fix broken test cases and coverage

Author: ralfhandl

tests/schema/fail/components-object-wrong-field-types.yaml

@@ -13,3 +13,4 @@ components:
   links: []
   callbacks: []
   pathItems: []
+  mediaTypes: []

tests/schema/fail/encoding-enc-item-exclusion.yaml

@@ -4,9 +4,11 @@ info:
   version: 1.0.0
 components:
   requestBodies:
-    content:
-      multipart/mixed:
-        prefixEncoding:
-        - contentType: multipart/mixed
-          encoding: {}
-          prefixEncoding: []
+    encoding-with-prefixEncoding-not-allowed:
+      content:
+        multipart/mixed:
+          encoding:
+            foo:
+              contentType: multipart/mixed
+              encoding: {}
+              prefixEncoding: []

tests/schema/fail/encoding-enc-prefix-exclusion.yaml

@@ -4,9 +4,11 @@ info:
   version: 1.0.0
 components:
   requestBodies:
-    content:
-      multipart/mixed:
-        prefixEncoding:
-        - contentType: multipart/mixed
-          encoding: {}
-          itemEncoding: []
+    encoding-with-itemEncoding-not-allowed:
+      content:
+        multipart/mixed:
+          encoding:
+            foo:
+              contentType: multipart/mixed
+              encoding: {}
+              itemEncoding: []

tests/schema/fail/invalid-components.yaml

@@ -156,6 +156,7 @@ components:
     invalid-encoding-object:
       content:
         'application/json':
+          description: true
           encoding:
             foo: true
             bar:
@@ -164,3 +165,5 @@ components:
               style: true
               explode: yes
               allowReserved: no
+              encoding: true
+              prefixEncoding: true