chore: Skip unstable PlantUML tests (dotnet#9858)

* chore: skip unstable plantuml test

* chore: change svg content assertion logics

Author: filzrev

test/Docfx.MarkdigEngine.Extensions.Tests/PlantUmlTest.cs

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using FluentAssertions;
 using Xunit;
 
 namespace Docfx.MarkdigEngine.Tests;
@@ -18,14 +19,13 @@ public void TestRenderSvg_SequenceDiagram()
                      ```
                      """;
 
-        var expected = """
-                       <div class="lang-plantUml"><?xml version="1.0" encoding="us-ascii" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentStyleType="text/css" height="120px" preserveAspectRatio="none" style="width:113px;height:120px;background:#FFFFFF;" version="1.1" viewBox="0 0 113 120" width="113px" zoomAndPan="magnify"><defs/><g><line style="stroke:#181818;stroke-width:0.5;stroke-dasharray:5.0,5.0;" x1="26" x2="26" y1="36.2969" y2="85.4297"/><line style="stroke:#181818;stroke-width:0.5;stroke-dasharray:5.0,5.0;" x1="82" x2="82" y1="36.2969" y2="85.4297"/><rect fill="#E2E2F0" height="30.2969" rx="2.5" ry="2.5" style="stroke:#181818;stroke-width:0.5;" width="43" x="5" y="5"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacing" textLength="29" x="12" y="24.9951">Bob</text><rect fill="#E2E2F0" height="30.2969" rx="2.5" ry="2.5" style="stroke:#181818;stroke-width:0.5;" width="43" x="5" y="84.4297"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacing" textLength="29" x="12" y="104.4248">Bob</text><rect fill="#E2E2F0" height="30.2969" rx="2.5" ry="2.5" style="stroke:#181818;stroke-width:0.5;" width="49" x="58" y="5"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacing" textLength="35" x="65" y="24.9951">Alice</text><rect fill="#E2E2F0" height="30.2969" rx="2.5" ry="2.5" style="stroke:#181818;stroke-width:0.5;" width="49" x="58" y="84.4297"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacing" textLength="35" x="65" y="104.4248">Alice</text><polygon fill="#181818" points="70.5,63.4297,80.5,67.4297,70.5,71.4297,74.5,67.4297" style="stroke:#181818;stroke-width:1.0;"/><line style="stroke:#181818;stroke-width:1.0;" x1="26.5" x2="76.5" y1="67.4297" y2="67.4297"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="30" x="33.5" y="62.3638">hello</text><!--SRC=[SyfFKj2rKt3CoKnELR1Io4ZDoSa70000]--></g></svg></div>
-                       """;
-
-        TestUtility.VerifyMarkup(source, expected, plantUml: new()
+        var result = TestUtility.VerifyMarkup(source, html: null, plantUml: new()
         {
             OutputFormat = PlantUml.Net.OutputFormat.Svg,
             RemoteUrl = "https://www.plantuml.com/plantuml",
-        });
+        }).TrimEnd();
+
+        result.Should().StartWith("""<div class="lang-plantUml"><?xml version="1.0" encoding="us-ascii" standalone="no"?><svg""");
+        result.Should().EndWith("""hello</text><!--SRC=[SyfFKj2rKt3CoKnELR1Io4ZDoSa70000]--></g></svg></div>""");
     }
 }

test/Docfx.MarkdigEngine.Extensions.Tests/TestUtility.cs

@@ -10,7 +10,7 @@ namespace Docfx.MarkdigEngine.Tests;
 
 public static class TestUtility
 {
-    public static void VerifyMarkup(
+    public static string VerifyMarkup(
         string markdown,
         string html,
         string[] errors = null,
@@ -68,6 +68,7 @@ public static void VerifyMarkup(
             {
                 Assert.Equal(dependencies.OrderBy(_ => _), actualDependencies.OrderBy(_ => _));
             }
+            return actualHtml;
         }
 
         MarkdownContext.LogActionDelegate Log(string level)