import unittest
from typing import List

from argclass import argclass


class TestArgClass(unittest.TestCase):

    def test__required_argument(self):

        @argclass
        class A:
            arg1: str

        assert A.parse_args(['--arg1', 'hello']) == A(arg1='hello')

    @unittest.expectedFailure
    def test__required_argument_missing(self):

        @argclass
        class A:
            arg1: str

        A.parse_args([])

    @unittest.expectedFailure
    def test__required_argument_wrong_given(self):

        @argclass
        class A:
            arg1: str

        A.parse_args(['--arg2', 'hello'])

    def test__optional_argument_missing(self):

        @argclass
        class A:
            arg2: str = 'world'

        assert A.parse_args([]) == A(arg2='world')

    def test__optional_argument_given(self):

        @argclass
        class A:
            arg2: str = 'world'

        assert A.parse_args(['--arg2', 'welt']) == A(arg2='welt')

    @unittest.expectedFailure
    def test__optional_argument_wrong_given(self):

        @argclass
        class A:
            arg2: str = 'world'

        A.parse_args(['--arg3', 'welt'])


    def test__boolean_true(self):

        @argclass
        class A:
            arg3: bool

        assert A.parse_args(['--arg3']) == A(arg3=True)


    def test__boolean_false(self):

        @argclass
        class A:
            arg3: bool

        assert A.parse_args(['--no-arg3']) == A(arg3=False)

    def test__int(self):

        @argclass
        class A:
            arg4: int

        assert A.parse_args(['--arg4', '42']) == A(arg4=42)

    @unittest.expectedFailure
    def test__int_malformed(self):

        @argclass
        class A:
            arg4: int

        A.parse_args(['--arg4', '4e2'])

    def test__list(self):

        @argclass
        class A:
            arg5: List

        assert A.parse_args(['--arg5', 'hello', 'world']) == A(arg5=['hello', 'world'])


    def test__list_str(self):

        @argclass
        class A:
            arg5: List[str]

        assert A.parse_args(['--arg5', 'hello', 'world']) == A(arg5=['hello', 'world'])


    def test__list_int(self):

        @argclass
        class A:
            arg5: List[int]

        assert A.parse_args(['--arg5', '23', '42']) == A(arg5=[23, 42])


if __name__ == '__main__':
    unittest.main()