FLUTTER / DART APP - widget_test.dart - appears to now have a problem - flutter

Question

I'm new to coding of any sort and am creating an app that was working fine. From time to time I have been making a copy of the "main.dart" code in case I get any problems and need to copy it back for any reason. Suddenly I seem to have a lot of errors related to the widget_test.dart file - can this be restored from anywhere or recreated from the code in main.dart as I never took a copy of this, just the main.dart code.
UPDATE ** Code added :
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
const appTitle = 'Diabetic insulin dosage';
return MaterialApp(
debugShowCheckedModeBanner: false,
title: appTitle,
home: Scaffold(
appBar: AppBar(
title: const Text(appTitle),
backgroundColor: Colors.blue,
foregroundColor: Colors.black,
),
body: const AddTwoNumbers(),
bottomNavigationBar: BottomNavigationBar(
items: const [
BottomNavigationBarItem(label: 'home', icon: Icon(Icons.home)),
BottomNavigationBarItem(
label: 'Defaults',
icon: Icon(Icons.settings),
)
],
),
backgroundColor: Colors.white,
),
);
}
}
class AddTwoNumbers extends StatefulWidget {
const AddTwoNumbers({super.key});
#override
// ignore: library_private_types_in_public_api
_AddTwoNumbersState createState() => _AddTwoNumbersState();
}
class _AddTwoNumbersState extends State<AddTwoNumbers> {
Color _fillColor = Colors.white;
TextEditingController numR1C1controller =
TextEditingController(); //Changed name of the texteditingcontroller as Row as R and Column as C
TextEditingController numR1C2controller = TextEditingController();
TextEditingController numR1C3controller = TextEditingController();
TextEditingController numR2C1controller = TextEditingController();
TextEditingController numR2C2controller = TextEditingController();
TextEditingController numR2C3controller = TextEditingController();
TextEditingController numR3C1controller = TextEditingController();
TextEditingController numR3C2controller = TextEditingController();
TextEditingController numR3C3controller = TextEditingController();
TextEditingController numR4C1controller = TextEditingController();
TextEditingController numR4C2controller = TextEditingController();
TextEditingController numR4C3controller = TextEditingController();
TextEditingController numR5C1controller = TextEditingController();
TextEditingController numR5C2controller = TextEditingController();
TextEditingController numR5C3controller = TextEditingController();
TextEditingController numR6C1controller = TextEditingController();
TextEditingController numR6C2controller = TextEditingController();
TextEditingController numR6C3controller = TextEditingController();
String result = "0";
String result2 = "0";
String result3 = "0";
String result4 = "0";
String result5 = "0";
String result6 = "0";
#override
void dispose() {
super.dispose();
numR1C1controller.dispose();
numR1C2controller.dispose();
numR1C3controller.dispose();
numR2C1controller.dispose();
numR2C2controller.dispose();
numR2C3controller.dispose();
numR3C1controller.dispose();
numR3C2controller.dispose();
numR3C3controller.dispose();
numR4C1controller.dispose();
numR4C2controller.dispose();
numR4C3controller.dispose();
numR5C1controller.dispose();
numR5C2controller.dispose();
numR5C3controller.dispose();
numR6C1controller.dispose();
numR6C2controller.dispose();
numR6C3controller.dispose();
}
// MAKE LIST OF MAP TO KEEP TRACK OF EACH BUTTONS
List<Map> buttons = [
{"name": "BreakFast", "active": false, "value": 1.0},
{"name": "Lunch", "active": false, "value": 0.55},
{"name": "Tea", "active": false, "value": 0.55},
];
// YOU CAN SET VARIABLE TO CURRENT MEAL NAME AND CAN CHECK WHETHER IT'S (breakFast) OR NOT
String? currentMealType;
// TOGGLE BUTTON FUNCTION
toggleButtons(Map obj) {
for (var i in buttons) {
if (i['name'] == obj['name']) {
i['active'] = !i['active'];
numR2C2controller.text = obj['value'].toString();
_calculateR2();
} else {
i['active'] = false;
}
}
setState(() {});
}
_calculateR1() {
if (numR1C1controller.text.isNotEmpty &&
numR1C2controller.text.isNotEmpty) {
double sum = double.parse(numR1C1controller.text) -
double.parse(numR1C2controller.text);
numR4C2controller.text = numR1C2controller.text;
numR2C1controller.text = numR1C1controller.text; // <-- add this
WidgetsBinding.instance.addPostFrameCallback((_) {
_calculateR3();
_calculateR2();
});
result = sum.toStringAsFixed(1);
}
if (numR1C2controller.text.isNotEmpty) {
setState(() {
_fillColor = double.parse(numR1C2controller.text) < 5
? Colors.red
: double.parse(numR1C2controller.text) > 9.1
? Colors.orange
: Colors.green;
});
} else {
setState(() {
_fillColor = Colors.white;
});
}
}
_calculateR2() {
if (numR2C1controller.text.isNotEmpty &&
numR2C2controller.text.isNotEmpty) {
setState(() {
double sum = double.parse(numR2C2controller.text) *
double.parse(numR2C1controller.text);
numR2C3controller.text = sum.toStringAsFixed(1);
numR3C1controller.text = numR2C3controller.text;
WidgetsBinding.instance.addPostFrameCallback((_) {
_calculateR3();
});
result2 = sum.toStringAsFixed(1);
});
}
}
_calculateR3() {
if (numR3C1controller.text.isNotEmpty &&
numR3C2controller.text.isNotEmpty) {
setState(() {
double sum = double.parse(numR3C1controller.text) /
double.parse(numR3C2controller.text);
numR3C3controller.text = sum.toStringAsFixed(1);
numR6C1controller.text = numR3C3controller.text;
WidgetsBinding.instance.addPostFrameCallback((_) {
_calculateR3();
_calculateR4();
_calculateR6();
});
result3 = sum.toStringAsFixed(1);
});
}
}
_calculateR4() {
if (numR4C1controller.text.isNotEmpty &&
numR4C2controller.text.isNotEmpty) {
setState(() {
double sum = double.parse(numR4C1controller.text) -
double.parse(numR4C2controller.text);
numR4C3controller.text = sum.toStringAsFixed(1);
numR5C1controller.text = numR4C3controller.text;
WidgetsBinding.instance.addPostFrameCallback((_) {
_calculateR5();
});
result4 = sum.toStringAsFixed(1);
});
}
}
_calculateR5() {
if (numR5C1controller.text.isNotEmpty &&
numR5C2controller.text.isNotEmpty) {
setState(() {
double sum = double.parse(numR5C1controller.text) /
double.parse(numR5C2controller.text);
numR5C3controller.text = sum.toStringAsFixed(1);
numR6C2controller.text = numR5C3controller.text;
result5 = sum.toStringAsFixed(1);
});
}
}
_calculateR6() {
if (numR6C1controller.text.isNotEmpty &&
numR6C2controller.text.isNotEmpty) {
setState(() {
double sum = double.parse(numR6C1controller.text) -
double.parse(numR6C2controller.text);
numR6C3controller.text = sum.toStringAsFixed(1);
