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Update Canvas tests

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This commit is contained in:
Patrik Svensson
2021-01-06 09:45:50 +01:00
committed by Patrik Svensson
parent 8901450283
commit 11e192e750
6 changed files with 74 additions and 38 deletions
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5
src/Spectre.Console.Tests/Expectations/Widgets/Canvas/Render.Output.verified.txt Normal file
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src/Spectre.Console.Tests/Expectations/Widgets/Canvas/Render_MaxWidth.Output.verified.txt Normal file
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src/Spectre.Console.Tests/Expectations/Widgets/Canvas/Render_NarrowTerminal.Output.verified.txt Normal file
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src/Spectre.Console.Tests/Expectations/Widgets/Canvas/Render_Nested.Output.verified.txt Normal file
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┌──────┐
│   │
│   │
└──────┘

92
src/Spectre.Console.Tests/Unit/CanvasTests.cs
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@@ -1,57 +1,81 @@
using System;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Shouldly;
using Spectre.Console.Rendering;
using Spectre.Console.Testing;
using Spectre.Verify.Extensions;
using VerifyXunit;
using Xunit;
namespace Spectre.Console.Tests.Unit
{
[UsesVerify]
[ExpectationPath("Widgets/Canvas")]
public class CanvasTests
{
[Fact]
public void Canvas_Must_Have_Proper_Size()
public sealed class TheConstructor
{
Should.Throw<ArgumentException>(() => new Canvas(1, 0));
[Fact]
public void Should_Throw_If_Width_Is_Less_Than_Zero()
{
// Given, When
var result = Record.Exception(() => new Canvas(0, 1));
Should.Throw<ArgumentException>(() => new Canvas(0, 1));
// Then
result.ShouldBeOfType<ArgumentException>()
.And(ex => ex.ParamName.ShouldBe("width"));
}
[Fact]
public void Should_Throw_If_Height_Is_Less_Than_Zero()
{
// Given, When
var result = Record.Exception(() => new Canvas(1, 0));
// Then
result.ShouldBeOfType<ArgumentException>()
.And(ex => ex.ParamName.ShouldBe("height"));
}
}
[Fact]
public void Simple_Render()
[Expectation("Render")]
public async Task Should_Render_Canvas_Correctly()
{
// Given
var console = new FakeAnsiConsole(ColorSystem.Standard);
var canvas = new Canvas(width: 2, height: 2);
canvas.SetPixel(0, 0, Color.Aqua);
canvas.SetPixel(1, 1, Color.Grey);
var canvas = new Canvas(width: 5, height: 5);
canvas.SetPixel(0, 0, Color.Red);
canvas.SetPixel(4, 0, Color.Green);
canvas.SetPixel(0, 4, Color.Blue);
canvas.SetPixel(4, 4, Color.Yellow);
// When
console.Render(canvas);
// Then
console.Output.ShouldBe($"\u001b[106m \u001b[0m {Environment.NewLine} \u001b[100m \u001b[0m{Environment.NewLine}");
await Verifier.Verify(console.Output);
}
[Fact]
public void Render_Wider_Than_Terminal_Cannot_Be_Reduced_Further()
[Expectation("Render_Nested")]
public async Task Simple_Measure()
{
// Given
var console = new FakeAnsiConsole(ColorSystem.Standard, width: 10);
var canvas = new Canvas(width: 20, height: 2);
canvas.SetPixel(0, 0, Color.Aqua);
canvas.SetPixel(19, 1, Color.Grey);
var console = new FakeAnsiConsole(ColorSystem.Standard);
var panel = new Panel(new Canvas(width: 2, height: 2)
.SetPixel(0, 0, Color.Aqua)
.SetPixel(1, 1, Color.Grey));
// When
console.Render(canvas);
console.Render(panel);
// Then
console.Output.ShouldBe(string.Empty);
await Verifier.Verify(console.Output);
}
[Fact]
public void Render_Wider_Than_Terminal()
[Expectation("Render_NarrowTerminal")]
public async Task Should_Scale_Down_Canvas_Is_Bigger_Than_Terminal()
{
// Given
var console = new FakeAnsiConsole(ColorSystem.Standard, width: 10);
@@ -63,46 +87,40 @@ namespace Spectre.Console.Tests.Unit
console.Render(canvas);
// Then
var numNewlines = console.Output.Count(x => x == '\n');
// Small terminal shrinks the canvas
numNewlines.ShouldBe(expected: 2);
await Verifier.Verify(console.Output);
}
[Fact]
public void Render_Wider_Configured_With_Max_Width()
[Expectation("Render_MaxWidth")]
public async Task Should_Scale_Down_Canvas_If_MaxWidth_Is_Set()
{
// Given
var console = new FakeAnsiConsole(ColorSystem.Standard, width: 80);
var canvas = new Canvas(width: 20, height: 10) { MaxWidth = 10 };
canvas.SetPixel(0, 0, Color.Aqua);
canvas.SetPixel(19, 9, Color.Grey);
canvas.SetPixel(19, 9, Color.Aqua);
// When
console.Render(canvas);
// Then
var numNewlines = console.Output.Count(x => x == '\n');
// MaxWidth truncates the canvas
numNewlines.ShouldBe(expected: 5);
await Verifier.Verify(console.Output);
}
[Fact]
public void Simple_Measure()
public void Should_Not_Render_Canvas_If_Canvas_Cannot_Be_Scaled_Down()
{
// Given
var console = new FakeAnsiConsole(ColorSystem.Standard);
var canvas = new Canvas(width: 2, height: 2);
var console = new FakeAnsiConsole(ColorSystem.Standard, width: 10);
var canvas = new Canvas(width: 20, height: 2);
canvas.SetPixel(0, 0, Color.Aqua);
canvas.SetPixel(1, 1, Color.Grey);
canvas.SetPixel(19, 1, Color.Grey);
// When
var measurement = ((IRenderable)canvas).Measure(new RenderContext(Encoding.Unicode, false), 80);
console.Render(canvas);
// Then
measurement.Max.ShouldBe(expected: 4);
measurement.Min.ShouldBe(expected: 4);
console.Output.ShouldBeEmpty();
}
}
}

4
src/Spectre.Console/Widgets/Canvas.cs
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@@ -66,9 +66,11 @@ namespace Spectre.Console
/// <param name="x">The X coordinate for the pixel.</param>
/// <param name="y">The Y coordinate for the pixel.</param>
/// <param name="color">The pixel color.</param>
public void SetPixel(int x, int y, Color color)
/// <returns>The same <see cref="Canvas"/> instance so that multiple calls can be chained.</returns>
public Canvas SetPixel(int x, int y, Color color)
{
_pixels[x, y] = color;
return this;
}
/// <inheritdoc/>