test(cryptsetup): add a skip condition

Author: akinomyoga

test/t/test_cryptsetup.py

@@ -10,6 +10,10 @@ def test_1(self, completion):
     def test_2(self, completion):
         assert completion
 
-    @pytest.mark.complete("cryptsetup luksE", require_cmd=True)
+    @pytest.mark.complete(
+        "cryptsetup luksE",
+        require_cmd=True,
+        skipif='! strings "$(type -P cryptsetup)" | grep -qFx luksErase',
+    )
     def test_github_issue758(self, completion):
         assert completion == "rase"