Add test case for pip hash checking mode

tests/test-pip-hash-checking/environment.yml

@@ -0,0 +1,8 @@
+# environment.yml
+channels:
+  - conda-forge
+
+dependencies:
+  - pip
+  - pip:
+    - flit-core === 3.9.0 --hash=sha256:1234

tests/test_conda_lock.py

@@ -156,6 +156,13 @@ def pip_environment_different_names_same_deps(tmp_path: Path):
     )
 
 
+@pytest.fixture
+def pip_hash_checking_environment(tmp_path: Path):
+    return clone_test_dir("test-pip-hash-checking", tmp_path).joinpath(
+        "environment.yml"
+    )
+
+
 @pytest.fixture
 def pip_local_package_environment(tmp_path: Path):
     return clone_test_dir("test-local-pip", tmp_path).joinpath("environment.yml")
@@ -1508,6 +1515,22 @@ def test_run_lock_with_pip_environment_different_names_same_deps(
     run_lock([pip_environment_different_names_same_deps], conda_exe=conda_exe)
 
 
+def test_run_lock_with_pip_hash_checking(
+    monkeypatch: "pytest.MonkeyPatch",
+    pip_hash_checking_environment: Path,
+    conda_exe: str,
+):
+    work_dir = pip_hash_checking_environment.parent
+    monkeypatch.chdir(work_dir)
+    if is_micromamba(conda_exe):
+        monkeypatch.setenv("CONDA_FLAGS", "-v")
+    run_lock([pip_hash_checking_environment], conda_exe=conda_exe)
+
+    lockfile = parse_conda_lock_file(work_dir / DEFAULT_LOCKFILE_NAME)
+    hashes = {package.name: package.hash for package in lockfile.package}
+    assert hashes["flit-core"].sha256 == "1234"
+
+
 def test_run_lock_uppercase_pip(
     monkeypatch: "pytest.MonkeyPatch",
     env_with_uppercase_pip: Path,