Merge branch 'feature/pretty-print-formulas'

TODO.md

@@ -47,5 +47,11 @@
   - [R] There is one row for the ouput variable, similar to the row for the input variable
   - [R] d4rtCode is a text area with dart syntax highligthing
   - [R] At the botton, a button allows to test the edited Formula, launching a FormulaScreen
+- [X] Create SetUtils.prettyPrint(): receives a dynamic Set, Array, string or number. Convert to a dart representation of than value (a set/array literal), json-like, but for dart language. Do it recursivelly on local functions to that method:
+  - _prettyPrintString(String s, int indent): Only for simple strings
+  - _prettyPrintNumber(Number n, int indent)
+  - _prettyPrintSet(Set s, int indent)
+  - _prettyPrintArray(dynamic[] a, int indent)
+  - _prettyPrintRawString(String s, int indent): Use _prettyPrintRawString when the string contains newlines, $, backlash...
 - [ ] When _FormulaScreenState._evaluateFormula() detect an error, instead of show an SnackBar, show a ExpansionTile with "⚠️ There were an error. Show details..." with the details of the exception. The ExpansionTile will be invisible if there is no error.
 - [ ] Investigate https://pub.dev/packages/quantity

bin/pruebas_d4rt.dart

@@ -1,17 +0,0 @@
-import 'package:d4rt/d4rt.dart';
-
-void main() {
-  final code = '''
-    int fib(int n) {
-      if (n <= 1) return n;
-      return fib(n - 1) + fib(n - 2);
-    }
-    main() {
-      return fib(6);
-    }
-  ''';
-
-  final interpreter = D4rt();
-  final result = interpreter.execute(source: code);
-  print('Result: $result'); // Result: 8
-}

lib/ai/formula_list.dart

@@ -53,16 +53,15 @@ class _FormulaListState extends State<FormulaList> {
     }).toList();
   }
 
+  String _formulaAndDependenciesToStringLiteral(Formula formula) {
+    // Get the formula and its dependencies
+    final dependencies = widget.corpus.withDependencies(formula);
+    return SetUtils.prettyPrint(dependencies.map((f) => f.toMap()).toList());
+  }
+
   void _shareFormula(Formula formula) async {
     try {
-      // Get the formula and its dependencies
-      final dependencies = widget.corpus.withDependencies(formula);
-
-      // Convert each dependency to its string literal representation
-      final literals = dependencies.map((element) => element.toStringLiteral()).toList();
-
-      // Create an array string literal containing all the elements
-      final exportString = '[${literals.join(', ')}]';
+      final exportString = _formulaAndDependenciesToStringLiteral(formula);
 
       // Share the string
       await share_plus.SharePlus.instance.share(
@@ -90,14 +89,7 @@ class _FormulaListState extends State<FormulaList> {
 
   void _copyFormula(Formula formula) async {
     try {
-      // Get the formula and its dependencies
-      final dependencies = widget.corpus.withDependencies(formula);
-      
-      // Convert each dependency to its string literal representation
-      final literals = dependencies.map((element) => element.toStringLiteral()).toList();
-      
-      // Create an array string literal containing all the elements
-      final exportString = '[${literals.join(', ')}]';
+      final exportString = _formulaAndDependenciesToStringLiteral(formula);
       
       // Copy to clipboard
       await Clipboard.setData(ClipboardData(text: exportString));

lib/ai/formula_screen.dart

@@ -63,10 +63,10 @@ class D4rtEditingController extends TextEditingController {
     if( _validateAsD4rtExpression(text) && _lastValue is StringResult ){
       return true;
     }
-    if( _validateAsD4rtExpression('"' + text + '"') && _lastValue is StringResult ){
+    if( _validateAsD4rtExpression('"$text"') && _lastValue is StringResult ){
       return true;
     }    
-    if( _validateAsD4rtExpression("'" + text + "'") && _lastValue is StringResult ){
+    if( _validateAsD4rtExpression("'$text'") && _lastValue is StringResult ){
       return true;
     }
     return false;

lib/database/database_service.dart

@@ -1,3 +1,4 @@
+import '../formula_models.dart';
 import 'corpus_database_interface.dart';
 import 'formulas_database.dart';
 import 'package:d4rt_formulas/formula_models.dart' as models;
@@ -11,7 +12,7 @@ extension CorpusDatabaseExtension on FormulasDatabase {
 
     for (final element in elements) {
       try {
-        final parsed = models.parseCorpusElements('[${element.elementText}]');
+        final parsed = SetUtils.parseCorpusElements('[${element.elementText}]');
         print("PARSED:$element");
         parsedElements.addAll(parsed);
       } catch (e) {

lib/formula_models.dart

@@ -2,6 +2,8 @@ import 'package:d4rt/d4rt.dart';
 import 'package:collection/collection.dart';
 import 'package:d4rt_formulas/d4rt_formulas.dart';
 
