def test_diff_has_diff(exit_code, isatty, expect_reproducible_diff,
expected_return_value, capfd, mocker, tmpdir):
mocker.patch.object(sys.stdout, "isatty", return_value=isatty)
project_dir = cruft.create("https://github.com/cruft/cookiecutter-test",
Path(tmpdir),
directory="dir",
checkout="diff")
(project_dir / "file0").write_text("new content 0\n")
(project_dir / "dir0/file1").write_text("new content 1\n")
(project_dir / "dir0/file2").unlink()
assert cruft.diff(project_dir,
exit_code=exit_code) == expected_return_value
captured = capfd.readouterr()
stdout = captured.out
stderr = captured.err
assert stderr == ""
expected_output = """diff --git a{tmpdir}/dir0/file1 b{tmpdir}/dir0/file1
index ac3e272..eaae237 100644
--- a{tmpdir}/dir0/file1
+++ b{tmpdir}/dir0/file1
@@ -1 +1 @@
-content1
+new content 1
diff --git a{tmpdir}/file0 b{tmpdir}/file0
index 1fc03a9..be6a56b 100644
--- a{tmpdir}/file0
+++ b{tmpdir}/file0
@@ -1 +1 @@
-content0
+new content 0
"""
expected_output_regex = re.escape(expected_output)
expected_output_regex = expected_output_regex.replace(
r"\{tmpdir\}", r"([^\n]*)")
expected_output_regex = fr"^{expected_output_regex}$"
match = re.search(expected_output_regex, stdout, re.MULTILINE)
assert match is not None
if expect_reproducible_diff:
# If the output is not displayed to the user (for example when piping the result
# of the "cruft diff" command) or if the user requested an exit code, we must make
# sure the absolute path to the temporary directory does not appear in the diff
# because the user might want to process the output.
# Conversely, when the output is suposed to be displayed to the user directly (e.g.
# when running "cruft diff" command directly in a terminal), absolute path to the
# actual files on disk may be displayed because git diff command is called directly
# without reprocessing by cruft. This delegates diff coloring and paging to git which
# improves user experience. As far as I know, there is no way to ask git diff to not
# display this path.
assert set(match.groups()) == {""}
def test_diff_no_diff(exit_code, capfd, mocker, tmpdir):
project_dir = cruft.create(
"https://github.com/cruft/cookiecutter-test", Path(tmpdir), directory="dir", checkout="diff"
)
assert cruft.diff(project_dir, exit_code=exit_code) is True
captured = capfd.readouterr()
stdout = captured.out
stderr = captured.err
assert stdout == ""
assert stderr == ""
def test_diff_checkout(capfd, tmpdir):
project_dir = cruft.create(
"https://github.com/samj1912/cookiecutter-test",
Path(tmpdir),
directory="dir",
checkout="master",
)
assert cruft.diff(project_dir, exit_code=True, checkout="updated") is False
captured = capfd.readouterr()
stdout = captured.out
stderr = captured.err
assert stderr == ""
assert "--- a/README.md" in stdout
assert "+++ b/README.md" in stdout
assert "+Updated again" in stdout
assert "-Updated" in stdout
