Moduletests/MathTests.cs at master · lenamyro/Moduletests · GitHub

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using Xunit;
using Shouldly;

namespace ModuleTests;

public class MathTests
{

    [Fact]
    [Trait("Category", "Unit")]
    public void SolveQaudratic_WithPositive_C_Argument_Should_ReturnEmpty()
    {
        // Arange
        var b = -1;  // x2 + 1 = 0;

        // Act
        var result = QuadraticHelper.SolveIncompleteQuadraticEquation(b);

        // Assert
        result.Length.ShouldBe(0);
    }

    [Fact]
    [Trait("Category", "Unit")]
    public void SolveQaudratic_WithPositive_C_Argument_Should_ReturnTwoRoots()
    {
        // Arange
        var b = 1;

        // Act
        var result = QuadraticHelper.SolveIncompleteQuadraticEquation(b);

        // Assert
        result.Length.ShouldBe(2);
        result[1].ShouldBe(result[0] * -1);
    }

    [Fact]
    [Trait("Category", "Unit")]
    public void SolveQaudratic_WithPositive_C_Argument_Should_ReturnOneSameRoot()
    {
        // Arange
       // x ^ 2 + 2x + 1 = 0
        var a = 1;
        var b = -2;
        var c = 1;

        // Act
        var result = QuadraticHelper.Solve(a, b, c);

        // Assert
        result.Length.ShouldBe(2);
        result[1].ShouldBe(result[0]);
    }

    [Fact]
    [Trait("Category", "Unit")]
    public void SolveQaudratic_WithPositive_A_Argument_Should_NotBeNull()
    {
        // Arange
        // x ^ 2 + 2x + 1 = 0
        var a = 0;
        var b = -2;
        var c = 1;

        // Act
        try
        {
            var result = QuadraticHelper.Solve(a, b, c);
        }catch(Exception e)
        {
            // Assert
            e.Message.ShouldBe("Argument a can not be 0");
        }

    }
}