WIP response header changes handling

Author: DrSatyr

core/src/test/java/org/openapitools/openapidiff/core/ResponseHeaderDiffTest.java

@@ -58,17 +58,16 @@ public void testResponseHeadersRequiredChanges() {
     assertThat(changedHeaders).containsKey("x-header-required-changed");
   }
 
-  // TODO response schema type changes are not handled
-  // @Test
-  public void testResponseHeadersSchemaChanges() {
+  @Test
+  public void testResponseHeadersExplodeChanges() {
     ChangedOpenApi changedOpenApi = OpenApiCompare.fromLocations(OPENAPI_DOC1, OPENAPI_DOC2);
     ChangedHeaders changedResponseHeaders =
-        getChangedResponseHeaders(changedOpenApi, GET, "/response/headers/schema", "200");
+        getChangedResponseHeaders(changedOpenApi, GET, "/response/headers/explode", "200");
 
     assertThat(changedResponseHeaders).isNotNull();
     Map<String, ChangedHeader> changedHeaders = changedResponseHeaders.getChanged();
 
-    assertThat(changedHeaders).containsKey("x-header-schema-changed");
+    assertThat(changedHeaders).containsKey("x-header-explode-changed");
   }
 
   @Test // issue #485

core/src/test/resources/response_header_1.yaml

@@ -50,13 +50,14 @@ paths:
                 type: string
           content:
             application/json: { }
-  /response/headers/schema:
+  /response/headers/explode:
     get:
       responses:
         '200':
           description: some description
           headers:
-            x-header-schema-changed:
+            x-header-explode-changed:
+              explode: false
               schema:
                 type: string
           content:

core/src/test/resources/response_header_2.yaml

@@ -50,14 +50,15 @@ paths:
                 type: string
           content:
             application/json: { }
-  /response/headers/schema:
+  /response/headers/explode:
     get:
       responses:
         '200':
           description: some description
           headers:
-            x-header-schema-changed:
+            x-header-explode-changed:
+              explode: true
               schema:
-                type: int64
+                type: string
           content:
             application/json: { }