trjhtr

I am writing Jasmine tests in an Angular application and need to verify if I am testing correctly. If not, I would like suggestions in what area I should actually test.

If you see in the code, harness.fedExciseExpensesInputs is test data created by me. It's like mocking the actual data. The property returns a filtered value if currentSelectedCoveragePolicy is not equal to zero, else it will return _fedExTax which is defined in the declarations.

Here is the property in the component that I am testing called fedExTax:

Component code:

@Input() fedExciseExpensesInputs: Array<BackendDto.FedExciseExpense>;
@Input() currentSelectedCurrency: string;
@Input() currentSelectedCoveragePolicy: number;
@Input() currentSelected953D: number;
private _fedExTax: BackendDto.FedExciseExpense = value: 0, coveragePolicyTypeId: null, is953D: null ;

 get fedExTax(): BackendDto.FedExciseExpense 
 if (this.currentSelectedCoveragePolicy !== 0) 
 this.isReadOnly = false;
 return this.fedExciseExpensesInputs.find(x => x.coveragePolicyTypeId === this.currentSelectedCoveragePolicy && x.is953D === this.currentSelected953D);
 else 
 this.isReadOnly = true;
 return this._fedExTax;
 
 

Test code:

 beforeEach(() => 
 fixture = TestBed.createComponent(HostFormTestComponent);
 harness = fixture.componentInstance;
 fixture.detectChanges();
 sut = harness.componentUnderTest;
 harness.incrementalExpensesInputs = IncrementalExpenses;
 harness.fedExciseExpensesInputs = fedExciseTaxExpenses;
 fixture.detectChanges();
 );

 it('should set fields correctly when currentSelectedCoveragePolicy is 0', () => 
 sut.fedExTax.coveragePolicyTypeId = 0;
 fixture.detectChanges();
 //expect(sut.fedExTax.coveragePolicyTypeId).toBeNull();
 expect(sut.fedExciseExpensesInputs).toBeNull();
 );

 it('should set fields correctly when currentSelectedCoveragePolicy is 1', () => 
 sut.currentSelectedCoveragePolicy = 1;
 fixture.detectChanges();
 expect(sut.fedExciseExpensesInputs[0].coveragePolicyTypeId).toEqual(1);
 //expect(sut.fedExTax.coveragePolicyTypeId).toEqual(1);
 );


 export const createFedExciseExpenses = (): Array<BackendDto.FedExciseExpense> => 
 return [
 is953D : 1, coveragePolicyTypeId : 1, value : 0,
 is953D : 0, coveragePolicyTypeId : 1, value : 1,
 is953D : 0, coveragePolicyTypeId : 2, value : 4,
 is953D : 1, coveragePolicyTypeId : 2, value : 0
 ];
;