+typedef Number = double;
+
 abstract class SetUtils {
   static Object safeGet(Map<Object?, Object?> map, String key) {
     if (!map.containsKey(key)) {
@@ -21,69 +23,160 @@ abstract class SetUtils {
   static Number numberValue(Map<Object?, Object?> map, String key) {
     return double.parse(stringValue(map, key));
   }
-}
 
-/// Parses a d4rt array literal (containing maps and arrays) to a List<Object?>
-/// using d4rt
-List<Object?> parseD4rtLiteral(String arrayStringLiteral) {
-  var d4rt = D4rt();
-  final buffer = StringBuffer();
-  buffer.write("main(){ return $arrayStringLiteral; }");
-  final code = buffer.toString();
+  /// Parses a d4rt array literal (containing maps and arrays) to a List<Object?>
+  /// using d4rt
+  static List<Object?> parseD4rtLiteral(String arrayStringLiteral) {
+    var d4rt = D4rt();
+    final buffer = StringBuffer();
+    buffer.write("main(){ return $arrayStringLiteral; }");
+    final code = buffer.toString();
 
-  final List<Object?> list = d4rt.execute(source: code);
+    final List<Object?> list = d4rt.execute(source: code);
 
-  return list;
-}
+    return list;
+  }
 
-/// Escapes special characters in a string for use in D4RT literals
-String escapeD4rtString(String input) {
-  return input
-      .replaceAll(r'\', r'\\')  // Escape backslashes first
-      .replaceAll('\n', r'\n')   // Escape newlines
-      .replaceAll('\r', r'\r')   // Escape carriage returns
-      .replaceAll('\t', r'\t')   // Escape tabs
-      .replaceAll('"', r'\"');   // Escape quotes last
-}
+  /// Escapes special characters in a string for use in D4RT literals
+  @deprecated
+  static String escapeD4rtString(String input) {
+    return input
+        .replaceAll(r'\\', r'\\\\') // escape backslashes first
+        .replaceAll('\n', r'\\n')
+        .replaceAll('\r', r'\\r')
+        .replaceAll('\t', r'\\t')
+        .replaceAll('"', r'\\"');
+  }
 
-/// Parses corpus elements from an array string literal.
-/// Determines if each element is a formula or a unit and converts accordingly.
-List<FormulaElement> parseCorpusElements(String arrayStringLiteral) {
-  final List<Object?> elements = parseD4rtLiteral(arrayStringLiteral);
+  /// Parses corpus elements from an array string literal.
+  /// Determines if each element is a formula or a unit and converts accordingly.
+  static List<FormulaElement> parseCorpusElements(String arrayStringLiteral) {
+    final List<Object?> elements = parseD4rtLiteral(arrayStringLiteral);
 
