spectre.console/test/Spectre.Console.Tests/Unit/AnsiConsoleTests.cs

using System;
using Shouldly;
using Spectre.Console.Testing;
using Xunit;

namespace Spectre.Console.Tests.Unit
{
    public partial class AnsiConsoleTests
    {
        public sealed class Clear
        {
            [Theory]
            [InlineData(false, "HelloWorld")]
            [InlineData(true, "HelloWorld")]
            public void Should_Clear_Screen(bool home, string expected)
            {
                // Given
                var console = new TestConsole()
                    .Colors(ColorSystem.Standard)
                    .EmitAnsiSequences();

                // When
                console.Write("Hello");
                console.Clear(home);
                console.Write("World");

                // Then
                console.Output.ShouldBe(expected);
            }
        }

        public sealed class Write
        {
            [Fact]
            public void Should_Combine_Decoration_And_Colors()
            {
                // Given
                var console = new TestConsole()
                    .Colors(ColorSystem.Standard)
                    .EmitAnsiSequences();

                // When
                console.Write(
                    "Hello",
                    new Style()
                        .Foreground(Color.RoyalBlue1)
                        .Background(Color.NavajoWhite1)
                        .Decoration(Decoration.Italic));

                // Then
                console.Output.ShouldBe("\u001b[3;90;47mHello\u001b[0m");
            }

            [Fact]
            public void Should_Not_Include_Foreground_If_Set_To_Default_Color()
            {
                // Given
                var console = new TestConsole()
                    .Colors(ColorSystem.Standard)
                    .EmitAnsiSequences();

                // When
                console.Write(
                    "Hello",
                    new Style()
                        .Foreground(Color.Default)
                        .Background(Color.NavajoWhite1)
                        .Decoration(Decoration.Italic));

                // Then
                console.Output.ShouldBe("\u001b[3;47mHello\u001b[0m");
            }

            [Fact]
            public void Should_Not_Include_Background_If_Set_To_Default_Color()
            {
                // Given
                var console = new TestConsole()
                    .Colors(ColorSystem.Standard)
                    .EmitAnsiSequences();

                // When
                console.Write(
                    "Hello",
                    new Style()
                        .Foreground(Color.RoyalBlue1)
                        .Background(Color.Default)
                        .Decoration(Decoration.Italic));

                // Then
                console.Output.ShouldBe("\u001b[3;90mHello\u001b[0m");
            }

            [Fact]
            public void Should_Not_Include_Decoration_If_Set_To_None()
            {
                // Given
                var console = new TestConsole()
                    .Colors(ColorSystem.Standard)
                    .EmitAnsiSequences();

                // When
                console.Write(
                    "Hello",
                    new Style()
                        .Foreground(Color.RoyalBlue1)
                        .Background(Color.NavajoWhite1)
                        .Decoration(Decoration.None));

                // Then
                console.Output.ShouldBe("\u001b[90;47mHello\u001b[0m");
            }
        }

        public sealed class WriteLine
        {
            [Fact]
            public void Should_Reset_Colors_Correctly_After_Line_Break()
            {
                // Given
                var console = new TestConsole()
                    .Colors(ColorSystem.Standard)
                    .EmitAnsiSequences();

                // When
                console.WriteLine("Hello", new Style().Background(ConsoleColor.Red));
                console.WriteLine("World", new Style().Background(ConsoleColor.Green));

                // Then
                console.Output.NormalizeLineEndings()
                    .ShouldBe("Hello\nWorld\n");
            }

            [Fact]
            public void Should_Reset_Colors_Correctly_After_Line_Break_In_Text()
            {
                // Given
                var console = new TestConsole()
                    .Colors(ColorSystem.Standard)
                    .EmitAnsiSequences();

                // When
                console.WriteLine("Hello\nWorld", new Style().Background(ConsoleColor.Red));

                // Then
                console.Output.NormalizeLineEndings()
                    .ShouldBe("Hello\nWorld\n");
            }
        }
    }
}