chore: refine the test

packages/core/__tests__/singleton/Auth/type.test.ts

@@ -2,43 +2,57 @@ import { JWT } from '../../../src/singleton/Auth/types';
 
 describe('type validity', () => {
 	describe('JWT type', () => {
-		it('can contain property that has a value as array of JsonObject', () => {
-			const value: JWT = {
-				payload: { otherProperty: [{ key: '123' }] },
-				toString: () => 'mock',
-			};
-			const a = value.payload.otherProperty as { key: string }[];
-
-			expect(a).toEqual([{ key: '123' }]);
-		});
-
-		it('can contain property that has a value as array of JsonObject and JsonPrimitive', () => {
-			const value: JWT = {
-				payload: { otherProperty: [1, 2, 'hi', { key: 'value' }] },
-				toString: () => 'mock',
-			};
-			const a = value.payload.otherProperty as (
+		it('can contain property that has a value as array of JsonObjects', () => {
+			type OtherProperty1 = (
 				| { key: string }
 				| number
 				| string
+				| (
+						| { key: string }
+						| number
+						| string
+						| ({ key: string } | number | string)[]
+				  )[]
 			)[];
-
-			expect(a).toEqual([1, 2, 'hi', { key: 'value' }]);
-		});
-
-		it('can contain property that has a value as array of JsonArray', () => {
+			// For testing purpose, use type alias here, as TS will complain while using
+			// an interface which triggers structural typing check
+			// eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+			type OtherProperty2 = {
+				key: number;
+				array: (
+					| { key: string }
+					| number
+					| string
+					| ({ key: string } | number | string)[]
+				)[];
+			};
+			const expectedOtherProperty1 = [
+				{ key: '123' },
+				1,
+				'hi',
+				[1, 'hi', { key: '345' }, [2, 'hi', { key: '456' }]],
+			];
+			const expectedOtherProperty2 = {
+				key: 1,
+				array: [1, 'hi', { key: '123' }, [2, 'hi', { key: '456' }]],
+			};
 			const value: JWT = {
 				payload: {
-					otherProperty: [[2, 'hi', { key: 'value' }], 1],
+					otherProperty1: expectedOtherProperty1,
+					otherProperty2: expectedOtherProperty2,
 				},
 				toString: () => 'mock',
 			};
-			const a = value.payload.otherProperty as (
-				| ({ key: string } | number | string)[]
-				| number
-			)[];
 
-			expect(a).toEqual([[2, 'hi', { key: 'value' }], 1]);
+			const extractedOtherProperty1 = value.payload
+				.otherProperty1 as OtherProperty1;
+			const a: OtherProperty1 = extractedOtherProperty1;
+			expect(a).toEqual(expectedOtherProperty1);
+
+			const extractedOtherProperty2 = value.payload
+				.otherProperty2 as OtherProperty2;
+			const b: OtherProperty2 = extractedOtherProperty2;
+			expect(b).toEqual(expectedOtherProperty2);
 		});
 	});
 });