def test_nonexistent():
"""Running `which [-as] <program>` where <program> does not exist
should exit with a nonzero status."""
assert len(check_fail(["which",
"this-program-does-not-exist"]).stdout) == 0
assert len(
check_fail(["which", "-a", "this-program-does-not-exist"]).stdout) == 0
assert len(
check_fail(["which", "-s", "this-program-does-not-exist"]).stdout) == 0
assert len(
check_fail(["which", "-as",
"this-program-does-not-exist"]).stdout) == 0
assert len(
check_fail(["which", "-sa",
"this-program-does-not-exist"]).stdout) == 0
def test_main():
"""Test that uname returns the correct values, and errors when appropriate."""
uname = os.uname()
uname_smr = f"{uname.sysname} {uname.release} {uname.machine}\n"
uname_a = f"{uname.sysname} {uname.nodename} {uname.release} {uname.version} {uname.machine}\n"
assert check(["uname"]).stdout == uname.sysname + "\n"
assert check(["uname", "-m"]).stdout == uname.machine + "\n"
assert check(["uname", "-n"]).stdout == uname.nodename + "\n"
assert check(["uname", "-r"]).stdout == uname.release + "\n"
assert check(["uname", "-s"]).stdout == uname.sysname + "\n"
assert check(["uname", "-v"]).stdout == uname.version + "\n"
assert check(["uname", "-smr"]).stdout == uname_smr
assert check(["uname", "-mnrsv"]).stdout == uname_a
assert check(["uname", "-a"]).stdout == uname_a
assert check_fail(["uname", "-x"]).stderr.startswith("uname: Invalid")
assert check_fail(["uname", "x"]).stderr.startswith("uname: Invalid")
def test_nonexistent_paths(tmpdir_factory):
"""Passing nonexistent paths reports an error."""
data = Path(tmpdir_factory.mktemp("data"))
dir1 = data / "dir1"
dir2 = data / "dir2"
assert not dir1.exists()
assert not dir2.exists()
with chdir(data):
ret = check_fail(["rmdir", str(dir1)])
assert ret.stdout == ""
assert ret.stderr != ""
with chdir(data):
ret = check_fail(["rmdir", str(dir1), str(dir2)])
assert ret.stdout == ""
assert ret.stderr != ""
def test_main():
"""Running `date` should print the current date, using the appropriate
format string.
TODO: The same tests, but UTC (with -u)."""
# Default format string.
assert check(["date"]).stdout == time.strftime("%a %b %e %H:%M:%S %Z %Y\n")
assert len(check(["date"]).stderr) == 0
# Format string for ISO 8601.
assert check(["date", "+%FT%TZ"]).stdout == time.strftime("%FT%TZ\n")
assert len(check(["date", "+%FT%TZ"]).stderr) == 0
# Example without a leading + sign.
assert len(check_fail(["date", "%H:%M:%S"]).stdout) == 0
assert "Invalid date string" in check_fail(["date", "%H:%M:%S"]).stderr
def test_no_flags(tree):
"""Test without -f, -i, or -r/-R."""
data, a, b = tree
assert f"cannot remove '{data}': " in check_fail(["rm", str(data)]).stderr
assert data.exists()
assert a.exists()
assert b.exists()
ret = check(["rm", str(a)])
assert len(ret.stdout) == 0
assert len(ret.stderr) == 0
def test_nonexistent_filepath(tmpdir_factory):
"""Passing a nonexistent filepath reports an error."""
data = Path(tmpdir_factory.mktemp("data"))
path = data / "file1.txt"
assert not path.exists()
ret = check_fail(["unlink", str(path)])
assert ret.stdout == ""
assert len(ret.stderr) > 0
assert not path.exists()
def test_file1_and_file2_do_not_exist(tmpdir_factory):
"""If the source filepath and destination filepath don't exist, raises an error."""
data = Path(tmpdir_factory.mktemp("data"))
file1 = data / "file1.txt"
file2 = data / "file2.txt"
assert not file1.exists()
assert not file2.exists()
ret = check_fail(["link", str(file1), str(file2)])
assert ret.stdout == ""
assert len(ret.stderr) > 0
assert not file1.exists()
assert not file2.exists()
def test_file1_does_not_exist(tmpdir_factory):
"""If the source filepath does not exist, raises an error."""
data = Path(tmpdir_factory.mktemp("data"))
file1 = data / "file1.txt"
file2 = data / "file2.txt"
file2_text = "this should not be overwritten"
file2.write_text(file2_text)
assert not file1.exists()
assert file2.read_text() == file2_text
ret = check_fail(["link", str(file1), str(file2)])
assert ret.stdout == ""
assert len(ret.stderr) > 0
assert not file1.exists()
assert file2.read_text() == file2_text
def test_file2_exists(tmpdir_factory):
"""If the destination filepath exists, raises an error."""
data = Path(tmpdir_factory.mktemp("data"))
file1 = data / "file1.txt"
file2 = data / "file2.txt"
file1_text = "hello, world!"
file1.write_text(file1_text)
file2_text = "this should not be overwritten"
file2.write_text(file2_text)
assert file1.read_text() == file1_text
assert file2.read_text() == file2_text
ret = check_fail(["link", str(file1), str(file2)])
assert ret.stdout == ""
assert len(ret.stderr) > 0
assert file1.read_text() == file1_text
assert file2.read_text() == file2_text
def test_extra_args():
"""Passing more than one directory should raise an error."""
assert check_fail(["mkdir", "a", "b"]).stderr.startswith("mkdir:")
assert check_fail(["mkdir", "-p", "a", "b"]).stderr.startswith("mkdir:")
assert check_fail(["mkdir", "-m", "777", "a",
"b"]).stderr.startswith("mkdir:")
def test_missing_args():
"""No args => error of the form `mkdir: ...`"""
assert check_fail(["mkdir"]).stderr.startswith("mkdir:")
def test_extra_args():
"""Nothing to test: `date` accepts any number of arguments."""
assert len(check_fail(["date", "a", "b"]).stderr) > 0