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d95169d8fa
* Move all unit tests to Engine/Tests * Fix Margin.EdgeSubtract * Fix Capsule.Contains * EnvironmentVariables.Remove if it's null * Fixed ray trace never returning startedsolid * Fix HistoryList.Navigate on empty list * Fix GameObject.WorldPosition accepting NaNs * Fix flex: initial expanding to the wrong grow/shrink * Translation.TryConvert shouldn't throw on invalid enum strings * Skip sound file tests on machines with no audio device
87 lines
2.6 KiB
C#
87 lines
2.6 KiB
C#
using System;
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using Topten.RichTextKit;
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namespace UITests.Text;
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/// <summary>
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/// Rendering-level coverage for text-align: justify, exercised directly through RichTextKit's
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/// layout so we verify words are actually spread to fill the line (not just that the style parses).
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/// </summary>
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[TestClass]
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public class JustificationTest
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{
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const float MaxWidth = 140;
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/// <summary>
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/// Lays out a short multi-word string that wraps to several lines under the given alignment.
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/// </summary>
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static TextBlock Build( TextAlignment alignment )
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{
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var tb = new TextBlock();
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tb.MaxWidth = MaxWidth;
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tb.Alignment = alignment;
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var style = new Style { FontFamily = "Arial", FontSize = 16 };
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tb.AddText( "aa bb cc dd ee ff gg hh ii jj kk ll mm nn oo pp qq rr ss tt uu vv", style );
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tb.Layout();
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return tb;
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}
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/// <summary>
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/// The right edge of a line's visible (non-trailing-whitespace) content.
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/// </summary>
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static float LineRight( TextLine line )
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{
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float right = 0;
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foreach ( var run in line.Runs )
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{
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if ( run.RunKind != FontRunKind.Normal )
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continue;
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right = MathF.Max( right, run.XCoord + run.Width );
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}
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return right;
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}
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/// <summary>
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/// A justified line (other than the last) should be stretched to fill the available width.
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/// </summary>
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[TestMethod]
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public void JustifyFillsFirstLine()
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{
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var tb = Build( TextAlignment.Justify );
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Assert.IsTrue( tb.Lines.Count >= 2, $"expected the text to wrap, got {tb.Lines.Count} line(s)" );
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Assert.IsTrue( LineRight( tb.Lines[0] ) >= MaxWidth - 1f, $"justified line only reached {LineRight( tb.Lines[0] )} of {MaxWidth}" );
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}
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/// <summary>
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/// The same line is wider when justified than when left-aligned (proving the spacing was added,
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/// not that the text just happened to fit).
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/// </summary>
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[TestMethod]
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public void JustifyWidensVersusLeft()
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{
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var justified = Build( TextAlignment.Justify );
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var left = Build( TextAlignment.Left );
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Assert.IsTrue( LineRight( justified.Lines[0] ) > LineRight( left.Lines[0] ) + 1f,
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$"justified {LineRight( justified.Lines[0] )} vs left {LineRight( left.Lines[0] )}" );
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}
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/// <summary>
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/// The last line of the block is not justified - it stays the same width as when left-aligned.
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/// </summary>
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[TestMethod]
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public void JustifyLeavesLastLineRagged()
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{
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var justified = Build( TextAlignment.Justify );
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var left = Build( TextAlignment.Left );
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int last = justified.Lines.Count - 1;
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Assert.AreEqual( LineRight( left.Lines[last] ), LineRight( justified.Lines[last] ), 0.5f );
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Assert.IsTrue( LineRight( justified.Lines[last] ) < MaxWidth - 1f, "last line should not fill the width" );
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}
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}
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