From 296bbdbf788fe325dd95f206715b1f2527a35cf0 Mon Sep 17 00:00:00 2001
From: Sean Harmer <sean.harmer@kdab.com>
Date: Tue, 11 Jun 2024 10:40:44 +0100
Subject: [PATCH] Add a convenience function to test if a property has a
 binding

Closes #74.
---
 src/kdbindings/property.h       | 9 +++++++--
 tests/property/tst_property.cpp | 9 +++++++++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/kdbindings/property.h b/src/kdbindings/property.h
index 98f4a4c..c88c082 100644
--- a/src/kdbindings/property.h
+++ b/src/kdbindings/property.h
@@ -108,8 +108,8 @@ struct equal_to {
 // Property can declare PropertyNode as a friend
 // class.
 namespace Private {
-    template<typename PropertyType>
-    class PropertyNode;
+template<typename PropertyType>
+class PropertyNode;
 }
 
 /**
@@ -300,6 +300,11 @@ class Property
      */
     Signal<> &destroyed() const { return m_destroyed; }
 
+    /**
+     * Returns true if this Property has a binding associated with it.
+     */
+    bool hasBinding() const noexcept { return m_updater.get() != nullptr; }
+
     /**
      * Assign a new value to this Property.
      *
diff --git a/tests/property/tst_property.cpp b/tests/property/tst_property.cpp
index 3676da5..9776eb0 100644
--- a/tests/property/tst_property.cpp
+++ b/tests/property/tst_property.cpp
@@ -261,6 +261,15 @@ TEST_CASE("Property Updators")
         REQUIRE(slotCalled);
         REQUIRE(updatedValue == 123);
     }
+
+    SUBCASE("Can query a property to see if it has an updater")
+    {
+        Property<int> property(std::make_unique<DummyPropertyUpdater>(7));
+        REQUIRE(property.hasBinding() == true);
+
+        Property<int> property2(7);
+        REQUIRE(property2.hasBinding() == false);
+    }
 }
 
 TEST_CASE("Moving")