From ea865534579e1f95ada040d731b1f8c655ad326c Mon Sep 17 00:00:00 2001
From: Ben Olden-Cooligan <ben.cyanfish@gmail.com>
Date: Mon, 5 Aug 2024 15:53:52 -0700
Subject: [PATCH] Test fonts

---
 NAPS2.Sdk.Tests/Asserts/PdfAsserts.cs | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/NAPS2.Sdk.Tests/Asserts/PdfAsserts.cs b/NAPS2.Sdk.Tests/Asserts/PdfAsserts.cs
index 17c5d67ce1..ed42f5e4fe 100644
--- a/NAPS2.Sdk.Tests/Asserts/PdfAsserts.cs
+++ b/NAPS2.Sdk.Tests/Asserts/PdfAsserts.cs
@@ -1,9 +1,11 @@
-using System.Text.RegularExpressions;
+using System.Text;
+using System.Text.RegularExpressions;
 using Codeuctivity;
 using NAPS2.Pdf;
 using NAPS2.Pdf.Pdfium;
 using PdfSharpCore.Pdf.IO;
 using PdfSharpCore.Pdf.Security;
+using PdfSharpCore.Utils;
 using Xunit;
 using Xunit.Sdk;
 
@@ -42,37 +44,42 @@ public static async Task AssertCompliant(string profile, string filePath)
 
     public static void AssertContainsTextOnce(string text, string filePath)
     {
-        var value = CountText(text, filePath);
+        var value = CountText(text, filePath, out var actualText);
         if (value != 1)
         {
-            throw new XunitException($"Unexpected count for \"{text}\": expected {1}, got {value}");
+            throw new XunitException(
+                $"Unexpected count for \"{text}\": expected {1}, got {value}; installed fonts {string.Join(",", FontResolver.InstalledFonts.OrderBy(x => x.Key))}");
         }
     }
 
     public static void AssertDoesNotContainText(string text, string filePath)
     {
-        var value = CountText(text, filePath);
+        var value = CountText(text, filePath, out var actualText);
         if (value != 0)
         {
-            throw new XunitException($"Unexpected count for \"{text}\": expected {0}, got {value}");
+            throw new XunitException(
+                $"Unexpected count for \"{text}\": expected {0}, got {value}; actual text {actualText}");
         }
     }
 
-    private static int CountText(string text, string filePath)
+    private static int CountText(string text, string filePath, out string actualText)
     {
         Assert.True(File.Exists(filePath));
         int count = 0;
+        var fullText = new StringBuilder();
         foreach (var pageText in new PdfiumPdfReader().ReadTextByPage(filePath))
         {
             int startIndex = 0;
             int index;
             var normalized = Regex.Replace(pageText, "\\s+", " ");
+            fullText.Append(normalized);
             while ((index = normalized.IndexOf(text, startIndex, StringComparison.InvariantCulture)) != -1)
             {
                 count++;
                 startIndex = index + 1;
             }
         }
+        actualText = fullText.ToString();
         return count;
     }