Add equality operator for QgsNumericFormat

python/core/auto_generated/numericformats/qgsnumericformat.sip.in

@@ -236,6 +236,9 @@ Writes the format to an XML ``element``.
 .. seealso:: :py:func:`QgsNumericFormatRegistry.createFromXml`
 %End
 
+    bool operator==( const QgsNumericFormat &other ) const;
+    bool operator!=( const QgsNumericFormat &other ) const;
+
 };
 
 /************************************************************************

src/core/numericformats/qgsnumericformat.cpp

@@ -16,6 +16,7 @@
 
 #include "qgsnumericformat.h"
 #include "qgsxmlutils.h"
+#include "qgsreadwritecontext.h"
 
 #include <QLocale>
 
@@ -49,3 +50,13 @@ void QgsNumericFormat::writeXml( QDomElement &element, QDomDocument &document, c
   element.setAttribute( QStringLiteral( "id" ), id() );
 }
 
+bool QgsNumericFormat::operator==( const QgsNumericFormat &other ) const
+{
+  return id() == other.id() && configuration( QgsReadWriteContext() ) == other.configuration( QgsReadWriteContext() );
+}
+
+bool QgsNumericFormat::operator!=( const QgsNumericFormat &other ) const
+{
+  return !operator==( other );
+}
+

src/core/numericformats/qgsnumericformat.h

@@ -300,6 +300,9 @@ class CORE_EXPORT QgsNumericFormat
      */
     void writeXml( QDomElement &element, QDomDocument &document, const QgsReadWriteContext &context ) const;
 
+    bool operator==( const QgsNumericFormat &other ) const;
+    bool operator!=( const QgsNumericFormat &other ) const;
+
 };
 
 #endif // QGSNUMERICFORMAT_H

tests/src/python/test_qgsnumericformat.py

@@ -70,6 +70,16 @@ class TestQgsNumericFormat(unittest.TestCase):
         f3 = QgsNumericFormatRegistry().createFromXml(elem, QgsReadWriteContext())
         self.assertIsInstance(f3, QgsFallbackNumericFormat)
 
+    def testEquality(self):
+        f = QgsBasicNumericFormat()
+        f2 = QgsBasicNumericFormat()
+        self.assertEqual(f, f2)
+        f2.setShowPlusSign(True)
+        self.assertNotEqual(f, f2)
+        f.setShowPlusSign(True)
+        self.assertEqual(f, f2)
+        self.assertNotEqual(f, QgsCurrencyNumericFormat())
+
     def testBasicFormat(self):
         """ test basic formatter """
         f = QgsBasicNumericFormat()