我有一個函式，并且單元測驗的覆寫率為 75%，但是，我希望單元測驗的覆寫率為 100%。這是函式：
calculateRatingSummary(): void {
if (this.averageRating > 0) {
this.avgRatings = Math.trunc(this.averageRating);
this.avgRatingCollection.length = this.avgRatings;
this.noRatings = this.totalRating - this.avgRatings;
if (this.averageRating % 1 > 0) {
this.noRatings--;
}
this.noRatingsCollection.length = this.noRatings;
} else {
this.noRatingsCollection.length = this.totalRating;
}
}
這是我為此方法撰寫的所有單元測驗：
describe('calculateRatingSummary', () => {
it('check if company has peer review average rating', () => {
component.averageRating = 2.3;
component.calculateRatingSummary();
expect(component.avgRatingCollection).not.toBeFalse();
});
it('rating display with no decimals if it has or not', () => {
component.averageRating = 3.6;
component.calculateRatingSummary();
expect(component.avgRatings).toEqual(3);
});
it('all rating stars displays as light shaded when averageRating is smaller than zero', () => {
component.averageRating = 0;
component.calculateRatingSummary();
expect(component.noRatingsCollection.length).toEqual(5);
});
it('if averageRating has decimals, noRatings is noRatings minus 1', () => {
component.averageRating = 4.1;
component.calculateRatingSummary();
expect(component.noRatings).toEqual(component.noRatings);
});
});
但是如果在運行時進行測驗，我將無法獲得第一個嵌套 npm run test-cover && npm run cover-report
我得到 100% 的通過測驗，但覆寫了 75% 的分支，因為它說測驗沒有覆寫：
這個條件：
if (this.averageRating % 1 > 0) {
this.noRatings--;
}
沒有被測驗覆寫，我想知道為什么？無論我嘗試什么，我都無法對其進行測驗。你能幫助我嗎？
uj5u.com熱心網友回復：
I think else condition is not met in any specs you are expecting, you can try this it might work as our motive is to satisy the else condition i.e.. this.averageRating % 1 < 0
Example spec -
it('if averageRating modulos 1 equal to less than 0', () => {
component.averageRating = 2;
component.calculateRatingSummary();
expect(component).toBeTruthy();
});
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