chore: import upstream snapshot with attribution

python/tests/commands/builtin/github/test_sed.py

@@ -0,0 +1,103 @@
+# ========= 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. =========
+"""sed over the read-only GitHub mount (factory-built command).
+
+GitHub is read-only: `sed` is a read-transform (output to stdout) and `-i` is
+rejected. Exercises the generic sed builder wiring for github (index-aware
+read, write-gated -i).
+"""
+
+import pytest
+
+from mirage.commands.builtin.github import COMMANDS
+from mirage.io.stream import materialize
+from mirage.types import PathSpec
+from tests.fixtures.github_mock import MOCK_BLOBS
+
+
+@pytest.fixture(autouse=True)
+def _patch_read(monkeypatch):
+
+    async def _read_bytes(config, owner, repo, sha):
+        return MOCK_BLOBS[sha]
+
+    monkeypatch.setattr("mirage.core.github.read.read_bytes", _read_bytes)
+
+
+def _sed_command():
+    for cmd in COMMANDS:
+        for rc in cmd._registered_commands:
+            if rc.name == "sed":
+                return cmd
+    raise LookupError("sed not registered for github")
+
+
+sed = _sed_command()
+
+
+def _scope(path: str) -> PathSpec:
+    norm = "/" + path.lstrip("/")
+    directory = norm.rsplit("/", 1)[0] + "/"
+    return PathSpec(resource_path=(norm).strip("/"),
+                    virtual=norm,
+                    directory=directory,
+                    resolved=True)
+
+
+async def _run(accessor, index, path, expr, **kwargs):
+    stdout, io = await sed(accessor, [_scope(path)],
+                           expr,
+                           index=index,
+                           **kwargs)
+    data = await materialize(stdout) if stdout is not None else b""
+    return data.decode(errors="replace"), io
+
+
+@pytest.mark.asyncio
+async def test_sed_read_transform(mock_github_api, github_env):
+    accessor, index = github_env
+    text, io = await _run(accessor, index, "src/main.py", "s/import/IMPORT/")
+    assert io.exit_code == 0
+    # First match on each line (non-global), matching GNU sed.
+    assert text == ("IMPORT os\nIMPORT sys\n"
+                    "from src.utils IMPORT helper\n"
+                    "\nasync def main():\n    pass\n")
+
+
+@pytest.mark.asyncio
+async def test_sed_global(mock_github_api, github_env):
+    accessor, index = github_env
+    text, io = await _run(accessor, index, "src/utils.py", "s/e/E/g")
+    assert io.exit_code == 0
+    assert "dEf hElpEr():" in text
+    assert "rEturn 42" in text
+
+
+@pytest.mark.asyncio
+async def test_sed_address_delete(mock_github_api, github_env):
+    accessor, index = github_env
+    text, io = await _run(accessor, index, "src/main.py", "/^import/d")
+    assert io.exit_code == 0
+    # The two leading `import` lines are dropped; `from ... import` stays.
+    assert "import os" not in text
+    assert "import sys" not in text
+    assert "from src.utils import helper" in text
+
+
+@pytest.mark.asyncio
+async def test_sed_inplace_rejected(mock_github_api, github_env):
+    accessor, index = github_env
+    with pytest.raises(PermissionError,
+                       match="-i not supported on this backend"):
+        await _run(accessor, index, "src/main.py", "s/import/X/", i=True)