Validate SuccessAction workflowId

src/main/java/com/apiflows/parser/OpenAPIWorkflowValidator.java

@@ -273,6 +273,13 @@ List<String> validateSuccessAction(String workflowId, String stepId, SuccessActi
             }
         }
 
+        if(successAction.getWorkflowId() != null && successAction.getType() != null && successAction.getType().equals("goto")) {
+            // when type `goto` workflowId must exist (if provided)
+            if(!workflowExists(workflowId)) {
+                errors.add("Step " + stepId + " SuccessAction workflowId is invalid (no such a workflow exists)");
+            }
+        }
+
         return errors;
     }
 
@@ -493,6 +500,10 @@ boolean stepExists(String workflowId, String stepId) {
         return this.stepIds.get(workflowId) != null && this.stepIds.get(workflowId).contains(stepId);
     }
 
+    boolean workflowExists(String workflowId) {
+        return this.workflowIds.stream().anyMatch(p -> p.contains(workflowId));
+    }
+
     List<String> validateWorkflowIdsUniqueness(List<Workflow> workflows) {
         List<String> errors = new ArrayList<>();
 

src/test/java/com/apiflows/parser/OpenAPIWorkflowValidatorTest.java

@@ -624,6 +624,44 @@ public void validateStepsWorkflowIdsWithoutRuntimeExpression() {
         assertEquals(0, new OpenAPIWorkflowValidator().validateStepsWorkflowIds(steps, multipleWorkflowsSpecFiles).size());
     }
 
+    @Test
+    void stepExists() {
+        OpenAPIWorkflowValidator validator = new OpenAPIWorkflowValidator();
+        Map<String, Set<String>> stepIds = new HashMap<>();
+        stepIds.put("w1", Set.of("step-one", "step-two", "step-three"));
+
+        validator.stepIds = stepIds;
+
+        assertTrue(validator.stepExists("w1", "step-one"));
+    }
+
+    @Test
+    void stepNotFound() {
+        OpenAPIWorkflowValidator validator = new OpenAPIWorkflowValidator();
+        Map<String, Set<String>> stepIds = new HashMap<>();
+        stepIds.put("w1", Set.of("step-one", "step-two", "step-three"));
+
+        validator.stepIds = stepIds;
+
+        assertFalse(validator.stepExists("w1", "step-dummy"));
+    }
+
+    @Test
+    void workflowExists() {
+        OpenAPIWorkflowValidator validator = new OpenAPIWorkflowValidator();
+        validator.workflowIds.add("w1");
+
+        assertTrue(validator.workflowExists("w1"));
+    }
+
+    @Test
+    void workflowNotFound() {
+        OpenAPIWorkflowValidator validator = new OpenAPIWorkflowValidator();
+        validator.workflowIds.add("w1");
+
+        assertFalse(validator.workflowExists("dummy"));
+    }
+
     @Test
     void validWorkflowId() {
         assertTrue(new OpenAPIWorkflowValidator().isValidWorkflowId("idOfTheWorkflow_1"));