-  final List<FormulaElement> result = [];
-  for (final element in elements) {
-    if (element is Map<Object?, Object?>) {
-      // Check if it's a formula by looking for required formula properties
-      // Formulas typically have 'd4rtCode' and 'input'/'output' properties
-      if (element.containsKey('d4rtCode')) {
-        result.add(Formula.fromSet(element));
-      }
-      // Units typically have 'name', 'symbol', and 'baseUnit' properties
-      else if (element.containsKey('name') && element.containsKey('symbol')) {
-        result.add(UnitSpec.fromSet(element));
-      }
-      else {
-        throw ArgumentError('Unknown element type: $element');
+    final List<FormulaElement> result = [];
+    for (final element in elements) {
+      if (element is Map<Object?, Object?>) {
+        if (element.containsKey('d4rtCode')) {
+          result.add(Formula.fromSet(element));
+        } else
+        if (element.containsKey('name') && element.containsKey('symbol')) {
+          result.add(UnitSpec.fromSet(element));
+        } else {
+          throw ArgumentError('Unknown element type: $element');
+        }
+      } else {
+        throw ArgumentError('Element must be a Map: $element');
       }
+    }
+
+    return result;
+  }
+
+  /// Pretty prints a dynamic value (Set, Array, string or number) as a Dart literal.
+  /// Uses JSON-like formatting but for Dart language, with proper indentation.
+  static String prettyPrint(dynamic value, {int indent = 0}) {
+    if (value   is String) {
+      return _prettyPrintString(value, indent);
+    } else if (value is num) {
+      return _prettyPrintNumber(value, indent);
+    } else if (value is Set) {
+      return _prettyPrintSet(value, indent);
+    } else if (value is List) {
+      return _prettyPrintArray(value, indent);
+    } else if (value is Map) {
+      return _prettyPrintMap(value, indent);
     } else {
-      throw ArgumentError('Element must be a Map: $element');
+      return value.toString();
     }
   }
 
-  return result;
+  /// Pretty prints a simple string, escaping special characters if needed.
+  static String _prettyPrintString(String s, int indent) {
+    // Check if the string needs raw string formatting (newlines, $, backslashes, quotes)
+    final needsRawString = s.contains('\n') || 
+                            s.contains(r'$') || 
+                            s.contains(r'\') || 
+                            s.contains('"');
+    
+    if (needsRawString) {
+      return _prettyPrintRawString(s, indent);
+    }
+    
+    // Simple string with escaped quotes
+    return '"${s.replaceAll('"', r'\"')}"';
+    //'
+  }
+
+  /// Pretty prints a number.
+  static String _prettyPrintNumber(num n, int indent) {
+    return n.toString();
+  }
+
+  /// Pretty prints a Set as a Dart set literal.
+  static String _prettyPrintSet(Set s, int indent) {
+    if (s.isEmpty) {
+      return '{}';
+    }
+    
+    final indentStr = '  ' * indent;
+    final innerIndent = '  ' * (indent + 1);
+    
+    final elements = s.map((e) => '$innerIndent${prettyPrint(e, indent: indent + 1)}').join(',\n');
+    return '{$elements\n$indentStr}';
+  }
+
+  /// Pretty prints an Array/List as a Dart list literal.
+  static String _prettyPrintArray(List a, int indent) {
+    if (a.isEmpty) {
+      return '[]';
+    }
+    
+    final indentStr = '  ' * indent;
+    final innerIndent = '  ' * (indent + 1);
+    
+    final elements = a.map((e) => '$innerIndent${prettyPrint(e, indent: indent + 1)}').join(',\n');
+    return '[\n$elements\n$indentStr]';
+  }
+
+  /// Pretty prints a Map as a Dart map literal.
+  static String _prettyPrintMap(Map m, int indent) {
+    if (m.isEmpty) {
+      return '{}';
+    }
+
+    final indentStr = '  ' * indent;
+    final innerIndent = '  ' * (indent + 1);
+    
+    final entries = m.entries.map((e) {
+      final key = prettyPrint(e.key, indent: indent + 1);
+      final value = prettyPrint(e.value, indent: indent + 1);
+      return '$innerIndent$key: $value';
+    }).join(',\n');
+    
+    return '{\n$entries\n$indentStr}';
+  }
+
+  /// Pretty prints a raw string (for strings containing newlines, $, backslashes, etc.)
+  /// Uses Dart's raw string syntax r"""..."""
+  static String _prettyPrintRawString(String s, int indent) {
+    // Escape triple quotes by replacing """ with ""\"
+    final escaped = s.replaceAll('"""', r'""\"');
+    return 'r"""$escaped"""';
+  }
 }
 
-typedef Number = double;
 
 /// Abstract base class for formula elements
 abstract class FormulaElement {
-  /// Creates a string literal representation of the FormulaElement that can be parsed
-  /// by the D4RT parser to recreate the same FormulaElement object.
-  String toStringLiteral();
+  Map<String,dynamic> toMap();
+
+  String toStringLiteral() {
+    final map = toMap();
+    return SetUtils.prettyPrint(map);
+  }
 }
 
