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#!/usr/bin/env python3

"""tests for hello.py"""

import os

from subprocess import getstatusoutput, getoutput

prg = './hello.py'

# --------------------------------------------------

def test_exists():

"""exists"""

assert os.path.isfile(prg)

# --------------------------------------------------

def test_runnable():

"""Runs using python3"""

out = getoutput(f'python3 {prg}')

assert out.strip() == 'Hello, World!'

# --------------------------------------------------

def test_executable():

"""Says 'Hello, World!' by default"""

out = getoutput(prg)

assert out.strip() == 'Hello, World!'

# --------------------------------------------------

def test_usage():

"""usage"""

for flag in ['-h', '--help']:

rv, out = getstatusoutput(f'{prg} {flag}')

assert rv == 0

assert out.lower().startswith('usage')

# --------------------------------------------------

def test_input():

"""test for input"""

for val in ['Universe', 'Multiverse']:

for option in ['-n', '--name']:

rv, out = getstatusoutput(f'{prg} {option} {val}')

assert rv == 0

assert out.strip() == f'Hello, {val}!'