refactor: Improve e2e test performance

I don't need to download and clone an entire respository (though it's a nice test).
Using a locally created repository instead makes the test easier to review and faster to execute.

.gitignore

@@ -6,6 +6,7 @@
 
 # Generated Project Files
 repo
+tmp
 
 # Byte-compiled / optimized / DLL files
 __pycache__/

git_authorship/cli.py

@@ -8,7 +8,9 @@
 import shutil
 from dataclasses import dataclass
 from pathlib import Path
+from typing import Iterable
 from typing import Optional
+from typing import Union
 
 from git import Repo
 
@@ -90,7 +92,10 @@ def clone_and_checkout(args: Args):
     return repo
 
 
-def run(args: Args):
+def run(args: Union[Args, Iterable[str]]):
+    if isinstance(args, Iterable):
+        args = parse_args(args)
+
     repo = clone_and_checkout(args)
     repo_authorship = authorship.for_repo(
         repo,

test/fixtures/licensing.csv

@@ -1 +1 @@
-Joseph Hale <[email protected]>,MPL-2.0
+Alice <[email protected]>,MPL-2.0

test/fixtures/tmp_repo.py

@@ -0,0 +1,56 @@
+from pathlib import Path
+from typing import List
+from typing import Tuple
+from typing import Union
+
+from git import Actor
+from git import Repo
+
+Message = str
+AuthorName = str
+AuthorEmail = str
+
+CommitMessage = Tuple[Message, AuthorName, AuthorEmail]
+
+FilePath = str
+FileContent = Union[List[str], str]
+Change = Tuple[FilePath, FileContent]
+
+
+class TemporaryRepository:
+    def __init__(self, directory: str):
+        self._repo = Repo.init(directory)
+        self._index = self._repo.index
+
+    @property
+    def dir(self):
+        return self._repo.working_dir
+
+    @property
+    def branch(self) -> str:
+        return self._repo.active_branch.name
+
+    def set_file(self, path: str, content: Union[str, List[str]]):
+        """
+        Updates a file in the repository to the given content, creating it if necessary.
+        """
+        if isinstance(content, list):
+            content = "\n".join(content)
+
+        with open(Path(self.dir) / path, "w") as f:
+            f.write(content)
+
+        self._index.add(path)
+
+    def append_file(self, path: str, content: Union[str, List[str]]):
+        if isinstance(content, list):
+            content = "\n".join(content)
+
+        with open(Path(self.dir) / path, "a") as f:
+            f.write(content)
+
+        self._index.add(path)
+
+    def commit(self, message: str, author_name: str, author_email: str):
+        author = Actor(author_name, author_email)
+        self._index.commit(message, author=author)

test/snapshots/test_e2e/test_typical_workflow/authorship.csv

@@ -0,0 +1,5 @@
+path,author,lines,license
+.,Alice <[email protected]>,1,
+.,Bob <[email protected]>,1,
+greeting.txt,Alice <[email protected]>,1,
+greeting.txt,Bob <[email protected]>,1,

test/snapshots/test_e2e/test_workflow_with_author_licenses/authorship.csv

@@ -0,0 +1,5 @@
+path,author,lines,license
+.,Alice <[email protected]>,1,MPL-2.0
+.,Bob <[email protected]>,1,
+greeting.txt,Alice <[email protected]>,1,MPL-2.0
+greeting.txt,Bob <[email protected]>,1,

test/test_e2e.py

@@ -1,32 +1,41 @@
-from git_authorship.cli import Args
+from tempfile import TemporaryDirectory
+from test.fixtures.tmp_repo import TemporaryRepository
+
+import pytest
+
 from git_authorship.cli import run
 
 
-def test_full_workflow(snapshot):
-    run(
-        Args(
-            location="https://github.com/thehale/git-authorship",
-            clone_to="./build/test/e2e",
-            branch="b655cc6c634a52660d3d2e87f9978343c92aa998",
-            author_licenses_path=None,
-            use_cache=False,
-        )
-    )
+@pytest.fixture
+def repo():
+    with TemporaryDirectory() as d:
+        repo = TemporaryRepository(d)
+
+        repo.set_file("greeting.txt", "Hello, world!\n")
+        repo.commit("Initial commit", "Alice", "[email protected]")
+
+        repo.append_file("greeting.txt", "Excited to be here!\n")
+        repo.commit("Second commit", "Bob", "[email protected]")
+
+        yield repo
+
+
+def test_typical_workflow(snapshot, repo: TemporaryRepository):
+    run([repo.dir, "--clone-to", "./tmp", "--no-cache"])
 
     with open("build/authorship.csv", "r") as f:
         snapshot.assert_match(f.read(), "authorship.csv")
 
 
-def test_full_workflow_with_author_licenses(snapshot):
-    run(
-        Args(
-            location="https://github.com/thehale/git-authorship",
-            clone_to="./build/test/e2e",
-            branch="b655cc6c634a52660d3d2e87f9978343c92aa998",
-            author_licenses_path="./test/fixtures/licensing.csv",
-            use_cache=False,
-        )
-    )
+def test_workflow_with_author_licenses(snapshot, repo: TemporaryRepository):
+    # fmt: off
+    run([ 
+        repo.dir,
+        "--author-licenses", "./test/fixtures/licensing.csv",
+        "--clone-to", "./tmp",
+        "--no-cache",
+    ])
+    # fmt: on
 
     with open("build/authorship.csv", "r") as f:
         snapshot.assert_match(f.read(), "authorship.csv")