-class UnitSpec implements FormulaElement {
+class UnitSpec extends FormulaElement {
   final String name;
   final String baseUnit;
   final String symbol;
@@ -91,6 +184,19 @@ class UnitSpec implements FormulaElement {
   final String? codeFromUnitToBase;
   final String? codeFromBaseToUnit;
 
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      "name": name,
+      "baseUnit": baseUnit,
+      "symbol": symbol,
+      if (factorFromUnitToBase != null) 'factor': factorFromUnitToBase,
+      if (codeFromUnitToBase != null) 'toBase': codeFromUnitToBase,
+      if (codeFromBaseToUnit != null) 'fromBase': codeFromBaseToUnit,
+    };
+  }
+
+
   UnitSpec({
     required this.name,
     required this.baseUnit,
@@ -104,7 +210,7 @@ class UnitSpec implements FormulaElement {
     String name = SetUtils.stringValue(theSet, "name");
     String symbol = SetUtils.stringValue(theSet, "symbol");
 
-    if( theSet.containsKey("isBase") ){
+    if (theSet.containsKey("isBase")) {
       return UnitSpec(name: name, baseUnit: name, symbol: symbol, factorFromUnitToBase: 1);
     }
 
@@ -118,76 +224,56 @@ class UnitSpec implements FormulaElement {
         symbol: symbol,
         factorFromUnitToBase: factorFromUnitToBase,
       );
-    }
-    else if( theSet.containsKey("toBase")) {
-      String codeFromBaseToUnit = SetUtils.stringValue(
-        theSet,
-        "fromBase",
+    } else if (theSet.containsKey("toBase")) {
+      String codeFromBaseToUnit = SetUtils.stringValue(theSet, "fromBase");
+      String codeFromUnitToBase = SetUtils.stringValue(theSet, "toBase");
+
+      return UnitSpec(
+        name: name,
+        baseUnit: baseUnit,
+        symbol: symbol,
+        codeFromBaseToUnit: codeFromBaseToUnit,
+        codeFromUnitToBase: codeFromUnitToBase,
       );
-      String codeFromUnitToBase = SetUtils.stringValue(
-        theSet,
-        "toBase",
-      );
-
-      return UnitSpec(name: name,
-          baseUnit: baseUnit,
-          symbol: symbol,
-          codeFromBaseToUnit: codeFromBaseToUnit,
-          codeFromUnitToBase: codeFromUnitToBase);
+    } else {
+      throw ArgumentError("Need factor or toBase/fromBase");
     }
-    else{
-      throw ArgumentError( "Need factor or toBase/fromBase");
-    }
-
-
   }
 
   static List<UnitSpec> fromArrayStringLiteral(String arrayStringLiteral) {
-    final List<Object?> list = parseD4rtLiteral(arrayStringLiteral);
+    final List<Object?> list = SetUtils.parseD4rtLiteral(arrayStringLiteral);
 
     final units = list.map((set) => UnitSpec.fromSet(set as Map));
 
     return units.toList(growable: false);
   }
 
-  @override
-  String toStringLiteral() {
-    final buffer = StringBuffer('{');
-    buffer.write('"name": "${escapeD4rtString(name)}", "symbol": "${escapeD4rtString(symbol)}"');
-
-    if (name == baseUnit && factorFromUnitToBase == 1) {
-      // This is a base unit
-      buffer.write(', "isBase": true');
-    } else {
-      buffer.write(', "baseUnit": "${escapeD4rtString(baseUnit)}"');
-
-      if (factorFromUnitToBase != null) {
-        buffer.write(', "factor": $factorFromUnitToBase');
-      } else if (codeFromUnitToBase != null && codeFromBaseToUnit != null) {
-        buffer.write(', "toBase": "${escapeD4rtString(codeFromUnitToBase!)}", "fromBase": "${escapeD4rtString(codeFromBaseToUnit!)}"');
-      }
-    }
-
-    buffer.write('}');
-    return buffer.toString();
-  }
 }
 
-class VariableSpec {
+class VariableSpec extends FormulaElement{
   final String name;
   final String? unit;
   final List<dynamic>? values;
 
-  VariableSpec({required this.name, this.unit, this.values}){
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      'name': name,
+      if (unit != null) 'unit': unit,
+      if (values != null) 'values': List.from(values!,growable: false),
+    };
+ }
+
+  VariableSpec({required this.name, this.unit, this.values}) {
     validate();
   }
 
