Testcafe自定义报告程序未从this.formatError返回

Question

我正在尝试为testcafe实现自定义报告程序。如果测试用例中有错误，并且调用了this.formatError，则它不是从this.formatError返回的。只是无限期地挂在那里，我需要手动ctrl-c来停止testcafe进程。但是，如果我删除this.formatError并再试一次，则它可以正常工作。可能是什么原因？

下面是reportTestDone（）的代码

    reportTestDone (name, testRunInfo, meta) {

        const errors      = testRunInfo.errs;
        const warnings    = testRunInfo.warnings;
        const hasErrors   = !!errors.length;
        const hasWarnings = !!warnings.length;
        const result      = hasErrors ? this.chalk.red('failed') 
            : this.chalk.green('passed');

        const title = `${result} ${name} @ ${meta.page}`;

        this.write(title)
            .newline();

        if (hasErrors) {
            this.write('Errors:')
                .newline();

            errors.forEach((error, idx) => {
                this.setIndent(4)
                    .write(this.formatError(error, `${idx + 1} `)) //<-- this line is the problem
                    .write(error.errMsg)
                    .newline();
            });
            this.setIndent(0);
        }

        if (hasWarnings) {
            this.newline()
                .write('Warnings:');

            warnings.forEach(warning => {
                this.newline()
                    .write(warning);
            });
        }
        this.setIndent(0);
     }