tests

QWERTYkez.Mensura.Tests/CollectionsRootOfSquareExtensions.cs

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+namespace QWERTYkez.Mensura.Tests;
+
+public class CollectionsRootOfSquareExtensions
+{
+    [Fact]
+    public void Sqrt_Array_ShouldCalculateCorrectly()
+    {
+        // Arrange
+        Length[] source = [new(4), new(9), new(16)];
+
+        // Act
+        Length[] result = source.Sqrt<Length, Length>();
+
+        // Assert
+        Assert.Equal(2, result[0]._Value);
+        Assert.Equal(3, result[1]._Value);
+        Assert.Equal(4, result[2]._Value);
+    }
+
+    [Fact]
+    public void Sqrt_NullableArray_ShouldHandleNulls()
+    {
+        // Arrange
+        Length?[] source = [new(25), null, new(100)];
+
+        // Act
+        Length?[] result = source.Sqrt<Length, Length>();
+
+        // Assert
+        Assert.Equal(5, result[0]?._Value);
+        Assert.Null(result[1]);
+        Assert.Equal(10, result[2]?._Value);
+    }
+
+    [Fact]
+    public void Sqrt_List_ShouldReturnCorrectList()
+    {
+        // Arrange
+        var source = new List<Length> { new(1), new(4), new(9) };
+
+        // Act
+        var result = source.Sqrt<Length, Length>();
+
+        // Assert
+        Assert.Equal(3, result.Count);
+        Assert.Equal(1, result[0]._Value);
+        Assert.Equal(2, result[1]._Value);
+        Assert.Equal(3, result[2]._Value);
+    }
+
+    [Fact]
+    public void Sqrt_DestinationTooShort_ShouldThrowArgumentException()
+    {
+        // Arrange
+        Length[] source = [new(4), new(9)];
+        Length[] dest = new Length[1]; // Слишком мало
+
+        // Act & Assert
+        Assert.Throws<ArgumentException>(() => source.AsSpan().Sqrt(dest.AsSpan()));
+    }
+
+    [Fact]
+    public void Sqrt_IEnumerable_ShouldWorkWithGenericCollection()
+    {
+        // Arrange
+        IEnumerable<Length> source = new HashSet<Length> { new(16), new(64) };
+
+        // Act
+        var result = source.Sqrt<Length, Length>().ToList();
+
+        // Assert
+        Assert.Contains(result, x => x._Value == 4);
+        Assert.Contains(result, x => x._Value == 8);
+    }
+}