-  void validate(){
-    if( FormulaEvaluator.reservedVariableNames.contains(name) ){
+  void validate() {
+    if (FormulaEvaluator.reservedVariableNames.contains(name)) {
       throw ArgumentError("$name: is a reserved variable name for FormulaEvaluator");
     }
     final valuesValid = values != null && values?.isNotEmpty == true;
-    if( unit == null && !valuesValid ){
+    if (unit == null && !valuesValid) {
       throw ArgumentError("$name: at least unit or allowedValues should be valid");
     }
   }
@@ -207,31 +293,10 @@ class VariableSpec {
   @override
   int get hashCode => Object.hash(unit, name, values != null ? const DeepCollectionEquality().hash(values!) : 0);
 
-  @override
-  String toStringLiteral() {
-    final buffer = StringBuffer('{');
-    buffer.write('"name": "${escapeD4rtString(name)}"');
 
-    if (unit != null) {
-      buffer.write(', "unit": "${escapeD4rtString(unit!)}"');
-    }
-
-    if (values != null && values!.isNotEmpty) {
-      buffer.write(', "values": [${values!.map((value) {
-        if (value is String) {
-          return '"${escapeD4rtString(value)}"';
-        } else {
-          return value.toString();
-        }
-      }).join(", ")}]');
-    }
-
-    buffer.write('}');
-    return buffer.toString();
-  }
 }
 
-class Formula implements FormulaElement {
+class Formula extends FormulaElement {
   final String name;
   final String? description;
   final List<VariableSpec> input;
@@ -239,6 +304,18 @@ class Formula implements FormulaElement {
   final String d4rtCode;
   final List<String> tags;
 
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      'name': name,
+      if (description != null) 'description': description,
+      'input': input.map((v) => v.toMap()).toList(growable: false),
+      'output': output.toMap(),
+      'd4rtCode': d4rtCode,
+      if (tags.isNotEmpty) 'tags': List.from(tags, growable: false),
+    };
+  }
+
   Formula({
     required this.name,
     this.description,
@@ -251,7 +328,9 @@ class Formula implements FormulaElement {
   }
 
   void validate() {
-    if (name.trim().isEmpty) {
+    if (name
+        .trim()
+        .isEmpty) {
       throw ArgumentError('Formula name cannot be empty');
     }
   }
@@ -263,18 +342,20 @@ class Formula implements FormulaElement {
   @override
   bool operator ==(Object other) =>
       identical(this, other) ||
-      other is Formula &&
-          runtimeType == other.runtimeType &&
-          name == other.name &&
-          description == other.description &&
-          output == other.output &&
-          ListEquality().equals(input, other.input) &&
-          d4rtCode == other.d4rtCode &&
-          ListEquality().equals(tags, other.tags);
+          other is Formula &&
+              runtimeType == other.runtimeType &&
+              name == other.name &&
+              description == other.description &&
+              output == other.output &&
+              ListEquality().equals(input, other.input) &&
+              d4rtCode == other.d4rtCode &&
+              ListEquality().equals(tags, other.tags);
 
   @override
   int get hashCode =>
-      Object.hash(name, description, ListEquality().hash(input), output, d4rtCode, ListEquality().hash(tags));
+      Object.hash(
+          name, description, ListEquality().hash(input), output, d4rtCode,
+          ListEquality().hash(tags));
 
   List<String> inputVarNames() =>
       input.map((v) => v.name).toList(growable: false);
@@ -291,7 +372,7 @@ class Formula implements FormulaElement {
   }
 
   static List<Formula> fromArrayStringLiteral(String arrayStringLiteral) {
-    final List<Object?> list = parseD4rtLiteral(arrayStringLiteral);
+    final List<Object?> list = SetUtils.parseD4rtLiteral(arrayStringLiteral);
 
     final formulas = list.map((set) => Formula.fromSet(set as Map));
 
