unit tests: Be more specific in checking for commands

'-w' in c_command will check for it as a substring, which will also
match '-wd', etc. So match it with quotes. This won't give us false
positives, but might give us false negatives in case the argument is not
quoted, but that's better behaviour for a test.

The alternative is to split the string command, but the command does not
necessarily obey shell quoting rules, so we cannot reliably use
shlex.split().

run_unittests.py

@@ -221,15 +221,15 @@ class LinuxlikeTests(unittest.TestCase):
         self.assertIsNotNone(vala_command)
         self.assertIsNotNone(c_command)
         # -w suppresses all warnings, should be there in Vala but not in C
-        self.assertTrue('-w' in vala_command)
-        self.assertFalse('-w' in c_command)
+        self.assertTrue("'-w'" in vala_command)
+        self.assertFalse("'-w'" in c_command)
         # -Wall enables all warnings, should be there in C but not in Vala
-        self.assertFalse('-Wall' in vala_command)
-        self.assertTrue('-Wall' in c_command)
+        self.assertFalse("'-Wall'" in vala_command)
+        self.assertTrue("'-Wall'" in c_command)
         # -Werror converts warnings to errors, should always be there since it's
         # injected by an unrelated piece of code and the project has werror=true
-        self.assertTrue('-Werror' in vala_command)
-        self.assertTrue('-Werror' in c_command)
+        self.assertTrue("'-Werror'" in vala_command)
+        self.assertTrue("'-Werror'" in c_command)
 
     def test_static_compile_order(self):
         '''