Fix the sanitization logic in the auto-generated names

openapi-cli/src/test/java/io/ballerina/openapi/CodeGeneratorTest.java

@@ -868,6 +868,58 @@ public void testDefaultValueGenerationWithServiceContract() {
         }
     }
 
+    @Test
+    public void testDefaultHeadersQueriesParameterNameSanitization() {
+        String definitionPath = RES_DIR.resolve("default_headers_queries_parameters.yaml").toString();
+        BallerinaCodeGenerator generator = new BallerinaCodeGenerator();
+        try {
+            String expectedClientContent = getStringFromGivenBalFile(
+                    expectedDirPath, "default_headers_queries_parameters.bal");
+            generator.generateClient(definitionPath, resourcePath.toString(), filter,
+                    new ClientGeneratorOptions(false, true, false, false,
+                            true, false));
+            if (Files.exists(resourcePath.resolve("client.bal"))) {
+                String generatedClient = getStringFromGivenBalFile(resourcePath, "client.bal");
+                generatedClient = (generatedClient.trim()).replaceAll("\\s+", "");
+                expectedClientContent = (expectedClientContent.trim()).replaceAll("\\s+", "");
+                Assert.assertTrue(generatedClient.contains(expectedClientContent));
+            } else {
+                Assert.fail("Client was not generated");
+            }
+        } catch (IOException | BallerinaOpenApiException |
+                 OASTypeGenException | FormatterException e) {
+            Assert.fail("Error while generating the client: " + e.getMessage());
+        } finally {
+            deleteGeneratedFiles("client.bal");
+        }
+    }
+
+    @Test
+    public void testDefaultHeadersNameConflictWithQuery() {
+        String definitionPath = RES_DIR.resolve("default_headers_conflict_with_query.yaml").toString();
+        BallerinaCodeGenerator generator = new BallerinaCodeGenerator();
+        try {
+            String expectedClientContent = getStringFromGivenBalFile(
+                    expectedDirPath, "default_headers_conflict_with_query.bal");
+            generator.generateClient(definitionPath, resourcePath.toString(), filter,
+                    new ClientGeneratorOptions(false, true, false, false,
+                            true, false));
+            if (Files.exists(resourcePath.resolve("client.bal"))) {
+                String generatedClient = getStringFromGivenBalFile(resourcePath, "client.bal");
+                generatedClient = (generatedClient.trim()).replaceAll("\\s+", "");
+                expectedClientContent = (expectedClientContent.trim()).replaceAll("\\s+", "");
+                Assert.assertTrue(generatedClient.contains(expectedClientContent));
+            } else {
+                Assert.fail("Client was not generated");
+            }
+        } catch (IOException | BallerinaOpenApiException |
+                 OASTypeGenException | FormatterException e) {
+            Assert.fail("Error while generating the client: " + e.getMessage());
+        } finally {
+            deleteGeneratedFiles("client.bal");
+        }
+    }
+
     private String getStringFromGivenBalFile(Path expectedServiceFile, String s) throws IOException {
 
         Stream<String> expectedServiceLines = Files.lines(expectedServiceFile.resolve(s));

openapi-cli/src/test/java/io/ballerina/openapi/generators/client/FunctionBodyNodeTests.java

@@ -42,6 +42,7 @@
 import java.util.Optional;
 import java.util.Set;
 
+import static io.ballerina.openapi.core.generators.common.GeneratorConstants.HEADERS;
 import static io.ballerina.openapi.generators.common.GeneratorTestUtils.getOpenAPI;
 
 /**
@@ -67,7 +68,7 @@ public void getFunctionBodyNodes(String yamlFile, String path, boolean hasHeader
         TypeHandler.createInstance(openapi, false);
         FunctionBodyGeneratorImp functionBodyGeneratorImp = new FunctionBodyGeneratorImp(path, operation, openapi,
                 new AuthConfigGeneratorImp(false, false),
-                new BallerinaUtilGenerator(), new ArrayList<>(), hasHeaders, hasDefaultHeaders, hasQueries);
+                new BallerinaUtilGenerator(), new ArrayList<>(), hasHeaders, hasDefaultHeaders, hasQueries, HEADERS);
         Optional<FunctionBodyNode> bodyNode = functionBodyGeneratorImp.getFunctionBodyNode();
         content = content.trim().replaceAll("\n", "").replaceAll("\\s+", "");
         String bodyNodeContent = bodyNode.get().toString().trim().replaceAll("\n", "")

openapi-cli/src/test/java/io/ballerina/openapi/generators/client/RemoteFunctionNameValidationTests.java

@@ -58,7 +58,7 @@ public void testFunctionNameGeneration(String operationId, String expectedFuncti
     public Object[][] dataProvider() {
         return new Object[][]{
                 {"get-pet-name", "getPetName"},
-                {"GET_Add_permission", "gET_Add_permission"},
+                {"GET_Add_Permission", "gETAddPermission"},
                 {"ListBankAccount", "listBankAccount"},
                 {"chat.media.download", "chatMediaDownload"}
         };

openapi-cli/src/test/resources/default_headers_conflict_with_query.yaml

@@ -0,0 +1,33 @@
+openapi: 3.0.1
+info:
+  title: PayloadV
+  version: 0.0.0
+servers:
+  - url: "http://{server}:{port}/payloadV"
+    variables:
+      server:
+        default: localhost
+      port:
+        default: "8080"
+paths:
+  /albums/{id}:
+    get:
+      operationId: getAlbumsId
+      parameters:
+        - name: id
+          in: path
+          required: true
+          schema:
+            type: integer
+            format: int64
+        - name: headers
+          in: query
+          schema:
+            type: string
+      responses:
+        "200":
+          description: Ok
+          content:
+            application/json:
+              schema:
+                type: object

openapi-cli/src/test/resources/default_headers_queries_parameters.yaml

@@ -0,0 +1,51 @@
+openapi: 3.0.1
+info:
+  title: PayloadV
+  version: 0.0.0
+servers:
+  - url: "http://{server}:{port}/payloadV"
+    variables:
+      server:
+        default: localhost
+      port:
+        default: "8080"
+paths:
+  /albums/{id}:
+    get:
+      operationId: Get_Albums_Id
+      parameters:
+        - name: id
+          in: path
+          required: true
+          schema:
+            type: integer
+            format: int64
+        - name: albumId
+          in: query
+          required: false
+          style: form
+          explode: true
+          schema:
+            type: string
+        - name: q2
+          in: query
+          required: false
+          style: form
+          explode: true
+          schema:
+            type: integer
+            format: int64
+        - name: X-HEADER
+          in: header
+          required: false
+          style: simple
+          explode: false
+          schema:
+            type: string
+      responses:
+        "200":
+          description: Ok
+          content:
+            application/json:
+              schema:
+                type: object