@@ -309,9 +390,11 @@ class Formula implements FormulaElement {
       if (allowed != null) {
         final types = allowed.map((v) => v.runtimeType).toSet();
         if (types.length > 1) {
-          throw ArgumentError('Allowed values must be all Strings or all Numbers');
+          throw ArgumentError(
+              'Allowed values must be all Strings or all Numbers');
         }
-        if (!types.contains(String) && !types.contains(double) && !types.contains(int)) {
+        if (!types.contains(String) && !types.contains(double) &&
+            !types.contains(int)) {
           throw ArgumentError('Allowed values must be Strings or Numbers');
         }
       }
@@ -323,13 +406,13 @@ class Formula implements FormulaElement {
     }
 
     String name = SetUtils.stringValue(theSet, "name");
-    String? description = theSet ["description"] as String?;
-    List<String> tags = (theSet["tags"] as List<Object?>? ?? []).map((t) => t.toString()).toList();
+    String? description = theSet["description"] as String?;
+    List<String> tags = (theSet["tags"] as List<Object?>? ?? []).map((t) =>
+        t.toString()).toList();
     final List<Object?> inputSet = SetUtils.listValue(theSet, "input");
-    List<VariableSpec> input = inputSet
-        .map((v) => parseVar(v as Map))
-        .toList(growable: false);
-    Map<Object?, Object?> outputSet = theSet.get("output");
+    List<VariableSpec> input = inputSet.map((v) => parseVar(v as Map)).toList(
+        growable: false);
+    Map<Object?, Object?> outputSet = theSet['output'] as Map<Object?, Object?>;
     VariableSpec output = parseVar(outputSet);
     String d4rtCode = SetUtils.stringValue(theSet, "d4rtCode");
 
@@ -342,30 +425,5 @@ class Formula implements FormulaElement {
       d4rtCode: d4rtCode,
     );
   }
-
-  /// Creates a string literal representation of the Formula that can be parsed
-  /// by the D4RT parser to recreate the same Formula object.
-  @override
-  String toStringLiteral() {
-    final inputStrings = input.map((varSpec) => varSpec.toStringLiteral()).toList();
-
-    final buffer = StringBuffer('{');
-    buffer.write('"name": "$name"');
-
-    if (description != null) {
-      buffer.write(', "description": r"""${description!}"""');
-    }
-
-    buffer.write(', "input": [${inputStrings.join(", ")}]');
-    buffer.write(', "output": ${output.toStringLiteral()}');
-    
-    buffer.write(', "d4rtCode": r"""$d4rtCode"""');
-
-    if (tags.isNotEmpty) {
-      buffer.write(', "tags": [${tags.map((tag) => '"${escapeD4rtString(tag)}"').join(", ")}]');
-    }
-
-    buffer.write('}');
-    return buffer.toString();
-  }
 }
+

lib/main.dart

@@ -2,7 +2,6 @@ import 'package:d4rt_formulas/d4rt_formulas.dart';
 import 'package:flutter/material.dart';
 import 'package:get_it/get_it.dart';
 import 'database/database_service.dart';
-import 'package:drift/drift.dart' as drift;
 import 'service_locator.dart';
 
 import 'ai/formula_list.dart';

test/dart_test.dart

@@ -1,6 +1,5 @@
 import 'package:test/test.dart';
-import 'package:d4rt/d4rt.dart';
-import 'dart:math' as Math;
+
 
 
 void main(){

test/database_test.dart

@@ -1,5 +1,4 @@
 import 'package:flutter_test/flutter_test.dart';
-import 'package:d4rt_formulas/database/database_service.dart';
 import 'package:d4rt_formulas/service_locator.dart';
 
 void main() {

test/formula_models_test.dart

@@ -154,7 +154,7 @@ void main() {
     );
 
     final literal = originalUnit.toStringLiteral();
-    final parsedList = parseD4rtLiteral('[${literal}]');
+    final parsedList = SetUtils.parseD4rtLiteral('[${literal}]');
     final parsedMap = parsedList[0] as Map<Object?, Object?>;
     final parsedUnit = UnitSpec.fromSet(parsedMap);
 
@@ -285,4 +285,5 @@ void main() {
     expect(dependencies.length, equals(uniqueDependencies.length));
   });
 
+
 }

test/physics_trigonometry_formulas_test.dart

@@ -2,7 +2,6 @@ import 'package:d4rt_formulas/corpus.dart';
 import 'package:d4rt_formulas/defaults/default_corpus.dart';
 import 'package:d4rt_formulas/formula_evaluator.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:d4rt_formulas/formula_models.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();