fix: streamline management of user-selected produces and consumes values (#4137)

* Remove produces/consumes setter from OperationContainer

* Store consumes/produces information in `meta` key

* Migrate produces value state usage to `meta` key

* use meta consumes data for isXml check

* Fix failing tests

* normalize action name casing

* restore correct produces fallback value logic

test/core/plugins/spec/selectors.js

@@ -56,6 +56,13 @@ describe("spec plugin - selectors", function(){
       // Given
       let state = fromJS({
         resolved: {
+          paths: {
+            "/one": {
+              get: {}
+            }
+          }
+        },
+        meta: {
           paths: {
             "/one": {
               get: {
@@ -76,6 +83,71 @@ describe("spec plugin - selectors", function(){
       })
     })
 
+    it("should default to the first `produces` array value if current is not set", function(){
+      // Given
+      let state = fromJS({
+        resolved: {
+          paths: {
+            "/one": {
+              get: {
+                produces: [
+                  "application/xml",
+                  "application/whatever"
+                ]
+              }
+            }
+          }
+        },
+        meta: {
+          paths: {
+            "/one": {
+              get: {
+                "consumes_value": "one"
+              }
+            }
+          }
+        }
+      })
+
+      // When
+      let contentTypes = contentTypeValues(state, [ "/one", "get" ])
+      // Then
+      expect(contentTypes.toJS()).toEqual({
+        requestContentType: "one",
+        responseContentType: "application/xml"
+      })
+    })
+
+    it("should default to `application/json` if a default produces value is not available", function(){
+      // Given
+      let state = fromJS({
+        resolved: {
+          paths: {
+            "/one": {
+              get: {}
+            }
+          }
+        },
+        meta: {
+          paths: {
+            "/one": {
+              get: {
+                "consumes_value": "one"
+              }
+            }
+          }
+        }
+      })
+
+      // When
+      let contentTypes = contentTypeValues(state, [ "/one", "get" ])
+      // Then
+      expect(contentTypes.toJS()).toEqual({
+        requestContentType: "one",
+        responseContentType: "application/json"
+      })
+    })
+
     it("should prioritize consumes value first from an operation", function(){
       // Given
       let state = fromJS({
@@ -83,13 +155,21 @@ describe("spec plugin - selectors", function(){
           paths: {
             "/one": {
               get: {
-                "consumes_value": "one",
-                "parameters": [{  
+                "parameters": [{
                   "type": "file"
                 }],
               }
             }
           }
+        },
+        meta: {
+          paths: {
+            "/one": {
+              get: {
+                "consumes_value": "one",
+              }
+            }
+          }
         }
       })
 
@@ -106,7 +186,7 @@ describe("spec plugin - selectors", function(){
           paths: {
             "/one": {
               get: {
-                "parameters": [{  
+                "parameters": [{
                   "type": "file"
                 }],
               }
@@ -128,7 +208,7 @@ describe("spec plugin - selectors", function(){
           paths: {
             "/one": {
               get: {
-                "parameters": [{  
+                "parameters": [{
                   "type": "formData"
                 }],
               }
@@ -143,7 +223,7 @@ describe("spec plugin - selectors", function(){
       expect(contentTypes.toJS().requestContentType).toEqual("application/x-www-form-urlencoded")
     })
 
-    it("should be ok, if no operation found", function(){
+    it("should return nothing, if the operation does not exist", function(){
       // Given
       let state = fromJS({ })