def test_normal(self, capsys):
"""Test without changing sys.stderr/sys.stdout."""
data = io.StringIO()
with utils.fake_io(data.write):
sys.stdout.write('hello\n')
sys.stderr.write('world\n')
out, err = capsys.readouterr()
assert not out
assert not err
assert data.getvalue() == 'hello\nworld\n'
sys.stdout.write('back to\n')
sys.stderr.write('normal\n')
out, err = capsys.readouterr()
assert out == 'back to\n'
assert err == 'normal\n'
def test_normal(self, capsys):
"""Test without changing sys.stderr/sys.stdout."""
data = io.StringIO()
with utils.fake_io(data.write):
sys.stdout.write('hello\n')
sys.stderr.write('world\n')
out, err = capsys.readouterr()
assert not out
assert not err
assert data.getvalue() == 'hello\nworld\n'
sys.stdout.write('back to\n')
sys.stderr.write('normal\n')
out, err = capsys.readouterr()
assert out == 'back to\n'
assert err == 'normal\n'
def test_stderr_replaced(self, capsys):
"""Test with replaced stderr."""
data = io.StringIO()
new_stderr = io.StringIO()
with utils.fake_io(data.write):
sys.stdout.write('hello\n')
sys.stderr.write('world\n')
sys.stderr = new_stderr
out, err = capsys.readouterr()
assert not out
assert not err
assert data.getvalue() == 'hello\nworld\n'
sys.stdout.write('normal\n')
sys.stderr.write('still new\n')
out, err = capsys.readouterr()
assert out == 'normal\n'
assert not err
assert new_stderr.getvalue() == 'still new\n'
def test_stderr_replaced(self, capsys):
"""Test with replaced stderr."""
data = io.StringIO()
new_stderr = io.StringIO()
with utils.fake_io(data.write):
sys.stdout.write('hello\n')
sys.stderr.write('world\n')
sys.stderr = new_stderr
out, err = capsys.readouterr()
assert not out
assert not err
assert data.getvalue() == 'hello\nworld\n'
sys.stdout.write('normal\n')
sys.stderr.write('still new\n')
out, err = capsys.readouterr()
assert out == 'normal\n'
assert not err
assert new_stderr.getvalue() == 'still new\n'
def test_stdout_replaced(self, capsys):
"""Test with replaced stdout."""
data = io.StringIO()
new_stdout = io.StringIO()
with utils.fake_io(data.write):
sys.stdout.write("hello\n")
sys.stderr.write("world\n")
sys.stdout = new_stdout
out, err = capsys.readouterr()
assert not out
assert not err
assert data.getvalue() == "hello\nworld\n"
sys.stdout.write("still new\n")
sys.stderr.write("normal\n")
out, err = capsys.readouterr()
assert not out
assert err == "normal\n"
assert new_stdout.getvalue() == "still new\n"