result6 = sum.toStringAsFixed(1);
});
}
}
#override
Widget build(BuildContext context) {
return Container(
padding: const EdgeInsets.all(10.0),
child: Column(
children: [
const Padding(
padding: EdgeInsets.all(6.0),
child: Text('Please pick a meal'),
),
// HERE IS THE VIEW FOR BUTTONS
//******************************
Row(
children: buttons
.map(
(btn) => Expanded(
child: GestureDetector(
onTap: () => toggleButtons(btn),
child: Container(
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.only(bottom: 10, right: 10),
decoration: BoxDecoration(
color: btn['active'] ? Colors.blue : Colors.white,
border: Border.all(color: Colors.grey[300]!)),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text(btn['name'],
style: TextStyle(
color: btn['active']
? Colors.white
: Colors.black)),
Text(btn['value'].toString(),
style: TextStyle(
color: btn['active']
? Colors.white
: Colors.black))
],
),
),
),
),
)
.toList(),
),
const Padding(
padding: EdgeInsets.all(6.0),
child: Text('Input Data'),
),
//******************************
Row(
children: <Widget>[
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 14.0),
controller: numR1C1controller,
onChanged: (value) => _calculateR1(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,1}'))
],
decoration: InputDecoration(
contentPadding: const EdgeInsets.all(20),
border: const OutlineInputBorder(),
labelText: 'Carbs in Meal',
isDense: true,
hintText: 'Enter 1st Number',
fillColor: _fillColor,
filled: false),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 14.0),
onChanged: (value) => _calculateR1(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR1C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,1}'))
],
decoration: InputDecoration(
contentPadding: const EdgeInsets.all(20),
border: const OutlineInputBorder(),
filled: true,
labelText: 'Current B/G Level',
isDense: true,
hintText: 'Enter 2nd Number',
fillColor: _fillColor),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 14.0),
onChanged: (value) => _calculateR1(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR1C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(20),
border: OutlineInputBorder(),
labelText: 'Excercise Factor',
isDense: true,
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
const SizedBox(
height: 8,
),
const Padding(
padding: EdgeInsets.all(6.0),
child: Text('Calculations'),
),
Row(
children: [
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0, height: 1.0),
onChanged: (value) => _calculateR2(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR2C1controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'T Carbs in meal',
hintText: 'Enter 3rd Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR2(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR2C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'T Meal Ratio',
hintText: 'Enter 4th Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR3(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR2C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'Result 2',
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
const SizedBox(
height: 8,
),
Row(
children: [
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR3(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR3C1controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'T Result 2',
hintText: 'Enter Fifth Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR3(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR3C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'Correction Factor',
hintText: 'Enter Sixth Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR3(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR3C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'Result 3',
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
const SizedBox(
height: 8,
),
Row(
children: [
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR4(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR4C1controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'T Target Level',
hintText: 'Enter Seventh Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR4(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR4C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'T Current B/G Level',
// isDense: true,
hintText: 'Enter Eighth Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR4(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR4C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'Result 4',
// isDense: true,
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
const SizedBox(
height: 8,
),
Row(
children: [
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR5(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR5C1controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'T Result Difference',
hintText: 'Enter 9th Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR5(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR5C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'Correction Factor',
hintText: 'Enter 10th Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR5(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR5C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'Result 5',
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
const SizedBox(
height: 8,
),
Row(
children: [
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR6(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR6C1controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'T Result Actual Units',
hintText: 'Enter 11th Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR6(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR6C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'Result Difference',
// isDense: true,
hintText: 'Enter 12th Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR6(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR6C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(\d+)?\.?\d{0,2}'))
],
decoration: const InputDecoration(
contentPadding: EdgeInsets.all(2),
border: OutlineInputBorder(),
labelText: 'Result 6',
// isDense: true,
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
],
),
);
}
}

Answer 1

when you create new flutter project, you can see sample code that have FloatingActionButton with Icons.add and when you press it, increasing counter variable.
this test is write for that. so tester want to find FloatingActionButton by it's icon. it have a problem because tester can not find FloatingActionButton.
if you want to know more about unit-testing I suggest watch this tutorial:
https://www.youtube.com/watch?v=4d6hEaUVvuU