Postman Generator: Format json edge case

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

@@ -2,6 +2,7 @@
 
 
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.io.JsonStringEncoder;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
@@ -332,8 +333,8 @@ public void addToMap(CodegenOperation codegenOperation) {
             }
         }
 
-        tagName = formatDescription(tagName);
-        tagDescription = formatDescription(tagDescription);
+        tagName = escapeJsonString(tagName);
+        tagDescription = escapeJsonString(tagDescription);
 
         PostmanRequestFolder folder = new PostmanRequestFolder(tagName, tagDescription);
         List<CodegenOperation> list = codegenOperationsByTag.get(folder);
@@ -685,6 +686,13 @@ public String formatDescription(String description) {
         return description;
     }
 
+    String escapeJsonString(String value) {
+        if (value == null) {
+            return null;
+        }
+        return new String(JsonStringEncoder.getInstance().quoteAsString(value));
+    }
+
     /**
      * Extract all placeholders (string delimited by curly braces ie {{PLACEHOLDER}}) from the input string
      *

modules/openapi-generator/src/test/java/org/openapitools/codegen/postman/PostmanCollectionCodegenTest.java

@@ -150,6 +150,38 @@ public void testTagDescriptionIsJsonEscaped() throws IOException {
         assertEquals("Basic \"quoted\" tag\nsecond line", basicFolder.get("description").asText());
     }
 
+    @Test
+    public void testTagDescriptionControlCharsAreJsonEscaped() throws IOException {
+        File output = Files.createTempDirectory("postmantest_").toFile();
+        output.deleteOnExit();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("postman-collection")
+                .setInputSpec("src/test/resources/3_0/postman-collection/TagDescriptionControlCharsEscaping.yaml")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        final ClientOptInput clientOptInput = configurator.toClientOptInput();
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(clientOptInput).generate();
+
+        files.forEach(File::deleteOnExit);
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        JsonNode root = objectMapper.readTree(new File(output + "/postman.json"));
+        JsonNode folders = root.get("item");
+
+        JsonNode basicFolder = null;
+        for (JsonNode folder : folders) {
+            if ("basic".equals(folder.get("name").asText())) {
+                basicFolder = folder;
+                break;
+            }
+        }
+
+        assertNotNull(basicFolder);
+        assertEquals("desc with \\t tab, \\b backspace, \\f formfeed, \\r carriage-return, \\n line", basicFolder.get("description").asText());
+    }
+
     @Test
     public void testValidatePostmanJson() throws IOException {
 

modules/openapi-generator/src/test/resources/3_0/postman-collection/TagDescriptionControlCharsEscaping.yaml

@@ -0,0 +1,33 @@
+openapi: 3.0.0
+info:
+  title: Tag Description Control Chars Escaping
+  version: '1.0'
+servers:
+  - url: 'http://localhost:5001'
+paths:
+  '/users/{userId}':
+    get:
+      summary: Get User
+      operationId: get-users-userId
+      tags:
+        - basic
+      parameters:
+        - description: Unique identifier of the user
+          name: userId
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: User Found
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  id:
+                    type: integer
+tags:
+  - name: basic
+    description: "desc with \\t tab, \\b backspace, \\f formfeed, \\r carriage-return, \\n line"