spectre.console/test/Spectre.Console.Tests/Unit/Widgets/RuleTests.cs

namespace Spectre.Console.Tests.Unit;

[UsesVerify]
[ExpectationPath("Widgets/Rule")]
public sealed class RuleTests
{
    [Fact]
    [Expectation("Render")]
    public Task Should_Render_Default_Rule_Without_Title()
    {
        // Given
        var console = new TestConsole().Width(40);

        // When
        console.Write(new Rule());

        // Then
        return Verifier.Verify(console.Output);
    }

    [Fact]
    [Expectation("Render_Border_NoHeader")]
    public Task Should_Render_Default_Rule_With_Specified_Border()
    {
        // Given
        var console = new TestConsole().Width(40);

        // When
        console.Write(new Rule().DoubleBorder());

        // Then
        return Verifier.Verify(console.Output);
    }

    [Fact]
    [Expectation("Render_Border_Header")]
    public Task Should_Render_With_Specified_Box()
    {
        // Given
        var console = new TestConsole().Width(40);

        // When
        console.Write(new Rule("Hello World").DoubleBorder());

        // Then
        return Verifier.Verify(console.Output);
    }

    [Fact]
    [Expectation("Render_Header_DefaultAlignment")]
    public Task Should_Render_Default_Rule_With_Title_Centered_By_Default()
    {
        // Given
        var console = new TestConsole().Width(40);

        // When
        console.Write(new Rule("Hello World"));

        // Then
        return Verifier.Verify(console.Output);
    }

    [Fact]
    [Expectation("Render_Header_LeftAligned")]
    public Task Should_Render_Default_Rule_With_Title_Left_Aligned()
    {
        // Given
        var console = new TestConsole().Width(40);

        // When
        console.Write(new Rule("Hello World")
        {
            Justification = Justify.Left,
        });

        // Then
        return Verifier.Verify(console.Output);
    }

    [Fact]
    [Expectation("Render_Header_RightAligned")]
    public Task Should_Render_Default_Rule_With_Title_Right_Aligned()
    {
        // Given
        var console = new TestConsole().Width(40);

        // When
        console.Write(new Rule("Hello World")
        {
            Justification = Justify.Right,
        });

        // Then
        return Verifier.Verify(console.Output);
    }

    [Fact]
    [Expectation("Render_Linebreaks")]
    public Task Should_Convert_Line_Breaks_In_Title_To_Spaces()
    {
        // Given
        var console = new TestConsole().Width(40);

        // When
        console.Write(new Rule("Hello\nWorld\r\n!"));

        // Then
        return Verifier.Verify(console.Output);
    }

    [Fact]
    [Expectation("Render_Truncate")]
    public Task Should_Truncate_Title()
    {
        // Given
        var console = new TestConsole().Width(40);

        // When
        console.Write(new Rule("          Hello World    "));

        // Then
        return Verifier.Verify(console.Output);
    }

    [Theory]
    [InlineData(1, "Hello World Hello World Hello World Hello World Hello World", "─")]
    [InlineData(2, "Hello World Hello World Hello World Hello World Hello World", "──")]
    [InlineData(3, "Hello World Hello World Hello World Hello World Hello World", "───")]
    [InlineData(4, "Hello World Hello World Hello World Hello World Hello World", "────")]
    [InlineData(5, "Hello World Hello World Hello World Hello World Hello World", "─────")]
    [InlineData(6, "Hello World Hello World Hello World Hello World Hello World", "──────")]
    [InlineData(7, "Hello World Hello World Hello World Hello World Hello World", "───────")]
    [InlineData(8, "Hello World Hello World Hello World Hello World Hello World", "── H… ──")]
    [InlineData(8, "A", "── A ───")]
    [InlineData(8, "AB", "── AB ──")]
    [InlineData(8, "ABC", "── A… ──")]
    [InlineData(40, "Hello World Hello World Hello World Hello World Hello World", "──── Hello World Hello World Hello… ────")]
    public void Should_Truncate_Too_Long_Title(int width, string input, string expected)
    {
        // Given
        var console = new TestConsole().Width(width);

        // When
        console.Write(new Rule(input));

        // Then
        console.Lines.Count.ShouldBe(1);
        console.Lines[0].ShouldBe(expected);
    }
}