import subprocess

from scripts.test import shared

from . import utils


def run(cmd):
    return shared.run_process(cmd, stderr=subprocess.PIPE).stderr


class WarningsText(utils.BinaryenTestCase):
    def test_warn_on_no_passes(self):
        err = run(shared.WASM_OPT + [self.input_path('asyncify-pure.wat'), '-o', 'a.wasm'])
        self.assertIn('warning: no passes specified, not doing any work', err)

    def test_warn_on_no_output(self):
        err = run(shared.WASM_OPT + [self.input_path('asyncify-pure.wat'), '-O1'])
        self.assertIn('warning: no output file specified, not emitting output', err)

    def test_quiet_suppresses_warnings(self):
        err = run(shared.WASM_OPT + [self.input_path('asyncify-pure.wat'), '-q'])
        self.assertNotIn('warning', err)

    def test_no_warn_on_print(self):
        err = run(shared.WASM_OPT + [self.input_path('asyncify-pure.wat'), '--print'])
        self.assertNotIn('warning: no output file specified, not emitting output', err)

    def test_no_warn_on_print_function_map(self):
        err = run(shared.WASM_OPT + [self.input_path('asyncify-pure.wat'), '--print-function-map'])
        self.assertNotIn('warning: no output file specified, not emitting output', err)