif // TEST_MAIN
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include "../external/cJSON.h"
+
+#include "../model/api_response.h"
+api_response_t* instantiate_api_response(int include_optional);
+
+
+
+api_response_t* instantiate_api_response(int include_optional) {
+  api_response_t* api_response = NULL;
+  if (include_optional) {
+    api_response = api_response_create(
+      56,
+      "0",
+      "0"
+    );
+  } else {
+    api_response = api_response_create(
+      56,
+      "0",
+      "0"
+    );
+  }
+
+  return api_response;
+}
+
+
+#ifdef api_response_MAIN
+
+void test_api_response(int include_optional) {
+    api_response_t* api_response_1 = instantiate_api_response(include_optional);
+
+	cJSON* jsonapi_response_1 = api_response_convertToJSON(api_response_1);
+	printf("api_response :\n%s\n", cJSON_Print(jsonapi_response_1));
+	api_response_t* api_response_2 = api_response_parseFromJSON(jsonapi_response_1);
+	cJSON* jsonapi_response_2 = api_response_convertToJSON(api_response_2);
+	printf("repeating api_response:\n%s\n", cJSON_Print(jsonapi_response_2));
+}
+
+int main() {
+  test_api_response(1);
+  test_api_response(0);
+
+  printf("Hello world \n");
+  return 0;
+}
+
+#endif // api_response_MAIN
+#endif // api_response_TEST
diff --git a/samples/client/petstore/c/unit-test/test_category.c b/samples/client/petstore/c/unit-test/test_category.c
new file mode 100644
index 00000000000..3865dd03b0b
--- /dev/null
+++ b/samples/client/petstore/c/unit-test/test_category.c
@@ -0,0 +1,60 @@
+#ifndef category_TEST
+#define category_TEST
+
+// the following is to include only the main from the first c file
+#ifndef TEST_MAIN
+#define TEST_MAIN
+#define category_MAIN
+#endif // TEST_MAIN
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include "../external/cJSON.h"
+
+#include "../model/category.h"
+category_t* instantiate_category(int include_optional);
+
+
+
+category_t* instantiate_category(int include_optional) {
+  category_t* category = NULL;
+  if (include_optional) {
+    category = category_create(
+      56,
+      "0"
+    );
+  } else {
+    category = category_create(
+      56,
+      "0"
+    );
+  }
+
+  return category;
+}
+
+
+#ifdef category_MAIN
+
+void test_category(int include_optional) {
+    category_t* category_1 = instantiate_category(include_optional);
+
+	cJSON* jsoncategory_1 = category_convertToJSON(category_1);
+	printf("category :\n%s\n", cJSON_Print(jsoncategory_1));
+	category_t* category_2 = category_parseFromJSON(jsoncategory_1);
+	cJSON* jsoncategory_2 = category_convertToJSON(category_2);
+	printf("repeating category:\n%s\n", cJSON_Print(jsoncategory_2));
+}
+
+int main() {
+  test_category(1);
+  test_category(0);
+
+  printf("Hello world \n");
+  return 0;
+}
+
+#endif // category_MAIN
+#endif // category_TEST
diff --git a/samples/client/petstore/c/unit-test/test_order.c b/samples/client/petstore/c/unit-test/test_order.c
new file mode 100644
index 00000000000..2d46d50c110
--- /dev/null
+++ b/samples/client/petstore/c/unit-test/test_order.c
@@ -0,0 +1,68 @@
+#ifndef order_TEST
+#define order_TEST
+
+// the following is to include only the main from the first c file
+#ifndef TEST_MAIN
+#define TEST_MAIN
+#define order_MAIN
+#endif // TEST_MAIN
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include "../external/cJSON.h"
+
+#include "../model/order.h"
+order_t* instantiate_order(int include_optional);
+
+
+
+order_t* instantiate_order(int include_optional) {
+  order_t* order = NULL;
+  if (include_optional) {
+    order = order_create(
+      56,
+      56,
+      56,
+      "2013-10-20T19:20:30+01:00",
+      openapi_petstore_order_STATUS_placed,
+      1
+    );
+  } else {
+    order = order_create(
+      56,
+      56,
+      56,
+      "2013-10-20T19:20:30+01:00",
+      openapi_petstore_order_STATUS_placed,
+      1
+    );
+  }
+
+  return order;
+}
+
+
+#ifdef order_MAIN
+
+void test_order(int include_optional) {
+    order_t* order_1 = instantiate_order(include_optional);
+
+	cJSON* jsonorder_1 = order_convertToJSON(order_1);
+	printf("order :\n%s\n", cJSON_Print(jsonorder_1));
+	order_t* order_2 = order_parseFromJSON(jsonorder_1);
+	cJSON* jsonorder_2 = order_convertToJSON(order_2);
+	printf("repeating order:\n%s\n", cJSON_Print(jsonorder_2));
+}
+
+int main() {
+  test_order(1);
+  test_order(0);
+
+  printf("Hello world \n");
+  return 0;
+}
+
+#endif // order_MAIN
+#endif // order_TEST
