angular - else单元测试中未采用的路径

Question

我正在研究 Angular 6

I don't have any else statement in my below code.But I am unable to cover branches due to else path not taken .What I need to do to get 100% branch coverage in this case?

 getHeaderDocumentList(documents: any) {
            if (documents) {
                documents.result.docAttachment.forEach(element => {
                    this.headerdocumentdetails.push(element.DocumentUniqueID);
                });
            }
        }

Answer 1

为了获得完整的覆盖率报告，代码最终需要命中else -path(此处不明确存在)。为此，传入falsy参数，例如0 | false | undefined | null | NaN | '' | "" | ``，如下所示:

component.getHeaderDocumentList(false);
expect(false).toEqual(false); // This line is optional. Most test suites require some kind of assertion in each test.

现在，您的测试套件应报告两个分支均已覆盖。

Last solution would be to add /* istanbul ignore else */ in before the if case. That will tell the coverage reporter to effectively ignore the else path