added test to verify issue solved

Author: HugoMario

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

@@ -1337,4 +1337,17 @@ public void testArbitraryObjectModelWithArrayInlineWithTitle() {
         ObjectSchema op = (ObjectSchema) inlineProp;
         assertNull(op.getProperties());
     }
-}
+
+
+    @Test(description = "https://github.com/swagger-api/swagger-parser/issues/1200")
+    public void testInlineItemsSchema() throws Exception {
+        ParseOptions options = new ParseOptions();
+        options.setFlatten(true);
+        OpenAPI openAPI = new OpenAPIV3Parser().read("flatten.json",null, options);
+
+        System.out.println(openAPI);
+
+        assertNotNull(openAPI);
+        assertNotNull(openAPI.getComponents().getSchemas().get("inline_response_200"));
+    }
+}

modules/swagger-parser-v3/src/test/resources/flatten.json

@@ -1,5 +1,59 @@
 {
   "openapi" : "3.0.1",
+  "paths" : {
+    "/employees" : {
+      "get" : {
+        "description" : "Obtain information about employees from HR database",
+        "parameters" : [ {
+          "name" : "bodylimit",
+          "in" : "query",
+          "schema" : {
+            "type" : "integer",
+            "minimum" : 10,
+            "maximum" : 20,
+            "example" : 8
+          }
+        }, {
+          "name" : "pagelimit",
+          "in" : "query",
+          "schema" : {
+            "type" : "integer",
+            "minimum" : 1,
+            "maximum" : 5,
+            "example" : 2
+          }
+        } ],
+        "responses" : {
+          "200" : {
+            "description" : "successully returned number of employees",
+            "content" : {
+              "application/json" : {
+                "schema" : {
+                  "type" : "array",
+                  "items" : {
+                    "properties" : {
+                      "id" : {
+                        "type" : "integer",
+                        "example" : 4
+                      },
+                      "employee name" : {
+                        "type" : "string",
+                        "example" : "vijay"
+                      },
+                      "employee title" : {
+                        "type" : "string",
+                        "example" : "QA"
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
   "components" : {
     "schemas" : {
       "ReturnInformation": {
@@ -47,4 +101,4 @@
       }
     }
   }
-}
+}