test: (WIP) add mocks and tests for secret key

packages/native_crypto/pubspec.yaml

@@ -2,7 +2,7 @@ name: native_crypto
 description: Fast and secure cryptography for Flutter.
 version: 0.1.1
 
-# publish_to: 'none'
+publish_to: 'none'
 
 environment:
   sdk: ">=2.17.0 <3.0.0"
@@ -34,6 +34,9 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
 
+  mockito: ^5.2.0
+  plugin_platform_interface: ^2.1.2
+
   wyatt_analysis:
     git:
       url: https://git.wyatt-studio.fr/Wyatt-FOSS/wyatt-packages

packages/native_crypto/test/mocks/mock_native_crypto_platform.dart

@@ -0,0 +1,192 @@
+// Author: Hugo Pointcheval
+// Email: git@pcl.ovh
+// -----
+// File: mock_native_crypto_platform.dart
+// Created Date: 25/05/2022 23:34:34
+// Last Modified: 26/05/2022 11:40:24
+// -----
+// Copyright (c) 2022
+
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:native_crypto_platform_interface/native_crypto_platform_interface.dart';
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+
+class MockNativeCryptoPlatform extends Fake
+    with MockPlatformInterfaceMixin
+    implements NativeCryptoPlatform {
+  Uint8List? data;
+  List<Uint8List>? dataAsList;
+  Uint8List? key;
+  String? algorithm;
+  int? bitsCount;
+  String? password;
+  String? salt;
+  int? keyBytesCount;
+  int? iterations;
+
+  Uint8List? Function()? response;
+  List<Uint8List>? Function()? responseAsList;
+
+  // ignore: use_setters_to_change_properties
+  void setResponse(Uint8List? Function()? response) {
+    this.response = response;
+  }
+
+  // ignore: use_setters_to_change_properties
+  void setResponseAsList(List<Uint8List>? Function()? responseAsList) {
+    this.responseAsList = responseAsList;
+  }
+
+  void setDecryptExpectations({
+    required Uint8List data,
+    required Uint8List key,
+    required String algorithm,
+  }) {
+    this.data = data;
+    this.key = key;
+    this.algorithm = algorithm;
+  }
+
+  @override
+  Future<Uint8List?> decrypt(
+    Uint8List data,
+    Uint8List key,
+    String algorithm,
+  ) async {
+    expect(data, this.data);
+    expect(key, this.key);
+    expect(algorithm, this.algorithm);
+    return response?.call();
+  }
+
+  void setDecryptAsListExpectations({
+    required List<Uint8List> data,
+    required Uint8List key,
+    required String algorithm,
+  }) {
+    dataAsList = data;
+    this.key = key;
+    this.algorithm = algorithm;
+  }
+
+  @override
+  Future<Uint8List?> decryptAsList(
+    List<Uint8List> data,
+    Uint8List key,
+    String algorithm,
+  ) async {
+    expect(data, dataAsList);
+    expect(key, this.key);
+    expect(algorithm, this.algorithm);
+
+    return response?.call();
+  }
+
+  void setDigestExpectations({
+    required Uint8List data,
+    required String algorithm,
+  }) {
+    this.data = data;
+    this.algorithm = algorithm;
+  }
+
+  @override
+  Future<Uint8List?> digest(Uint8List data, String algorithm) async {
+    expect(data, this.data);
+    expect(algorithm, this.algorithm);
+
+    return response?.call();
+  }
+
+  void setEncryptExpectations({
+    required Uint8List data,
+    required Uint8List key,
+    required String algorithm,
+  }) {
+    this.data = data;
+    this.key = key;
+    this.algorithm = algorithm;
+  }
+
+  @override
+  Future<Uint8List?> encrypt(
+    Uint8List data,
+    Uint8List key,
+    String algorithm,
+  ) async {
+    expect(data, this.data);
+    expect(key, this.key);
+    expect(algorithm, this.algorithm);
+
+    return response?.call();
+  }
+
+  void setEncryptAsListExpectations({
+    required Uint8List data,
+    required Uint8List key,
+    required String algorithm,
+  }) =>
+      setEncryptExpectations(
+        data: data,
+        key: key,
+        algorithm: algorithm,
+      );
+
+  @override
+  Future<List<Uint8List>?> encryptAsList(
+    Uint8List data,
+    Uint8List key,
+    String algorithm,
+  ) async {
+    expect(data, this.data);
+    expect(key, this.key);
+    expect(algorithm, this.algorithm);
+
+    return responseAsList?.call();
+  }
+
+  // ignore: use_setters_to_change_properties
+  void setGenerateKeyExpectations({required int bitsCount}) {
+    this.bitsCount = bitsCount;
+  }
+
+  @override
+  Future<Uint8List?> generateSecretKey(int bitsCount) async {
+    expect(bitsCount, this.bitsCount);
+
+    return response?.call();
+  }
+
+  void setPbkdf2Expectations({
+    required String password,
+    required String salt,
+    required int keyBytesCount,
+    required int iterations,
+    required String algorithm,
+  }) {
+    this.password = password;
+    this.salt = salt;
+    this.iterations = iterations;
+    this.keyBytesCount = keyBytesCount;
+    this.algorithm = algorithm;
+  }
+
+  @override
+  Future<Uint8List?> pbkdf2(
+    String password,
+    String salt,
+    int keyBytesCount,
+    int iterations,
+    String algorithm,
+  ) async {
+    expect(password, this.password);
+    expect(salt, this.salt);
+    expect(keyBytesCount, this.keyBytesCount);
+    expect(iterations, this.iterations);
+    expect(algorithm, this.algorithm);
+
+    return response?.call();
+  }
+}

