Test Matchable with RawRepresentable default impl (#14)

This PR adds tests for default implementation for `Matchable` and it's
also `RawRepresentable`.

Author: FlickerSoul

Tests/BinaryParseKitTests/TestMatchable.swift

@@ -0,0 +1,46 @@
+//
+//  TestMatchable.swift
+//  BinaryParseKit
+//
+//  Created by Larry Zeng on 11/22/25.
+//
+
+import BinaryParseKit
+import Testing
+
+extension String: Matchable {
+    public func bytesToMatch() -> [UInt8] {
+        utf8.map(\.self)
+    }
+}
+
+@Suite
+struct MatchableTests {
+    enum RawRepresentableMatch: UInt8, Matchable, Codable {
+        case success = 0x00
+        case failure = 0x01
+    }
+
+    @Test(arguments: [
+        RawRepresentableMatch.success,
+        .failure,
+    ])
+    func `byte generated from RawRepresentable`(_ input: RawRepresentableMatch) {
+        #expect(input.bytesToMatch() == [input.rawValue])
+    }
+
+    enum CustomRawRepresentable: String, Matchable, Codable {
+        case first = "one"
+        case second = "two"
+        case third = "three"
+    }
+
+    @Test(arguments: [
+        CustomRawRepresentable.first,
+        .second,
+        .third,
+    ])
+    func `bytes generated from CustomRawRepresentable`(_ input: CustomRawRepresentable) {
+        #expect(input.bytesToMatch() == Array(input.rawValue.utf8))
+    }
+}