Initial test framework added.

Makefile.in

@@ -42,6 +42,7 @@ LIBS      = @LIBS@
 STRIP     = strip
 
 INSTALL_ROOT ?= $(DESTDIR)
+PYTHON ?= python3
 
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
@@ -101,4 +102,10 @@ love:
 spell:
 	codespell -S .git,tools
 
+test:   all
+	(cd test && $(PYTHON) test.py)
+
+
+.PHONY:	test
+
 # eof

test/test.py

@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+#
+# test.py -- Unit tests for jpeginfo
+#
+# Copyright (C) 2023 Timo Kokkonen <[email protected]>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+"""jpeginfo unit tester"""
+
+import unittest
+import subprocess
+
+class JpeginfoTests(unittest.TestCase):
+    """jpeginfo test cases"""
+
+    program = '../jpeginfo'
+    debug = False
+
+    def run_test(self, args, check=True):
+        """execute jpeginfo for a test"""
+        command = [self.program]
+        if isinstance(args, list):
+            command.extend(args)
+        else:
+            if len(args) > 0:
+                command.append(args)
+        res = subprocess.run(command, encoding="utf-8", check=check,
+                             stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+        output = res.stdout
+        if self.debug:
+            print(res)
+        return output, res.returncode
+
+
+    def test_version(self):
+        """test version information output"""
+        output, _ = self.run_test('--version')
+        self.assertIn('GNU General Public License', output)
+        self.assertRegex(output, r'jpeginfo v\d+\.\d+\.\d')
+
+    def test_noarguments(self):
+        """test running withouth arguments"""
+        output, res = self.run_test('', check=False)
+        self.assertEqual(1, res)
+        self.assertIn('file arguments missing', output)
+
+    def test_basic(self):
+        """test basic output"""
+        output, _ = self.run_test('jpeginfo_test1.jpg')
+        self.assertRegex(output,
+                         r'jpeginfo_test1.jpg\s+2100\s+x\s+1500\s+24bit\s+'
+                         r'P\s+Exif,IPTC,XMP,ICC,Adobe,UNKNOWN\s+320159')
+
+if __name__ == '__main__':
+    unittest.main()
+
+
+# eof :-)