test: add secp256k1 test

Tests/AptosKitTests/SECP256K1Tests.swift

@@ -0,0 +1,76 @@
+//
+//  SECP256K1Tests.swift
+//  AptosKit
+//
+//  Copyright (c) 2024 OpenDive
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import XCTest
+@testable import AptosKit
+
+final class SECP256K1Tests: XCTestCase {
+    func testThatSigningAndVerifyingWorksAsIntended() throws {
+        guard let input: Data = "test_message".data(using: .utf8) else {
+            XCTFail("Invalid Input")
+            return
+        }
+
+        let privateKey = try SECP256K1PrivateKey()
+        let publicKey = try privateKey.publicKey()
+
+        let signature = try privateKey.sign(data: input)
+        XCTAssertTrue(try publicKey.verify(data: input, signature: signature))
+    }
+
+    func testThatPrivateKeySerializationWorksAsIntended() throws {
+        let privateKey = try SECP256K1PrivateKey()
+        let ser = Serializer()
+
+        try privateKey.serialize(ser)
+        let serPrivateKey = try SECP256K1PrivateKey.deserialize(from: Deserializer(data: ser.output()))
+        XCTAssertEqual(privateKey, serPrivateKey)
+    }
+
+    func testThatPublicKeySerializationWorksAsIntended() throws {
+        let privateKey = try SECP256K1PrivateKey()
+        let publicKey = try privateKey.publicKey()
+
+        let ser = Serializer()
+        try publicKey.serialize(ser)
+        let serPublicKey = try SECP256K1PublicKey.deserialize(from: Deserializer(data: ser.output()))
+        XCTAssertEqual(publicKey, serPublicKey)
+    }
+
+    func testThatSignatureSerializationWorksAsIntended() throws {
+        let privateKey = try SECP256K1PrivateKey()
+        guard let input: Data = "another_message".data(using: .utf8) else {
+            XCTFail("Invalid Input")
+            return
+        }
+        let signature = try privateKey.sign(data: input)
+
+        let ser = Serializer()
+        try signature.serialize(ser)
+        let serSignature = try Signature.deserialize(from: Deserializer(data: ser.output()))
+
+        XCTAssertEqual(signature, serSignature)
+    }
+}