Fixes test folder cleaning in python-exp only (#12825)

* Adds test folder file removal in python-exp only

* Samples regnerated

* Removes unused code, tweaks unit test sample to test PR change

* Reverts spec change

* FIxes javadoc

bin/generate-samples.sh

@@ -53,11 +53,7 @@ if [[ ${#files[@]} -eq 1 && "${files[0]}" != *'*'* ]]; then
     java ${JAVA_OPTS} -jar "$executable" generate -c ${files[0]} ${args[@]}
 else
     echo "Please press CTRL+C to stop or the script will continue in 5 seconds."
-
     sleep 5
-    # delete the 3_0_3 python-experimental tests because they are autogenerated our tooling needs to see differences
-    rm -rf "${root}/samples/openapi3/client/3_0_3_unit_test/python-experimental/test"
-
     if [ ${#files[@]} -eq 0 ]; then
       files=("${root}"/bin/configs/*.yaml)
     fi

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

@@ -25,6 +25,7 @@ import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.servers.Server;
 import io.swagger.v3.oas.models.tags.Tag;
 
+import org.apache.commons.io.FileUtils;
 import org.openapitools.codegen.api.TemplatePathLocator;
 import org.openapitools.codegen.ignore.CodegenIgnoreProcessor;
 import org.openapitools.codegen.model.ModelMap;
@@ -740,6 +741,7 @@ public class PythonExperimentalClientCodegen extends AbstractPythonCodegen {
      *      this means that the generated client does not use these models
      *      because they are not used we do not write them
      * - fix the model imports, go from model name to the full import string with toModelImport + globalImportFixer
+     * Also cleans the test folder if test cases exist and the testFolder is set because the tests are autogenerated
      *
      * @param objs a map going from the model name to a object hoding the model info
      * @return the updated objs
@@ -748,6 +750,7 @@ public class PythonExperimentalClientCodegen extends AbstractPythonCodegen {
     public Map<String, ModelsMap> postProcessAllModels(Map<String, ModelsMap> objs) {
         super.postProcessAllModels(objs);
 
+        boolean anyModelContainsTestCases = false;
         Map<String, Schema> allDefinitions = ModelUtils.getSchemas(this.openAPI);
         for (String schemaName : allDefinitions.keySet()) {
             Schema refSchema = new Schema().$ref("#/components/schemas/" + schemaName);
@@ -755,11 +758,17 @@ public class PythonExperimentalClientCodegen extends AbstractPythonCodegen {
             String modelName = toModelName(schemaName);
             if (unaliasedSchema.get$ref() == null) {
                 continue;
-            } else {
+            }
             ModelsMap objModel = objs.get(modelName);
-                if (objModel != null) { // to avoid form parameter's models that are not generated (skipFormModel=true)
+            if (objModel == null) {
+                // to avoid form parameter's models that are not generated (skipFormModel=true)
+                continue;
+            }
             for (ModelMap model : objModel.getModels()) {
                 CodegenModel cm = model.getModel();
+                if (cm.testCases != null && !cm.testCases.isEmpty()) {
+                    anyModelContainsTestCases = true;
+                }
                 String[] importModelNames = cm.imports.toArray(new String[0]);
                 cm.imports.clear();
                 for (String importModelName : importModelNames) {
@@ -767,7 +776,17 @@ public class PythonExperimentalClientCodegen extends AbstractPythonCodegen {
                 }
             }
         }
+        boolean testFolderSet = testFolder != null;
+        if (testFolderSet && anyModelContainsTestCases) {
+            // delete the test folder because tests there will be autogenerated
+            String modelTestFolder = modelTestFileFolder();
+            File testDirectory = new File(modelTestFolder);
+            try {
+                FileUtils.cleanDirectory(testDirectory);
+            } catch (IOException e) {
+                LOGGER.info("Unable to delete the test folder because of exception=" + e.toString());
             }
+
         }
 
         return objs;