test: test cases for .exe suffix

Author: iamdefinitelyahuman

tests/test_install.py

@@ -0,0 +1,6 @@
+import vvm
+
+
+def test_get_installed_vyper_versions(all_versions):
+    assert "exe" not in str(all_versions)
+    assert all_versions in vvm.install.get_installed_vyper_versions()