fix: dont render unmarshal for property with const (#1799)

Co-authored-by: Samriddhi <[email protected]>%0ACo-authored-by: Jonas Lagoni <[email protected]>

src/generators/typescript/presets/utils/UnmarshalFunction.ts

@@ -29,6 +29,10 @@ function renderUnmarshalProperty(
  * Render the code for unmarshalling of regular properties
  */
 function unmarshalRegularProperty(propModel: ConstrainedObjectPropertyModel) {
+  if (propModel.property.options.const) {
+    return undefined;
+  }
+
   const modelInstanceVariable = `obj["${propModel.unconstrainedPropertyName}"]`;
   const unmarshalCode = renderUnmarshalProperty(
     modelInstanceVariable,

test/generators/typescript/preset/MarshallingPreset.spec.ts

@@ -68,6 +68,10 @@ const doc = {
           type: 'string'
         }
       ]
+    },
+    constTest: {
+      type: 'string',
+      const: 'TEST'
     }
   }
 };

test/generators/typescript/preset/__snapshots__/MarshallingPreset.spec.ts.snap

@@ -10,6 +10,7 @@ exports[`Marshalling preset should render un/marshal code 1`] = `
   private _unionArrayTest?: (NestedTest | string)[];
   private _arrayTest?: NestedTest[];
   private _tupleTest?: [NestedTest, string];
+  private _constTest?: 'TEST' = 'TEST';
   private _additionalProperties?: Map<string, NestedTest | string>;
 
   constructor(input: {
@@ -58,6 +59,8 @@ exports[`Marshalling preset should render un/marshal code 1`] = `
   get tupleTest(): [NestedTest, string] | undefined { return this._tupleTest; }
   set tupleTest(tupleTest: [NestedTest, string] | undefined) { this._tupleTest = tupleTest; }
 
+  get constTest(): 'TEST' | undefined { return this._constTest; }
+
   get additionalProperties(): Map<string, NestedTest | string> | undefined { return this._additionalProperties; }
   set additionalProperties(additionalProperties: Map<string, NestedTest | string> | undefined) { this._additionalProperties = additionalProperties; }
 
@@ -114,10 +117,13 @@ exports[`Marshalling preset should render un/marshal code 1`] = `
     }
     json += \`\\"tupleTest\\": [\${serializedTuple.join(',')}],\`;
     }
+    if(this.constTest !== undefined) {
+      json += \`\\"constTest\\": \${typeof this.constTest === 'number' || typeof this.constTest === 'boolean' ? this.constTest : JSON.stringify(this.constTest)},\`;
+    }
     if(this.additionalProperties !== undefined) { 
       for (const [key, value] of this.additionalProperties.entries()) {
         //Only unwrap those that are not already a property in the JSON object
-        if([\\"string prop\\",\\"enumProp\\",\\"numberProp\\",\\"nestedObject\\",\\"unionTest\\",\\"unionArrayTest\\",\\"arrayTest\\",\\"tupleTest\\",\\"additionalProperties\\"].includes(String(key))) continue;
+        if([\\"string prop\\",\\"enumProp\\",\\"numberProp\\",\\"nestedObject\\",\\"unionTest\\",\\"unionArrayTest\\",\\"arrayTest\\",\\"tupleTest\\",\\"constTest\\",\\"additionalProperties\\"].includes(String(key))) continue;
         if(value instanceof NestedTest) {
           json += \`\\"\${key}\\": \${value.marshal()},\`;
         } else {
@@ -157,9 +163,10 @@ exports[`Marshalling preset should render un/marshal code 1`] = `
     if (obj[\\"tupleTest\\"] !== undefined) {
       instance.tupleTest = obj[\\"tupleTest\\"];
     }
+
   
     instance.additionalProperties = new Map();
-    const propsToCheck = Object.entries(obj).filter((([key,]) => {return ![\\"string prop\\",\\"enumProp\\",\\"numberProp\\",\\"nestedObject\\",\\"unionTest\\",\\"unionArrayTest\\",\\"arrayTest\\",\\"tupleTest\\",\\"additionalProperties\\"].includes(key);}));
+    const propsToCheck = Object.entries(obj).filter((([key,]) => {return ![\\"string prop\\",\\"enumProp\\",\\"numberProp\\",\\"nestedObject\\",\\"unionTest\\",\\"unionArrayTest\\",\\"arrayTest\\",\\"tupleTest\\",\\"constTest\\",\\"additionalProperties\\"].includes(key);}));
     for (const [key, value] of propsToCheck) {
       instance.additionalProperties.set(key, value as any);
     }