def test_parse(self):
ref = textwrap.dedent("""\
line1
oldline
line2
deleteme
line3
line4
""")
new = textwrap.dedent("""\
line1
newline
line2
line3
insertme
line4
""")
input_lines = list(
difflib.unified_diff(ref.splitlines(True),
new.splitlines(True),
n=0))
# ['--- \n',
# '+++ \n',
# '@@ -2 +2 @@\n',
# '-oldline',
# '+newline',
# '@@ -4 +3,0 @@\n',
# '-deleteme',
# '@@ -5,0 +5 @@\n',
# '+insertme']
difflist = DiffList(ref, new)
with patch("cleverdiff.difflist.DiffHunk") as diffhunk_patch, patch(
"cleverdiff.difflist.DiffHunk._translate_diff_syntax",
return_value=[("change", 2, 2), ("delete", 4, 3),
("insert", 5, 5)],
):
difflist._parse(input_lines)
expected_calls = [
call(
mode="change",
content="-oldline\n+newline\n",
context=Pair(first=":2", second=":2"),
lines=Pair(2, 2),
),
call(
mode="delete",
content="-deleteme\n",
context=Pair(first=":4", second=":3"),
lines=Pair(4, 3),
),
call(
mode="insert",
content="+insertme\n",
context=Pair(first=":5", second=":5"),
lines=Pair(5, 5),
),
]
assert expected_calls == diffhunk_patch.mock_calls
def test_from_files(self):
filetext1 = textwrap.dedent("""\
suite foo
family bar
edit FOOBAR 5
task baz
endfamily
endsuite
""")
filetext2 = filetext1.replace("baz", "boo")
expected = [
d.context_to_string(no_labels=True)
for d in DiffList(filetext1, filetext2)._diffs
]
with tempfile.NamedTemporaryFile(mode="w+t", delete=False) as file1:
file1.write(filetext1)
file1.seek(0)
with tempfile.NamedTemporaryFile(mode="w+t",
delete=False) as file2:
file2.write(filetext2)
file2.seek(0)
actual = [
d.context_to_string(no_labels=True)
for d in DiffList.from_files(file1.name, file2.name)._diffs
]
assert expected == actual
def test_from_files_error(self):
"""
Test that the correct exception is raised when attempting to
load from a file that cannot be found.
"""
# Create an empty temporary directory:
tmpdir = tempfile.mkdtemp()
# Construct a path to a file that does not exist:
invalid_file_path = os.path.join(tmpdir, "file1.def")
# Verify that the correct exception is raised when the file is not
# found, making sure to clean up the temporary directory before the
# test exits regardless of the outcome.
try:
with pytest.raises(IOError) as excinfo:
DiffList.from_files(invalid_file_path, invalid_file_path)
expected_msg = "failed to load from file"
assert expected_msg in str(excinfo.value)
finally:
os.rmdir(tmpdir)
def test_delete_one(self):
ref = textwrap.dedent("""\
line1
deleteme
line2
""").splitlines()
new = textwrap.dedent("""\
line1
line2
""").splitlines()
syntax, = [
i.strip() for i in difflib.unified_diff(ref, new, n=0)
if i.startswith("@@")
]
assert syntax == "@@ -2 +1,0 @@"
expected = ("delete", 2, 1) # "d",start1,start2
actual = DiffList._translate_diff_syntax(syntax)
assert actual == expected
def test_change_one(self):
ref = textwrap.dedent("""\
line1
oldline
line2
""").splitlines()
new = textwrap.dedent("""\
line1
newline
line2
""").splitlines()
syntax, = [
i.strip() for i in difflib.unified_diff(ref, new, n=0)
if i.startswith("@@")
]
assert syntax == "@@ -2 +2 @@"
expected = ("change", 2, 2) # "c",start1,start2
actual = DiffList._translate_diff_syntax(syntax)
assert actual == expected
def test_insert_many(self):
ref = textwrap.dedent("""\
line1
line4
""").splitlines()
new = textwrap.dedent("""\
line1
line2
line3
line4
""").splitlines()
syntax, = [
i.strip() for i in difflib.unified_diff(ref, new, n=0)
if i.startswith("@@")
]
assert syntax == "@@ -1,0 +2,2 @@"
expected = ("insert", 1, 2)
actual = DiffList._translate_diff_syntax(syntax)
assert actual == expected
def test_malformed1(self):
expected_msg = "malformed unified diff hunk syntax"
syntax = "@@ 7 @@"
with pytest.raises(ValueError) as excinfo:
DiffList._translate_diff_syntax(syntax)
assert expected_msg in str(excinfo.value)
syntax = "@@ 7 10 0 @@"
with pytest.raises(ValueError) as excinfo:
DiffList._translate_diff_syntax(syntax)
assert expected_msg in str(excinfo.value)
syntax = "@@ 2,3 4,5"
with pytest.raises(ValueError) as excinfo:
DiffList._translate_diff_syntax(syntax)
assert expected_msg in str(excinfo.value)
def test_insert_one(self):
ref = textwrap.dedent("""\
line1
line2
""").splitlines()
new = textwrap.dedent("""\
line1
insert
line2
""").splitlines()
syntax, = [
i.strip() for i in difflib.unified_diff(ref, new, n=0)
if i.startswith("@@")
]
# unified diff hunk format:
# @@ -start,count +start,count @@
# -start and +start are starting line numbers in first and second file
# count is omitted if 1
# see https://www.gnu.org/software/diffutils/manual/html_node/Detailed-Unified.html#Detailed-Unified
assert syntax == "@@ -1,0 +2 @@"
expected = ("insert", 1, 2) # "i",start1,start2
actual = DiffList._translate_diff_syntax(syntax)
assert actual == expected