test(functions): add math, aggregate and stats tests

2026-08-28 11:17:00 +02:00
1 parent e0d5adb91c
commit c31cea00f7
@@ -0,0 +1,80 @@
+import 'package:cellar/cellar.dart';
+import 'package:test/test.dart';
+
+CellValue ev(String formula) {
+  final sheet = Sheet();
+  sheet.setValue('Z1', formula);
+  return sheet.valueOf('Z1');
+}
+
+double num(CellValue value) => (value as NumberValue).value;
+
+void main() {
+  group('math functions', () {
+    test('rounding family', () {
+      expect(num(ev('=ROUND(3.14159, 2)')), 3.14);
+      expect(num(ev('=ROUNDUP(3.141, 2)')), 3.15);
+      expect(num(ev('=ROUNDDOWN(3.149, 2)')), 3.14);
+      expect(num(ev('=ROUNDUP(-3.141, 2)')), -3.15);
+      expect(num(ev('=MROUND(17, 5)')), 15);
+      expect(num(ev('=TRUNC(9.99)')), 9);
+      expect(num(ev('=INT(-1.1)')), -2);
+    });
+
+    test('modulo and quotient', () {
+      expect(num(ev('=MOD(10, 3)')), 1);
+      expect(num(ev('=MOD(-10, 3)')), 2);
+      expect(num(ev('=QUOTIENT(17, 5)')), 3);
+      expect(ev('=QUOTIENT(1, 0)'), const ErrorValue(ErrorKind.divZero));
+    });
+
+    test('powers, roots and logs', () {
+      expect(num(ev('=POWER(2, 10)')), 1024);
+      expect(num(ev('=SQRT(144)')), 12);
+      expect(num(ev('=EXP(0)')), 1);
+      expect(num(ev('=LN(EXP(3))')), closeTo(3, 1e-9));
+      expect(num(ev('=LOG10(1000)')), closeTo(3, 1e-9));
+      expect(num(ev('=LOG(8, 2)')), closeTo(3, 1e-9));
+      expect(ev('=SQRT(-1)'), const ErrorValue(ErrorKind.numError));
+      expect(ev('=LN(0)'), const ErrorValue(ErrorKind.numError));
+    });
+
+    test('sign, even, odd', () {
+      expect(num(ev('=SIGN(-7)')), -1);
+      expect(num(ev('=EVEN(3)')), 4);
+      expect(num(ev('=EVEN(-1)')), -2);
+      expect(num(ev('=ODD(2)')), 3);
+      expect(num(ev('=ODD(-4)')), -5);
+    });
+
+    test('floor and ceil with significance', () {
+      expect(num(ev('=FLOOR(7.8)')), 7);
+      expect(num(ev('=FLOOR(23, 5)')), 20);
+      expect(num(ev('=CEILING(23, 5)')), 25);
+    });
+
+    test('gcd, lcm, factorial, combinations', () {
+      expect(num(ev('=GCD(24, 36)')), 12);
+      expect(num(ev('=LCM(4, 6)')), 12);
+      expect(num(ev('=FACT(5)')), 120);
+      expect(num(ev('=COMBIN(5, 2)')), 10);
+      expect(ev('=FACT(-1)'), const ErrorValue(ErrorKind.numError));
+    });
+
+    test('trigonometry and conversions', () {
+      expect(num(ev('=SIN(0)')), 0);
+      expect(num(ev('=COS(0)')), 1);
+      expect(num(ev('=DEGREES(PI())')), closeTo(180, 1e-9));
+      expect(num(ev('=RADIANS(180)')), closeTo(3.14159265, 1e-6));
+      expect(num(ev('=ATAN2(1, 1)')), closeTo(0.785398, 1e-5));
+    });
+
+    test('RANDBETWEEN stays within bounds', () {
+      for (var i = 0; i < 50; i++) {
+        final value = num(ev('=RANDBETWEEN(3, 7)'));
+        expect(value, inInclusiveRange(3, 7));
+        expect(value, value.roundToDouble());
+      }
+    });
+  });
+}