Improvement: Hash-keyed Try-It-Out parameter value storage (#4670)

* allow param update by identity + hashed value storage

* add specActions.changeParamByIdentity

* add identity-based lookup support in spec selectors

* migrate `changeParam` usage to `changeParamByIdentity`

* migrate usage of `parameterWithMeta` to `parameterWithMetaByIdentity`

* update invocations of `changeParamByIdentity` to match fn signature

* use OrderedMap throughout hash-based selectors for consistency

* normalize usage of ParameterRow `onChange`

* migrate bug 4557 tests to reflect new ParameterRow interface

* remove exclusive test blocks

* linter fixes

* copy Parameters changes into OAS3 wrapper

* use rawParam for meta lookups in ParameterRow

test/core/plugins/spec/reducer.js

@@ -129,4 +129,53 @@ describe("spec plugin - reducer", function(){
       expect(response).toEqual(expectedResult)
     })
   })
+  describe("SPEC_UPDATE_PARAM", function() {
+    it("should store parameter values by name+in", () => {
+      const updateParam = reducer["spec_update_param"]
+
+      const path = "/pet/post"
+      const method = "POST"
+
+      const state = fromJS({})
+      const result = updateParam(state, {
+        payload: {
+          path: [path, method],
+          paramName: "body",
+          paramIn: "body",
+          value: `{ "a": 123 }`,
+          isXml: false
+        }
+      })
+
+      const response = result.getIn(["meta", "paths", path, method, "parameters", "body.body", "value"])
+      expect(response).toEqual(`{ "a": 123 }`)
+    })
+    it("should store parameter values by identity", () => {
+      const updateParam = reducer["spec_update_param"]
+
+      const path = "/pet/post"
+      const method = "POST"
+
+      const param = fromJS({
+        name: "body",
+        in: "body",
+        schema: {
+          type: "string"
+        }
+      })
+
+      const state = fromJS({})
+      const result = updateParam(state, {
+        payload: {
+          param,
+          path: [path, method],
+          value: `{ "a": 123 }`,
+          isXml: false
+        }
+      })
+
+      const value = result.getIn(["meta", "paths", path, method, "parameters", `body.body.hash-${param.hashCode()}`, "value"])
+      expect(value).toEqual(`{ "a": 123 }`)
+    })
+  })
 })