diff --git a/samples/client/petstore/c/unit-test/test_pet.c b/samples/client/petstore/c/unit-test/test_pet.c
new file mode 100644
index 00000000000..ba45422f912
--- /dev/null
+++ b/samples/client/petstore/c/unit-test/test_pet.c
@@ -0,0 +1,70 @@
+#ifndef pet_TEST
+#define pet_TEST
+
+// the following is to include only the main from the first c file
+#ifndef TEST_MAIN
+#define TEST_MAIN
+#define pet_MAIN
+#endif // TEST_MAIN
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include "../external/cJSON.h"
+
+#include "../model/pet.h"
+pet_t* instantiate_pet(int include_optional);
+
+#include "test_category.c"
+
+
+pet_t* instantiate_pet(int include_optional) {
+  pet_t* pet = NULL;
+  if (include_optional) {
+    pet = pet_create(
+      56,
+       // false, not to have infinite recursion
+      instantiate_category(0),
+      "doggie",
+      list_create(),
+      list_create(),
+      openapi_petstore_pet_STATUS_available
+    );
+  } else {
+    pet = pet_create(
+      56,
+      NULL,
+      "doggie",
+      list_create(),
+      list_create(),
+      openapi_petstore_pet_STATUS_available
+    );
+  }
+
+  return pet;
+}
+
+
+#ifdef pet_MAIN
+
+void test_pet(int include_optional) {
+    pet_t* pet_1 = instantiate_pet(include_optional);
+
+	cJSON* jsonpet_1 = pet_convertToJSON(pet_1);
+	printf("pet :\n%s\n", cJSON_Print(jsonpet_1));
+	pet_t* pet_2 = pet_parseFromJSON(jsonpet_1);
+	cJSON* jsonpet_2 = pet_convertToJSON(pet_2);
+	printf("repeating pet:\n%s\n", cJSON_Print(jsonpet_2));
+}
+
+int main() {
+  test_pet(1);
+  test_pet(0);
+
+  printf("Hello world \n");
+  return 0;
+}
+
+#endif // pet_MAIN
+#endif // pet_TEST
diff --git a/samples/client/petstore/c/unit-test/test_tag.c b/samples/client/petstore/c/unit-test/test_tag.c
new file mode 100644
index 00000000000..f6deb914e70
--- /dev/null
+++ b/samples/client/petstore/c/unit-test/test_tag.c
@@ -0,0 +1,60 @@
+#ifndef tag_TEST
+#define tag_TEST
+
+// the following is to include only the main from the first c file
+#ifndef TEST_MAIN
+#define TEST_MAIN
+#define tag_MAIN
+#endif // TEST_MAIN
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include "../external/cJSON.h"
+
+#include "../model/tag.h"
+tag_t* instantiate_tag(int include_optional);
+
+
+
+tag_t* instantiate_tag(int include_optional) {
+  tag_t* tag = NULL;
+  if (include_optional) {
+    tag = tag_create(
+      56,
+      "0"
+    );
+  } else {
+    tag = tag_create(
+      56,
+      "0"
+    );
+  }
+
+  return tag;
+}
+
+
+#ifdef tag_MAIN
+
+void test_tag(int include_optional) {
+    tag_t* tag_1 = instantiate_tag(include_optional);
+
+	cJSON* jsontag_1 = tag_convertToJSON(tag_1);
+	printf("tag :\n%s\n", cJSON_Print(jsontag_1));
+	tag_t* tag_2 = tag_parseFromJSON(jsontag_1);
+	cJSON* jsontag_2 = tag_convertToJSON(tag_2);
+	printf("repeating tag:\n%s\n", cJSON_Print(jsontag_2));
+}
+
+int main() {
+  test_tag(1);
+  test_tag(0);
+
+  printf("Hello world \n");
+  return 0;
+}
+
+#endif // tag_MAIN
+#endif // tag_TEST
diff --git a/samples/client/petstore/c/unit-test/test_user.c b/samples/client/petstore/c/unit-test/test_user.c
new file mode 100644
index 00000000000..d2a230b9cd7
--- /dev/null
+++ b/samples/client/petstore/c/unit-test/test_user.c
@@ -0,0 +1,72 @@
+#ifndef user_TEST
+#define user_TEST
+
+// the following is to include only the main from the first c file
+#ifndef TEST_MAIN
+#define TEST_MAIN
+#define user_MAIN
+#endif // TEST_MAIN
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include "../external/cJSON.h"
+
+#include "../model/user.h"
+user_t* instantiate_user(int include_optional);
+
+
+
+user_t* instantiate_user(int include_optional) {
+  user_t* user = NULL;
+  if (include_optional) {
+    user = user_create(
+      56,
+      "0",
+      "0",
+      "0",
+      "0",
+      "0",
+      "0",
+      56
+    );
+  } else {
+    user = user_create(
+      56,
+      "0",
+      "0",
+      "0",
+      "0",
+      "0",
+      "0",
+      56
+    );
+  }
+
+  return user;
+}
+
+
+#ifdef user_MAIN
+
+void test_user(int include_optional) {
+    user_t* user_1 = instantiate_user(include_optional);
+
+	cJSON* jsonuser_1 = user_convertToJSON(user_1);
+	printf("user :\n%s\n", cJSON_Print(jsonuser_1));
+	user_t* user_2 = user_parseFromJSON(jsonuser_1);
+	cJSON* jsonuser_2 = user_convertToJSON(user_2);
+	printf("repeating user:\n%s\n", cJSON_Print(jsonuser_2));
+}
+
+int main() {
+  test_user(1);
+  test_user(0);
+
+  printf("Hello world \n");
+  return 0;
+}
+
+#endif // user_MAIN
+#endif // user_TEST