Model tests

Author: iamc1oud

lib/features/number_trivia/data/models/number_trivia_model.dart

@@ -0,0 +1,16 @@
+import 'package:flutter/foundation.dart';
+import 'package:tdd_number_trivia/features/number_trivia/domain/entities/number_trivia.dart';
+
+class NumberTriviaModel extends NumberTrivia {
+  NumberTriviaModel({@required String text, @required int number})
+      : super(text: text, number: number);
+
+  factory NumberTriviaModel.fromJson(Map<String, dynamic> json) {
+    return NumberTriviaModel(
+        text: json['text'], number: (json['number'] as num).toInt());
+  }
+
+  Map<String, dynamic> toJson() {
+    return {'text': text, 'number': number};
+  }
+}

test/features/number_trivia/data/models/number_trivia_model_test.dart

@@ -0,0 +1,43 @@
+import 'dart:convert';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tdd_number_trivia/features/number_trivia/data/models/number_trivia_model.dart';
+import 'package:tdd_number_trivia/features/number_trivia/domain/entities/number_trivia.dart';
+
+import '../../../../fixtures/fixture_reader.dart';
+
+void main() {
+  final tNumberTriviaModel = NumberTriviaModel(number: 1, text: "Hello world");
+  final tNumberTriviaModelDouble = NumberTriviaModel(number: 1, text: "Hello");
+  test("should be a subclass of NumberTrivia entitiy", () async {
+    expect(tNumberTriviaModel, isA<NumberTrivia>());
+  });
+
+  // Group
+  group("fromJson", () {
+    test("should return valid model when json number is integer", () async {
+      // arrange
+      final Map<String, dynamic> jsonMap = json.decode(fixture("trivia.json"));
+      final result = NumberTriviaModel.fromJson(jsonMap);
+      // act
+      expect(result, tNumberTriviaModel);
+    });
+
+    test("should return valid model when json number is double", () async {
+      // arrange
+      final Map<String, dynamic> jsonMap =
+          json.decode(fixture("trivia_double.json"));
+      final result = NumberTriviaModel.fromJson(jsonMap);
+      // act
+      expect(result, tNumberTriviaModelDouble);
+    });
+  });
+
+  group('toJson', () {
+    test("should return a valid number trivia json map", () async {
+      final result = tNumberTriviaModel.toJson();
+      final expectedMap = {"text": "Hello world", "number": 1};
+      expect(expectedMap, result);
+    });
+  });
+}

test/fixtures/fixture_reader.dart

@@ -0,0 +1,3 @@
+import 'dart:io';
+
+String fixture(String name) => File('test/fixtures/$name').readAsStringSync();

test/fixtures/trivia.json

@@ -0,0 +1,7 @@
+{
+    "text": "Hello world",
+    "number": 1,
+    "found": true,
+    "type": "trivia"
+}
+

test/fixtures/trivia_double.json

@@ -0,0 +1,6 @@
+{
+    "text": "Hello",
+    "number": 1.0,
+    "found": true,
+    "type": "trivia"
+}