test: Add tests for flag counters (#76)

tests/Application.Tests/Players/Accounts/FlagCounterTests.cs

@@ -0,0 +1,64 @@
+namespace CTF.Application.Tests.Players.Accounts;
+
+public class FlagCounterTests
+{
+    [Test]
+    public void AddBroughtFlags_WhenCalledTwice_ShouldBeIncreasedTo2()
+    {
+        // Arrange
+        var player = new PlayerInfo();
+        int expected = 2;
+
+        // Act
+        player.AddBroughtFlags();
+        player.AddBroughtFlags();
+
+        // Assert
+        player.BroughtFlags.Should().Be(expected);
+    }
+
+    [Test]
+    public void AddCapturedFlags_WhenCalledTwice_ShouldBeIncreasedTo2()
+    {
+        // Arrange
+        var player = new PlayerInfo();
+        int expected = 2;
+
+        // Act
+        player.AddCapturedFlags();
+        player.AddCapturedFlags();
+
+        // Assert
+        player.CapturedFlags.Should().Be(expected);
+    }
+
+    [Test]
+    public void AddDroppedFlags_WhenCalledTwice_ShouldBeIncreasedTo2()
+    {
+        // Arrange
+        var player = new PlayerInfo();
+        int expected = 2;
+
+        // Act
+        player.AddDroppedFlags();
+        player.AddDroppedFlags();
+
+        // Assert
+        player.DroppedFlags.Should().Be(expected);
+    }
+
+    [Test]
+    public void AddReturnedFlags_WhenCalledTwice_ShouldBeIncreasedTo2()
+    {
+        // Arrange
+        var player = new PlayerInfo();
+        int expected = 2;
+
+        // Act
+        player.AddReturnedFlags();
+        player.AddReturnedFlags();
+
+        // Assert
+        player.ReturnedFlags.Should().Be(expected);
+    }
+}