Issue #2118. Fix issue with assigning empty model name when title empty for inline schema

modules/swagger-parser-v3/pom.xml

@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.swagger.parser.v3</groupId>
         <artifactId>swagger-parser-project</artifactId>
-        <version>2.1.23-SNAPSHOT</version>
+        <version>2.1.22</version>
         <relativePath>../..</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>

modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/util/InlineModelResolver.java

@@ -5,6 +5,7 @@
 import java.util.List;
 import java.util.Map;
 
+import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -416,7 +417,7 @@ private static String normalize(String pathPart)
     }
 
     private String resolveModelName(String title, String key) {
-        if (title == null) {
+        if (StringUtils.isBlank(title)) {
             return uniqueName(key);
         } else {
             return uniqueName(title);

modules/swagger-parser-v3/src/test/java/io/swagger/v3/parser/util/InlineModelResolverTest.java

@@ -1509,4 +1509,16 @@ public void testSchemaPropertiesBeingPassedToFlattenedModel() {
         assertEquals(userAddress.getWriteOnly(), Boolean.FALSE);
 
     }
+
+    @Test(description = "https://github.com/swagger-api/swagger-parser/issues/2118")
+    public void testInlineSchemaWithEmptyTitle() {
+        ParseOptions options = new ParseOptions();
+        options.setResolve(true);
+        options.setFlatten(true);
+        OpenAPI openAPI = new OpenAPIV3Parser().read("issue2118/issue2118.yaml", null, options);
+
+        assertNotNull(openAPI);
+        assertNotNull(openAPI.getComponents().getSchemas().get("MegaPet_creator"));
+        assertNull(openAPI.getComponents().getSchemas().get(""));
+    }
 }

modules/swagger-parser-v3/src/test/resources/issue2118/issue2118.yaml

@@ -0,0 +1,97 @@
+openapi: "3.0.0"
+info:
+  title: API
+  description: API
+  version: 1.0.0
+paths:
+  /pet-types:
+    post:
+      description: Creates a new pet in the store.  Duplicates are allowed
+      operationId: addPet
+      requestBody:
+        description: Pet to add to the store
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/MegaPet'
+      responses:
+        '200':
+          description: pet response
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/MegaPet'
+        default:
+          description: unexpected error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+components:
+  schemas:
+    Error:
+      required:
+        - code
+        - message
+      properties:
+        code:
+          type: integer
+          format: int32
+        message:
+          type: string
+    MegaPet:
+      properties:
+        id:
+          type: integer
+          format: int64
+        code:
+          type: string
+          format: byte
+          example: MjIyMjIyMg==
+        additionalCode:
+          type: string
+          format: binary
+          example: MjIyMjIyMg==
+        dateOfBirth:
+          type: string
+          format: date
+          example: "2000-12-12"
+        timeOfVaccination:
+          type: string
+          format: date-time
+          example: 2012-01-24T15:54:14.876Z
+        age:
+          type: string
+          pattern: "[0-9]+"
+        owner:
+          type: object
+        previousOwner:
+          type: object
+          example: "prev owner"
+        metadata:
+          type: object
+          maxProperties: 10
+          additionalProperties:
+            type: string
+            maxLength: 256
+        creator:
+          title: ''
+          description: ''
+          type: object
+          properties:
+            id:
+              description: ''
+              type: string
+              example: 63d415e0dd0d828c3a878548
+              readOnly: true
+            email:
+              description: ''
+              type: string
+              example: [email protected]
+              readOnly: true
+            displayName:
+              description: ''
+              type: string
+              example: Boba Fett
+              readOnly: true