Example for Unit Test (#52)

unit_testing/lib/screens/home_screen.dart

@@ -0,0 +1,39 @@
+import 'package:flutter/material.dart';
+import 'package:unit_testing/components/place_info_card.dart';
+import 'package:unit_testing/model/location.dart';
+
+import '../helpers.dart';
+
+class HomeScreen extends StatefulWidget {
+  @override
+  _HomeScreenState createState() => _HomeScreenState();
+}
+
+class _HomeScreenState extends State<HomeScreen> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Unit Test'),
+        centerTitle: true,
+      ),
+      body: FutureBuilder(
+        future: TouristPlaces.getData(), // this functions calls API.
+        builder: (BuildContext context, AsyncSnapshot snapshot) {
+          if (snapshot.hasData) {
+            final List<Location> data = snapshot.data;
+            return ListView.builder(
+              physics: BouncingScrollPhysics(),
+              itemCount: data.length,
+              itemBuilder: (context, index) => PlaceInfo(
+                data: data[index],
+              ),
+            );
+          } else {
+            return Center(child: CircularProgressIndicator());
+          }
+        },
+      ),
+    );
+  }
+}

unit_testing/lib/screens/sign_in_screen.dart

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+import 'package:flutter/material.dart';
+import 'package:unit_testing/helpers.dart';
+
+class SignInScreen extends StatefulWidget {
+  @override
+  _SignInScreenState createState() => _SignInScreenState();
+}
+
+class _SignInScreenState extends State<SignInScreen> {
+  final _formKey = GlobalKey<FormState>();
+
+  @override
+  Widget build(BuildContext context) {
+    return Material(
+      child: Padding(
+        padding: const EdgeInsets.all(40.0),
+        child: Form(
+          key: _formKey,
+          child: Column(
+            children: [
+              Icon(
+                Icons.account_circle,
+                size: 200,
+              ),
+              SizedBox(
+                height: 50,
+              ),
+              TextFormField(
+                validator: (value) => FormValidator.validateEmail(value),
+                decoration: InputDecoration(
+                  hintText: "Email",
+                ),
+              ),
+              SizedBox(
+                height: 50,
+              ),
+              TextFormField(
+                validator: (value) => FormValidator.validatePassword(value),
+                decoration: InputDecoration(
+                  hintText: "Password",
+                ),
+              ),
+              SizedBox(
+                height: 50,
+              ),
+              RaisedButton(
+                onPressed: () {
+                  if (_formKey.currentState.validate()) {
+                    Navigator.of(context).pushReplacementNamed('/homeScreen');
+                  }
+                },
+                child: Text('Sign In'),
+              )
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}