test: Ensure executor accepts links

tests/installation/test_executor.py

@@ -327,3 +327,60 @@ def test_executor_should_check_every_possible_hash_types_before_failing(
             Install(package),
             Link("https://example.com/demo-0.1.0-py2.py3-none-any.whl"),
         )
+
+
+def test_executor_should_hash_links(
+    config, io, pool, mocker, fixture_dir, tmp_dir
+):
+    # Produce a file:/// URI that is a valid link
+    link = Link(fixture_dir("distributions").joinpath(
+            "demo-0.1.0-py2.py3-none-any.whl"
+        ).as_uri())
+    mocker.patch.object(
+        Chef, "get_cached_archive_for_link", side_effect=lambda _: link,
+    )
+
+    env = MockEnv(path=Path(tmp_dir))
+    executor = Executor(env, pool, config, io)
+
+    package = Package("demo", "0.1.0")
+    package.files = [
+        {
+            "file": "demo-0.1.0-py2.py3-none-any.whl",
+            "hash": "md5:15507846fd4299596661d0197bfb4f90",
+        }
+    ]
+
+    archive = executor._download_link(
+        Install(package), Link("https://example.com/demo-0.1.0-py2.py3-none-any.whl")
+    )
+
+    assert archive == link
+
+
+def test_executor_should_hash_paths(
+    config, io, pool, mocker, fixture_dir, tmp_dir
+):
+    link = fixture_dir("distributions").joinpath(
+            "demo-0.1.0-py2.py3-none-any.whl"
+        )
+    mocker.patch.object(
+        Chef, "get_cached_archive_for_link", side_effect=lambda _: link,
+    )
+
+    env = MockEnv(path=Path(tmp_dir))
+    executor = Executor(env, pool, config, io)
+
+    package = Package("demo", "0.1.0")
+    package.files = [
+        {
+            "file": "demo-0.1.0-py2.py3-none-any.whl",
+            "hash": "md5:15507846fd4299596661d0197bfb4f90",
+        }
+    ]
+
+    archive = executor._download_link(
+        Install(package), Link("https://example.com/demo-0.1.0-py2.py3-none-any.whl")
+    )
+
+    assert archive == link