fix(parameters): allowedValues for enum and boolean types (#8231)

* Change parameter with empty map

* Change allowValues data type

Co-authored-by: Tim Lai <timothy.lai@smartbear.com>

src/core/json-schema-components.jsx

@@ -85,7 +85,7 @@ export class JsonSchema_string extends Component {
       const Select = getComponent("Select")
       return (<Select className={ errors.length ? "invalid" : ""}
                       title={ errors.length ? errors : ""}
-                      allowedValues={ enumValue }
+                      allowedValues={ [...enumValue] }
                       value={ value }
                       allowEmptyValue={ !required }
                       disabled={disabled}
@@ -335,14 +335,14 @@ export class JsonSchema_boolean extends Component {
     errors = errors.toJS ? errors.toJS() : []
     let enumValue = schema && schema.get ? schema.get("enum") : null
     let allowEmptyValue = !enumValue || !required
-    let booleanValue = !enumValue && fromJS(["true", "false"])
+    let booleanValue = !enumValue && ["true", "false"]
     const Select = getComponent("Select")
 
     return (<Select className={ errors.length ? "invalid" : ""}
                     title={ errors.length ? errors : ""}
                     value={ String(value) }
                     disabled={ disabled }
-                    allowedValues={ enumValue || booleanValue }
+                    allowedValues={ enumValue ? [...enumValue] : booleanValue }
                     allowEmptyValue={ allowEmptyValue }
                     onChange={ this.onEnumChange }/>)
   }

src/helpers/get-parameter-schema.js

@@ -86,7 +86,7 @@ export default function getParameterSchema(parameter, { isOAS3 } = {}) {
   }
 
   return {
-    schema: parameter.get("schema", Im.Map()),
+    schema: parameter.get("schema") ? parameter.get("schema", Im.Map()): Im.Map(),
     parameterContentMediaType: null,
   }
 }