packages/native_crypto/test/src/secret_key_test.dart

@@ -0,0 +1,125 @@
+// Author: Hugo Pointcheval
+// Email: git@pcl.ovh
+// -----
+// File: secret_key_test.dart
+// Created Date: 26/05/2022 10:52:41
+// Last Modified: 26/05/2022 12:07:33
+// -----
+// Copyright (c) 2022
+
+import 'dart:typed_data';
+
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:native_crypto/src/keys/secret_key.dart';
+import 'package:native_crypto_platform_interface/native_crypto_platform_interface.dart';
+
+import '../mocks/mock_native_crypto_platform.dart';
+
+void main() {
+  final MockNativeCryptoPlatform mock = MockNativeCryptoPlatform();
+  NativeCryptoPlatform.instance = mock;
+
+  group('fromSecureRandom', () {
+    test('handles returning random bytes', () async {
+      mock
+        ..setGenerateKeyExpectations(bitsCount: 5)
+        ..setResponse(() => Uint8List.fromList([1, 2, 3, 4, 5]));
+
+      final SecretKey secretKey = await SecretKey.fromSecureRandom(5);
+
+      expect(
+        secretKey.bytes,
+        Uint8List.fromList([1, 2, 3, 4, 5]),
+      );
+    });
+
+    test('handles returning empty list', () async {
+      mock
+        ..setGenerateKeyExpectations(bitsCount: 5)
+        ..setResponse(() => Uint8List(0));
+
+      await expectLater(
+        () => SecretKey.fromSecureRandom(5),
+        throwsA(
+          isA<KeyException>().having(
+            (e) => e.code,
+            'code',
+            'platform_returned_null',
+          ),
+        ),
+      );
+    });
+
+    test('handles returning null', () async {
+      mock
+        ..setGenerateKeyExpectations(bitsCount: 5)
+        ..setResponse(() => null);
+
+      await expectLater(
+        () => SecretKey.fromSecureRandom(5),
+        throwsA(
+          isA<KeyException>().having(
+            (e) => e.code,
+            'code',
+            'platform_returned_null',
+          ),
+        ),
+      );
+    });
+
+    test('handles throwing PlatformException', () async {
+      mock
+        ..setGenerateKeyExpectations(bitsCount: 5)
+        ..setResponse(
+          () => throw PlatformException(
+            code: 'native_crypto',
+            message: 'dummy error',
+          ),
+        );
+
+      await expectLater(
+        () => SecretKey.fromSecureRandom(5),
+        throwsA(
+          isA<KeyException>()
+              .having(
+                (e) => e.message,
+                'message',
+                'PlatformException(native_crypto, dummy error, null, null)',
+              )
+              .having(
+                (e) => e.code,
+                'code',
+                'failed_to_generate_secret_key',
+              ),
+        ),
+      );
+    });
+  });
+  
+  group('Constructors', () {
+    test('handles Uint8List', () {
+      final SecretKey key = SecretKey(Uint8List.fromList([1, 2, 3, 4, 5]));
+
+      expect(key.bytes, Uint8List.fromList([1, 2, 3, 4, 5]));
+    });
+
+    test('handles base16', () {
+      final SecretKey key = SecretKey.fromBase16('0102030405');
+
+      expect(key.bytes, Uint8List.fromList([1, 2, 3, 4, 5]));
+    });
+
+    test('handles base64', () {
+      final SecretKey key = SecretKey.fromBase64('AQIDBAU=');
+
+      expect(key.bytes, Uint8List.fromList([1, 2, 3, 4, 5]));
+    });
+
+    test('handles utf8', () {
+      final SecretKey key = SecretKey.fromUtf8('ABCDE');
+
+      expect(key.bytes, Uint8List.fromList([65, 66, 67, 68, 69]));
+    });
+  });
+}