断言无法正常工作

Question

这是python代码i以 transcrypt -b -n -m (版本3.6.84(传输的代码：

>

def test_1():
    console.log('before assert')
    assert False, "False fails"
    console.log('we should not see that if assert fails as expected')

def test_2():
    console.log('before assert')
    try:
        assert False, "False fails"
    except AssertionError as exception:
        console.log('we should see that since we catch the assertion error')
    console.log('after assert')

当我在浏览器控制台中运行test_1/test_2时，我会得到一个奇怪的行为：

> mymodule.test_1()
before assert
we should not see that if assert fails as expected
<- undefined
> mymodule.test_2()
before assert
after assert
<- undefined

为什么断言没有例外？

Answer 1

回答问题482：

您需要-DA开关来激活断言：

transcrypt -b -n -m -da

我已经测试了：

def test_1():
    console.log('before assert')
    assert False, "False fails"
    console.log('we should not see that if assert fails as expected')
def test_2():
    console.log('before assert')
    try:
        assert False, "False fails"
    except AssertionError as exception:
        console.log('we should see that since we catch the assertion error')
    console.log('after assert')
try:    
    test_1()
except AssertionError as exception:
    console.log('we should see this')
test_2()

它打印：

before assert
we should see this
before assert
we should see that since we catch the assertion error
after assert

thressCrypt中的许多东西都是可选的，以防止生成的JavaScript膨胀。某些功能由命令行开关控制：

http://www.transcrypt.org/docs/html/installation_use.html#available-command-line-switches

某些功能(也(由Pragma的(编译器指令(控制：

http://www.transcrypt.org/docs/html/special_facilities.html#the-pragma-mechanism