tests: add unit tests for ResumeData and Discord event classes

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

@@ -0,0 +1,30 @@
+namespace StevesBot.Worker.Tests.Unit;
+
+public class MessageCreateDiscordEventTests
+{
+  [Fact]
+  public void Constructor_WhenCalled_ItShouldReturnAnInstance()
+  {
+    var result = new MessageCreateDiscordEvent();
+
+    result.OpCode.Should().Be(0);
+    result.Type.Should().BeNull();
+    result.Sequence.Should().BeNull();
+    result.Data.Should().BeEquivalentTo(new DiscordMessage());
+  }
+
+  [Theory]
+  [InlineData(0, 0, true)]
+  [InlineData(1, 0, false)]
+  public void IsMessageType_WhenCalled_ItShouldReturnCorrectResult(int messageType, int givenType, bool expectedResult)
+  {
+    var e = new MessageCreateDiscordEvent()
+    {
+      Data = new() { Type = messageType }
+    };
+
+    var result = e.IsMessageType(givenType);
+
+    result.Should().Be(expectedResult);
+  }
+}