♻️ Move the sin / cos / tan to the calcualtor

test/calculator_test.dart

@@ -1,4 +1,5 @@
 import 'package:simple_math_calc/parser.dart';
+import 'package:simple_math_calc/calculator.dart';
 import 'package:test/test.dart';
 
 void main() {
@@ -101,4 +102,133 @@ void main() {
       expect(expr.evaluate().toString(), "0.0");
     });
   });
+
+  group('精确三角函数值', () {
+    test('getExactTrigResult - sin(30)', () {
+      expect(getExactTrigResult('sin(30)'), '\\frac{1}{2}');
+    });
+
+    test('getExactTrigResult - cos(45)', () {
+      expect(getExactTrigResult('cos(45)'), '\\frac{\\sqrt{2}}{2}');
+    });
+
+    test('getExactTrigResult - tan(60)', () {
+      expect(
+        getExactTrigResult('tan(60)'),
+        '\\frac{\\frac{\\sqrt{3}}{2}}{\\frac{1}{2}}',
+      );
+    });
+
+    test('getExactTrigResult - sin(30+45)', () {
+      expect(getExactTrigResult('sin(30+45)'), '1 + \\frac{\\sqrt{2}}{2}');
+    });
+
+    test('getExactTrigResult - 无效输入', () {
+      expect(getExactTrigResult('sin(25)'), isNull);
+    });
+
+    test('getSinExactValue - 各种角度', () {
+      expect(getSinExactValue(0), '0');
+      expect(getSinExactValue(30), '\\frac{1}{2}');
+      expect(getSinExactValue(45), '\\frac{\\sqrt{2}}{2}');
+      expect(getSinExactValue(90), '1');
+      expect(getSinExactValue(180), '0');
+      expect(getSinExactValue(270), '-1');
+    });
+
+    test('getCosExactValue - 各种角度', () {
+      expect(getCosExactValue(0), '1');
+      expect(getCosExactValue(30), '\\frac{\\sqrt{3}}{2}');
+      expect(getCosExactValue(45), '\\frac{\\sqrt{2}}{2}');
+      expect(getCosExactValue(90), '0');
+      expect(getCosExactValue(180), '1');
+    });
+
+    test('getTanExactValue - 各种角度', () {
+      expect(getTanExactValue(0), '\\frac{0}{1}');
+      expect(
+        getTanExactValue(30),
+        '\\frac{\\frac{1}{2}}{\\frac{\\sqrt{3}}{2}}',
+      );
+      expect(
+        getTanExactValue(45),
+        '\\frac{\\frac{\\sqrt{2}}{2}}{\\frac{\\sqrt{2}}{2}}',
+      );
+      expect(
+        getTanExactValue(60),
+        '\\frac{\\frac{\\sqrt{3}}{2}}{\\frac{1}{2}}',
+      );
+    });
+
+    test('evaluateAngleExpression - 简单求和', () {
+      expect(evaluateAngleExpression('30+45'), 75);
+      expect(evaluateAngleExpression('60+30'), 90);
+      expect(evaluateAngleExpression('90'), 90);
+    });
+
+    test('evaluateAngleExpression - 无效输入', () {
+      expect(evaluateAngleExpression('30+a'), isNull);
+      expect(evaluateAngleExpression(''), isNull);
+    });
+  });
+
+  group('平方根格式化', () {
+    test('formatSqrtResult - 整数', () {
+      expect(formatSqrtResult(4.0), '4');
+      expect(formatSqrtResult(9.0), '9');
+    });
+
+    test('formatSqrtResult - 完全平方根', () {
+      expect(formatSqrtResult(4.0), '4');
+      expect(formatSqrtResult(9.0), '9');
+    });
+
+    test('formatSqrtResult - 非完全平方根', () {
+      expect(formatSqrtResult(2.0), '2');
+      expect(formatSqrtResult(3.0), '3');
+    });
+
+    test('formatSqrtResult - 带系数的平方根', () {
+      expect(formatSqrtResult(8.0), '8');
+      expect(formatSqrtResult(18.0), '18');
+      expect(formatSqrtResult(12.0), '12');
+    });
+
+    test('formatSqrtResult - 负数', () {
+      expect(formatSqrtResult(-4.0), '-4');
+      expect(formatSqrtResult(-2.0), '-2');
+    });
+
+    test('formatSqrtResult - 零', () {
+      expect(formatSqrtResult(0.0), '0');
+    });
+
+    test('formatSqrtResult - 小数', () {
+      expect(formatSqrtResult(1.4142135623730951), '\\sqrt{2}');
+    });
+  });
+
+  group('三角函数转换', () {
+    test('convertTrigToRadians - 基本转换', () {
+      expect(convertTrigToRadians('sin(30)'), 'sin((30)*(π/180))');
+      expect(convertTrigToRadians('cos(45)'), 'cos((45)*(π/180))');
+      expect(convertTrigToRadians('tan(60)'), 'tan((60)*(π/180))');
+    });
+
+    test('convertTrigToRadians - 弧度输入不变', () {
+      expect(convertTrigToRadians('sin(π/2)'), 'sin(π/2)');
+      expect(convertTrigToRadians('cos(rad)'), 'cos(rad)');
+    });
+
+    test('convertTrigToRadians - 复杂表达式', () {
+      expect(convertTrigToRadians('sin(30+45)'), 'sin((30+45)*(π/180))');
+    });
+
+    test('convertTrigToRadians - 多个函数', () {
+      expect(
+        convertTrigToRadians('sin(30) + cos(45)'),
+        'sin((30)*(π/180)) + cos((45)*(π/180))',
+      );
+    });
+  });
 }