69 lines
1.7 KiB
Dart
69 lines
1.7 KiB
Dart
import 'dart:convert';
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import 'package:d4rt/d4rt.dart';
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import 'package:d4rt_formulas/formula_evaluator.dart';
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import 'package:test/test.dart';
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import 'package:d4rt_formulas/formula_models.dart';
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void main() {
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test('Parses Newton\'s second law formula from set literal', () {
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final setLiteral = {
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"name": "Newton's second law",
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"input": [
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{ "name": 'm', "magnitude": 'mass'},
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{ "name": 'a', "magnitude": 'acceleration'}
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],
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"output": { "name": 'F', "magnitude": 'force'},
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"d4rtCode": '''
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return a * m;
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'''
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};
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final formula = Formula.fromSet(setLiteral);
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final evaluator = FormulaEvaluator();
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final result = evaluator.evaluate(formula, {
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'm': 10.0, // 10 kg
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'a': 9.8, // 9.8 m/s²
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});
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expect(result, 98.0); // F = m * a = 10 * 9.8 = 98 N
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});
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test( 'd4rt parses formula from literal', (){
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final literal = """
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{
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"name": "Newton's second law",
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"input": [
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{ "name": 'm', "magnitude": 'mass'},
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{ "name": 'a', "magnitude": 'acceleration'}
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],
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"output": { "name": 'F', "magnitude": 'force'},
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"d4rtCode": '''
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return a * m;
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'''
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}
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""";
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var d4rt = D4rt();
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final buffer = StringBuffer();
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buffer.write( "main(){ return $literal; }");
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final code = buffer.toString();
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final Map<Object?, Object?> setLiteral = d4rt.execute(source: code);
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final formula = Formula.fromSet(setLiteral);
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final evaluator = FormulaEvaluator();
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final result = evaluator.evaluate(formula, {
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'm': 10.0, // 10 kg
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'a': 9.8, // 9.8 m/s²
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});
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expect(result, 98.0); // F = m * a = 10 * 9.8 = 98 N
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});
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}
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