From 07e04b19a10137eb57032a908520163feb9cdbf9 Mon Sep 17 00:00:00 2001
From: Marco Betschart <email@marco.betschart.name>
Date: Tue, 25 Jan 2022 10:49:18 +0100
Subject: [PATCH] Experimenting with GLib.TestSuite and TestCase

---
 meson.build              |  3 ++-
 tests/Tests.vala         |  6 +++++-
 tests/Util.vala          | 37 +++++++++++++++++++++++++++++++++++--
 vapi/glib-2.0-fixes.vapi |  6 ++++++
 4 files changed, 48 insertions(+), 4 deletions(-)
 create mode 100644 vapi/glib-2.0-fixes.vapi

diff --git a/meson.build b/meson.build
index c3001d5..969aa11 100644
--- a/meson.build
+++ b/meson.build
@@ -22,7 +22,8 @@ dependencies = [
     dependency('gtk+-3.0'),
     dependency('granite', version: '>=0.5'),
     dependency('libhandy-1', version: '>=0.83.0'),
-    meson.get_compiler('c').find_library('m', required : false)
+    meson.get_compiler('c').find_library('m', required : false),
+    meson.get_compiler('vala').find_library('glib-2.0-fixes', dirs: meson.current_source_dir() / 'vapi')
 ]
 
 subdir('src')
diff --git a/tests/Tests.vala b/tests/Tests.vala
index 9c04207..983d522 100644
--- a/tests/Tests.vala
+++ b/tests/Tests.vala
@@ -24,7 +24,11 @@ namespace Tests {
     int main(string[] args) {
         Test.init (ref args);
 
-        Test.add_func("/Tests/Util/test_truncating_reminder", Tests.Util.test_truncating_remainder);
+        // Using GLib.TestSuite allows for set_up/tear_down methods:
+        Test.get_root ().add(new Util.TruncatingRemainder ());
+
+        // If we don't need the set_up/tear_down methods, we can simply register a function:
+        Test.add_func("/Util/truncating_remaindssser", Util.test_truncating_remainder);
 
         return Test.run();
     }
diff --git a/tests/Util.vala b/tests/Util.vala
index eeb353d..e1330c3 100644
--- a/tests/Util.vala
+++ b/tests/Util.vala
@@ -21,8 +21,41 @@
 
 namespace Tests.Util {
 
+    class TruncatingRemainder : TestCase {
+
+        // test env variables need to be static:
+        private static string test_value = null;
+
+        public TruncatingRemainder () {
+            base (
+                "TruncatingRemainder",
+                set_up,  // or: null
+                test,
+                tear_down  // or: null
+            );
+        }
+
+        void set_up () {
+            test_value = "my-test-value";
+        }
+
+        void test () {
+            assert_true (1.0 == Timer.Util.truncating_remainder (5.0, 4.0));
+            assert_true (0.0 == Timer.Util.truncating_remainder (7.0, 7.0));
+
+            assert_nonnull (test_value);
+            assert_true ("my-test-value" == test_value);
+            // https://docs.gtk.org/glib/func.assert_cmpstr.html
+            // assert_cmpstr (test_value, ==, "my-test-value");
+        }
+
+        void tear_down () {
+            test_value = null;
+        }
+    }
+
     void test_truncating_remainder () {
-        assert (1.0 == Timer.Util.truncating_remainder (5.0, 4.0));
-        assert (0.0 == Timer.Util.truncating_remainder (7.0, 7.0));
+        assert_true (1.0 == Timer.Util.truncating_remainder (5.0, 4.0));
+        assert_true (0.0 == Timer.Util.truncating_remainder (7.0, 7.0));
     }
 }
\ No newline at end of file
diff --git a/vapi/glib-2.0-fixes.vapi b/vapi/glib-2.0-fixes.vapi
new file mode 100644
index 0000000..29fa36f
--- /dev/null
+++ b/vapi/glib-2.0-fixes.vapi
@@ -0,0 +1,6 @@
+namespace GLib {
+    namespace Test {
+        [CCode (cheader_filename = "glib-2.0/glib/gtestutils.h", cname = "g_test_get_root")]
+        public static TestSuite get_root ();
+    }
+}
\ No newline at end of file