test: Adjust the test and add one more test cases

packages/common/test/pipes/parse-enum.pipe.spec.ts

@@ -14,10 +14,17 @@ describe('ParseEnumPipe', () => {
     Up = 'UP',
   }
   let target: ParseEnumPipe;
+  let tatargetWithOptionIsTrue: ParseEnumPipe;
+
   beforeEach(() => {
     target = new ParseEnumPipe(Direction, {
       exceptionFactory: (error: any) => new CustomTestError(),
     });
+
+    tatargetWithOptionIsTrue = new ParseEnumPipe(Direction, {
+      exceptionFactory: (error: any) => new CustomTestError(),
+      optional: true,
+    });
   });
   describe('transform', () => {
     describe('when validation passes', () => {
@@ -27,7 +34,7 @@ describe('ParseEnumPipe', () => {
         );
       });
 
-      it('should not throw an error if enumType is undefined/null and isOptional is true', async () => {
+      it('should not throw an error if enumType is undefined/null and optional is true', async () => {
         const target = new ParseEnumPipe('DOWN', { optional: true });
         const value = await target.transform(undefined, {} as ArgumentMetadata);
         expect(value).to.equal(undefined);
@@ -39,6 +46,12 @@ describe('ParseEnumPipe', () => {
           target.transform('DOWN', {} as ArgumentMetadata),
         ).to.be.rejectedWith(CustomTestError);
       });
+
+      it('should throw an error if enumType is wrong even optional is true', async () => {
+        return expect(
+          tatargetWithOptionIsTrue.transform('DOWN', {} as ArgumentMetadata),
+        ).to.be.rejectedWith(CustomTestError);
+      });
     });
   });
   describe('constructor', () => {