chore: import upstream snapshot with attribution

python/tests/commands/builtin/test_patch.py

@@ -0,0 +1,89 @@
+# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
+
+import asyncio
+
+from mirage.resource.ram import RAMResource
+from mirage.types import MountMode
+from mirage.workspace import Workspace
+
+
+def _ws(**files):
+    mem = RAMResource()
+    for path, data in files.items():
+        asyncio.run(mem.write(path, data=data))
+    return Workspace(
+        {"/data": (mem, MountMode.WRITE)},
+        mode=MountMode.WRITE,
+    )
+
+
+def _run_raw(ws, cmd, cwd="/", stdin=None):
+    ws._cwd = cwd
+    io = asyncio.run(ws.execute(cmd, stdin=stdin))
+    return io.stdout, io
+
+
+def _bytes(stdout):
+    if stdout is None:
+        return b""
+    if isinstance(stdout, bytes):
+        return stdout
+    return b"".join(asyncio.run(_collect(stdout)))
+
+
+async def _collect(ait):
+    return [chunk async for chunk in ait]
+
+
+def test_patch_apply():
+    ws = _ws(**{"/hello.txt": b"hello\nworld\n"})
+    diff_text = ("--- a/hello.txt\n"
+                 "+++ b/hello.txt\n"
+                 "@@ -1,2 +1,2 @@\n"
+                 " hello\n"
+                 "-world\n"
+                 "+universe\n")
+    _run_raw(ws, "patch -p1", cwd="/data", stdin=diff_text.encode())
+    stdout, _ = _run_raw(ws, "cat /data/hello.txt")
+    assert b"universe" in _bytes(stdout)
+
+
+def test_patch_i():
+    diff_text = ("--- a/hello.txt\n"
+                 "+++ b/hello.txt\n"
+                 "@@ -1,2 +1,2 @@\n"
+                 " hello\n"
+                 "-world\n"
+                 "+universe\n")
+    ws = _ws(**{
+        "/hello.txt": b"hello\nworld\n",
+        "/fix.patch": diff_text.encode()
+    })
+    _run_raw(ws, "patch -p1 -i /data/fix.patch", cwd="/data")
+    stdout, _ = _run_raw(ws, "cat /data/hello.txt")
+    assert b"universe" in _bytes(stdout)
+
+
+def test_patch_N():
+    diff_text = ("--- a/hello.txt\n"
+                 "+++ b/hello.txt\n"
+                 "@@ -1,2 +1,2 @@\n"
+                 " hello\n"
+                 "-world\n"
+                 "+universe\n")
+    ws = _ws(**{"/hello.txt": b"hello\nuniverse\n"})
+    _run_raw(ws, "patch -p1 -N", cwd="/data", stdin=diff_text.encode())
+    stdout, _ = _run_raw(ws, "cat /data/hello.txt")
+    assert b"universe" in _bytes(stdout)