tests: add extra check to cover bin_paths

Signed-off-by: Henry Schreiner <[email protected]>

tests/test_virtualenv.py

@@ -442,10 +442,12 @@ def test_create(
         assert dir_.join("Scripts", "python.exe").check()
         assert dir_.join("Scripts", "pip.exe").check()
         assert dir_.join("Lib").check()
+        assert str(dir_.join("Scripts")) in venv.bin_paths
     else:
         assert dir_.join("bin", "python").check()
         assert dir_.join("bin", "pip").check()
         assert dir_.join("lib").check()
+        assert str(dir_.join("bin")) in venv.bin_paths
 
     # Test running create on an existing environment. It should be deleted.
     dir_.ensure("test.txt")
@@ -557,6 +559,8 @@ def test_reuse_conda_environment(
 ) -> None:
     venv, _ = make_one(reuse_existing=True, venv_backend="conda")
     venv.create()
+    assert venv.bin_paths
+    assert venv.bin_paths[-1].endswith("bin")
 
     venv, _ = make_one(reuse_existing=True, venv_backend="conda")
     reused = not venv.create()