Initial commit

MathInterpreter.Test/ScanResultTests.cs

@@ -0,0 +1,32 @@
+using MathInterpreter.Core;
+
+namespace MathInterpreter.Test;
+
+public sealed class ScanResultTests
+{
+    [Fact]
+    public void ScanResult_Construction_Valid()
+    {
+        const int ExpectedValue = -123;
+        const int ExpectedLength = 3;
+        const string ExpectedRemainingExpression = "abc";
+
+        var result = new ScanResult<int>(ExpectedValue, ExpectedLength, ExpectedRemainingExpression);
+
+        result.Value.Should().Be(ExpectedValue);
+        result.Length.Should().Be(ExpectedLength);
+        result.RemainingExpression.ToString().Should().Be(ExpectedRemainingExpression);
+    }
+
+    [Fact]
+    public void ScanResult_Construction_Invalid()
+    {
+        var action = () =>
+        {
+            var _ = new ScanResult<int>(1, -2, string.Empty);
+        };
+
+        action.Should().Throw<ArgumentOutOfRangeException>()
+              .WithMessage("Length must be non-negative (Parameter 'length')");
+    }
+}