[gobject-introspection] gimarshallingtests: Add GValue round-trip and copy functions

[Emmanuele Bassi <ebassi src gnome org>]

commit 3dd0b22c4ecf69689575d24d28ac9a1afa020b53
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Fri Apr 9 05:15:04 2021 +0200

    gimarshallingtests: Add GValue round-trip and copy functions
    
    We can use them in Gjs to verify whether a value is properly packed
    and unpacked to GValue.

 tests/gimarshallingtests.c | 29 +++++++++++++++++++++++++++++
 tests/gimarshallingtests.h |  6 ++++++
 2 files changed, 35 insertions(+)
---
diff --git a/tests/gimarshallingtests.c b/tests/gimarshallingtests.c
index 37960ea5..d15b2f10 100644
--- a/tests/gimarshallingtests.c
+++ b/tests/gimarshallingtests.c
@@ -3561,6 +3561,35 @@ gi_marshalling_tests_return_gvalue_flat_array (void)
   return array;
 }
 
+/**
+ * gi_marshalling_tests_gvalue_round_trip:
+ * @value: The first GValue
+ *
+ * Returns: (transfer none):
+ */
+GValue *
+gi_marshalling_tests_gvalue_round_trip (GValue *value)
+{
+  return value;
+}
+
+/**
+ * gi_marshalling_tests_gvalue_copy:
+ * @value: The first GValue
+ *
+ * Returns: (transfer none):
+ */
+GValue *
+gi_marshalling_tests_gvalue_copy (GValue *value)
+{
+  GValue *return_value = g_new0 (GValue, 1);
+
+  g_value_init (return_value, G_VALUE_TYPE (value));
+  g_value_copy (value, return_value);
+
+  return return_value;
+}
+
 /**
  * gi_marshalling_tests_gvalue_flat_array_round_trip:
  * @one: The first GValue
diff --git a/tests/gimarshallingtests.h b/tests/gimarshallingtests.h
index 2a8279e6..2f4b259b 100644
--- a/tests/gimarshallingtests.h
+++ b/tests/gimarshallingtests.h
@@ -1147,6 +1147,12 @@ _GI_TEST_EXTERN
 GValue *gi_marshalling_tests_return_gvalue_flat_array (void);
 
 
+_GI_TEST_EXTERN
+GValue *gi_marshalling_tests_gvalue_round_trip (GValue *value);
+
+_GI_TEST_EXTERN
+GValue *gi_marshalling_tests_gvalue_copy (GValue *value);
+
 _GI_TEST_EXTERN
 GValue *gi_marshalling_tests_gvalue_flat_array_round_trip (const GValue one,
                                                            const GValue two,