如果done
被称为比null
以外的参数,测试将失败,并报告为此类。其他测试仍将执行。
它允许您测试的成功,也为错误:
it('succeed', (done) => {
myFunc('success', (err, res) => {
if(err) {
done(err);
} else if(res !== 'expected') {
done('Wrong result ' + res);
} else {
done();
}
});
});
it('fail with error 404', (done) => {
myFunc('fail', (err, res) => {
if(err) {
if(err === 404) {
done();
} else {
done('Error was expected to be 404, got ' + err);
}
} else {
done('Was expected to fail, got result ' + res + ' and no error');
}
});
});
it('succeed', (done) => {
try {
var res = myFuncSync('succeed');
} catch(err) {
done(err);
}
done();
});
it('fail with error 404', (done) => {
try {
var res = myFuncSync('succeed');
} catch(err) {
if(err === 404) {
done();
} else {
done('Error was expected to be 404, got ' + err);
}
}
done('Was expected to fail, got result ' + res + ' and no error');
});
总是用'做(ERR)'如果你有异步代码。抛出异步字符将不起作用。 –