Adding translate test

tests/test_translate.py

@@ -0,0 +1,28 @@
+# Setting French as system language
+import os
+os.environ['LC_ALL'] = 'fr_FR.utf-8'
+
+import pytest
+import sys
+
+from plumbum import cli
+
+class Simple(cli.Application):
+    foo = cli.SwitchAttr("--foo")
+
+    def main(self):
+        pass
+
+class TestFRCLI:
+    def test_nolang_switches(self):
+        _, rc = Simple.run(["foo", "-h"], exit = False)
+        assert rc == 0
+        _, rc = Simple.run(["foo", "--version"], exit = False)
+        assert rc == 0
+
+    def test_help_lang(self, capsys):
+        _, rc = Simple.run(["foo", "-h"], exit = False)
+        assert rc == 0
+        stdout, stderr = capsys.readouterr()
+        assert "Utilisation" in stdout
+        assert "Imprime ce message d'aide et sort" in stdout