minstall: Add --dry-run option

Closes: #1281

1 files changed, 14 insertions, 5 deletions

diff --git a/run_unittests.py b/run_unittests.py
index 2b8812a..da13753 100755
--- a/run_unittests.py
+++ b/run_unittests.py
@@ -2270,11 +2270,13 @@ class AllPlatformTests(BasePlatformTests):
         expected = {installpath: 0}
         for name in installpath.rglob('*'):
             expected[name] = 0
-        # Find logged files and directories
-        with Path(self.builddir, 'meson-logs', 'install-log.txt').open() as f:
-            logged = list(map(lambda l: Path(l.strip()),
-                              filter(lambda l: not l.startswith('#'),
-                                     f.readlines())))
+        def read_logs():
+            # Find logged files and directories
+            with Path(self.builddir, 'meson-logs', 'install-log.txt').open() as f:
+                return list(map(lambda l: Path(l.strip()),
+                                  filter(lambda l: not l.startswith('#'),
+                                         f.readlines())))
+        logged = read_logs()
         for name in logged:
             self.assertTrue(name in expected, 'Log contains extra entry {}'.format(name))
             expected[name] += 1
@@ -2283,6 +2285,13 @@ class AllPlatformTests(BasePlatformTests):
             self.assertGreater(count, 0, 'Log is missing entry for {}'.format(name))
             self.assertLess(count, 2, 'Log has multiple entries for {}'.format(name))
 
+        # Verify that with --dry-run we obtain the same logs but with nothing
+        # actually installed
+        windows_proof_rmtree(self.installdir)
+        self._run(self.meson_command + ['install', '--dry-run', '--destdir', self.installdir], workdir=self.builddir)
+        self.assertEqual(logged, read_logs())
+        self.assertFalse(os.path.exists(self.installdir))
+
     def test_uninstall(self):
         exename = os.path.join(self.installdir, 'usr/bin/prog' + exe_suffix)
         testdir = os.path.join(self.common_test_dir, '8 install')