tests: add tests

src/StevesBot.Worker.Tests/Unit/HeartbeatDiscordEventTests.cs

@@ -0,0 +1,17 @@
+namespace StevesBot.Worker.Tests.Unit;
+
+public class HeartbeatDiscordEventTests
+{
+  [Theory]
+  [InlineData(null)]
+  [InlineData(1)]
+  public void Constructor_WhenCalled_ItShouldInitializeProperties(int? sequence)
+  {
+    var heartbeatEvent = new HeartbeatDiscordEvent(sequence);
+
+    heartbeatEvent.OpCode.Should().Be(1);
+    heartbeatEvent.Sequence.Should().Be(sequence);
+    heartbeatEvent.Type.Should().BeNull();
+    heartbeatEvent.Data.Should().BeNull();
+  }
+}

src/StevesBot.Worker.Tests/Unit/WebSocketTests.cs

@@ -0,0 +1,15 @@
+using WebSocket = StevesBot.Worker.WebSockets.WebSocket;
+
+namespace StevesBot.Worker.Tests.Unit;
+
+public class WebSocketTests
+{
+  [Fact]
+  public void State_WhenCalled_ItShouldReturnWebSocketState()
+  {
+    using var webSocket = new WebSocket();
+    var state = webSocket.State;
+
+    state.Should().Be(WebSocketState.None);
+  }
+}