From 46781ad9082ccea3aab7950095238003269cbaad Mon Sep 17 00:00:00 2001
From: Dariusz Komosinski <darek.komosinski@gmail.com>
Date: Sun, 26 Jan 2020 20:58:41 +0100
Subject: [PATCH] Add basic benchmarks for Is and Class selectors.

---
 .../Styling/SelectorBenchmark.cs              | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 tests/Avalonia.Benchmarks/Styling/SelectorBenchmark.cs

diff --git a/tests/Avalonia.Benchmarks/Styling/SelectorBenchmark.cs b/tests/Avalonia.Benchmarks/Styling/SelectorBenchmark.cs
new file mode 100644
index 0000000000..0ac96c1103
--- /dev/null
+++ b/tests/Avalonia.Benchmarks/Styling/SelectorBenchmark.cs
@@ -0,0 +1,52 @@
+using Avalonia.Controls;
+using Avalonia.Styling;
+using BenchmarkDotNet.Attributes;
+
+namespace Avalonia.Benchmarks.Styling
+{
+    [MemoryDiagnoser]
+    public class SelectorBenchmark
+    {
+        private readonly Control _notMatchingControl;
+        private readonly Calendar _matchingControl;
+        private readonly Selector _isCalendarSelector;
+        private readonly Selector _classSelector;
+
+        public SelectorBenchmark()
+        {
+            _notMatchingControl = new Control();
+            _matchingControl = new Calendar();
+
+            const string className = "selector-class";
+
+            _matchingControl.Classes.Add(className);
+
+            _isCalendarSelector = Selectors.Is<Calendar>(null);
+            _classSelector = Selectors.Class(null, className);
+        }
+
+        [Benchmark]
+        public SelectorMatch IsSelector_NoMatch()
+        {
+            return _isCalendarSelector.Match(_notMatchingControl);
+        }
+
+        [Benchmark]
+        public SelectorMatch IsSelector_Match()
+        {
+            return _isCalendarSelector.Match(_matchingControl);
+        }
+
+        [Benchmark]
+        public SelectorMatch ClassSelector_NoMatch()
+        {
+            return _classSelector.Match(_notMatchingControl);
+        }
+
+        [Benchmark]
+        public SelectorMatch ClassSelector_Match()
+        {
+            return _classSelector.Match(_matchingControl);
+        }
+    }
+}