mocha.js - sequelize 函数不会在 Mocha 中引发异常

Question

我对 mocha 框架有点陌生。此代码应该抛出异常，但不会。 (为简单起见，将所有代码放入测试中)

describe("Test", function() {
    it("this should throw an error", function() {
        var Sequelize = require("sequelize");
        var sequelize = new Sequelize({
            dialect: 'sqlite',
            storage: 'test.sqlite3'
        });
        var foo = sequelize.define('Foo', {
            var_a: Sequelize.INTEGER,
            var_b: Sequelize.STRING
        });
        sequelize.sync().then(function(err) {
            throw('should throw an error here); // !!! Should throw an exception here
        });
    });
});

有趣的是，当我直接在 node.js 中运行代码时(当然，没有“describe”和“it”行)，它会引发一个应该有的异常。我对 Mocha 有点陌生，我错过了一些非常简单的东西吗？

Answer 1

找到了解决办法。来自 ( https://mochajs.org/#getting-started ):“通过向 it() 添加回调(通常命名为“done”)，Mocha 将知道它应该等待调用此函数以完成测试。”

describe("Test", function() {
    it("this should throw an error", function(done) {
        var Sequelize = require("sequelize");
        var sequelize = new Sequelize({
            dialect: 'sqlite',
            storage: 'db/test_db.sqlite3'
        });
        var foo = sequelize.define('Foo', {
            var_a: Sequelize.INTEGER,
            var_b: Sequelize.STRING
        });
        sequelize.sync().then(function(err) {
            done();
            throw('got here');
        });
    });
});