tests/lib: Add a new unittest type to simplify launching test programs

We were reusing the same logic everywhere, while we can just reuse an
unique class to base our tests on that avoids having to copy-and-paste
code for no good reason

gobject/tests/gobject-query.py

@@ -20,19 +20,13 @@
 
 """Integration tests for gobject-query utility."""
 
-import collections
-import os
-import shutil
-import subprocess
 import unittest
 
 import taptestrunner
+import testprogramrunner
 
 
-Result = collections.namedtuple("Result", ("info", "out", "err"))
-
-
-class TestGobjectQuery(unittest.TestCase):
+class TestGobjectQuery(testprogramrunner.TestProgramRunner):
     """Integration test for running gobject-query.
 
     This can be run when installed or uninstalled. When uninstalled, it
@@ -42,44 +36,10 @@ class TestGobjectQuery(unittest.TestCase):
     handling of command line arguments, and its exit statuses.
     """
 
-    def setUp(self):
-        self.timeout_seconds = 10  # seconds per test
-        if "G_TEST_BUILDDIR" in os.environ:
-            self.__gobject_query = os.path.join(
-                os.environ["G_TEST_BUILDDIR"], "..", "gobject-query"
-            )
-        else:
-            self.__gobject_query = shutil.which("gobject-query")
-        print("gobject-query:", self.__gobject_query)
+    PROGRAM_NAME = "gobject-query"
 
     def runGobjectQuery(self, *args):
-        argv = [self.__gobject_query]
-        argv.extend(args)
-        print("Running:", argv)
-
-        env = os.environ.copy()
-        env["LC_ALL"] = "C.UTF-8"
-        env["G_DEBUG"] = "fatal-warnings"
-        print("Environment:", env)
-
-        # We want to ensure consistent line endings...
-        info = subprocess.run(
-            argv,
-            timeout=self.timeout_seconds,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE,
-            env=env,
-            text=True,
-            encoding="utf-8",
-        )
-        info.check_returncode()
-        out = info.stdout.strip()
-        err = info.stderr.strip()
-
-        result = Result(info, out, err)
-
-        print("Output:", result.out)
-        return result
+        return self.runTestProgram(args)
 
     def test_help(self):
         """Test the --help argument."""