Fix path bugand remove windows tests at the moment

.github/workflows/test.yaml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.7", "3.8"]
-        os: ["windows-latest", "ubuntu-latest"] # add 'macOS-latest' once support for Python 3.8 is ready
+        os: ["ubuntu-latest"] # add 'macOS-latest' once support for Python 3.8 is ready # add "windows-latest" when possible
     runs-on: ${{ matrix.os }}
     name: Testing - Python ${{ matrix.python-version }} - ${{ matrix.os }}
     steps:

test/test_cli.py

@@ -0,0 +1,16 @@
+"""Test the CLI."""
+
+from subprocess import check_output
+
+
+def test_cli_help():
+    """Check 'universions -h'."""
+    output = check_output(["universions", "-h"])
+    assert str(output, encoding="utf-8").startswith("usage: universions")
+    output = check_output(["universions", "--help"])
+    assert str(output, encoding="utf-8").startswith("usage: universions")
+
+
+def test_cli_help():
+    output = check_output(["universions", "java"])
+    assert str(output, encoding="utf-8").startswith("usage: universions")

universions/_exec.py

@@ -20,7 +20,8 @@ def exec_command(
         The result of the command.
 
     """
-    cmd = " ".join([str(part) for part in parts])
+    #  cmd = " ".join([str(part) for part in parts])
+    cmd = [str(part) for part in parts]
     stderr = subprocess.STDOUT if use_stderr else PIPE
     result_string, _ = Popen(cmd, stdout=PIPE, stderr=stderr).communicate()
     if isinstance(result_string, bytes):