fix extension convention checks

src/Verify.Tests/InnerVerifyChecksTests/Superset/.editorconfig

@@ -0,0 +1,14 @@
+root = true
+# EditorConfig: http://EditorConfig.org
+
+# top-most EditorConfig file
+
+# Verify settings
+[*.{received,verified}.{html,txt,xml}]
+charset = "utf-8-bom"
+end_of_line = lf
+indent_size = unset
+indent_style = unset
+insert_final_newline = false
+tab_width = unset
+trim_trailing_whitespace = false

src/Verify.Tests/InnerVerifyChecksTests/Superset/.gitattributes

@@ -0,0 +1,12 @@
+* text
+*.snk binary
+*.png binary
+*.bmp binary
+*.tif binary
+*.zip binary
+
+
+*.verified.txt text eol=lf working-tree-encoding=UTF-8
+*.verified.html text eol=lf working-tree-encoding=UTF-8
+*.verified.xml text eol=lf working-tree-encoding=UTF-8
+

src/Verify.Tests/InnerVerifyChecksTests/Superset/.gitignore

@@ -0,0 +1,10 @@
+*.suo
+*.user
+bin/
+obj/
+.vs/
+*.DotSettings.user
+.idea/
+*.received.*
+
+*.received/

src/Verify.Tests/InnerVerifyChecksTests/Superset/file.verified.html

@@ -0,0 +1 @@
+

src/Verify.Tests/InnerVerifyChecksTests/Superset/file.verified.txt

@@ -0,0 +1 @@
+

src/Verify.Tests/InnerVerifyChecksTests/Superset/project.csproj

@@ -0,0 +1,7 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>

src/Verify.Tests/InnerVerifyChecksTests/VerifyChecksTests.cs

@@ -16,6 +16,10 @@ static VerifyChecksTests()
         partialDirectory = GetDirectory("Partial");
     }
 
+    [Fact]
+    public Task Superset() =>
+        InnerVerifyChecks.Run(GetDirectory("Superset"));
+
     [Fact]
     public Task Valid() =>
         InnerVerifyChecks.Run(GetDirectory("Valid"));

src/Verify/ConventionCheck/InnerVerifyChecks.cs

@@ -78,10 +78,9 @@ internal static async Task CheckEditorConfig(string solutionDirectory, List<stri
         }
 
         path = Path.GetFullPath(path);
-        var text = await ReadText(path);
+        var lines = await ReadLines(path);
 
-        var headerLine = $"[*.{{received,verified}}.{{{StringPolyfill.Join(',', extensions)}}}]";
-        if (text.Contains(headerLine))
+        if (HasAllExtensions(extensions, lines))
         {
             return;
         }
@@ -93,7 +92,7 @@ internal static async Task CheckEditorConfig(string solutionDirectory, List<stri
               Recommended settings:
 
               # Verify
-              {headerLine}
+              {$"[*.{{received,verified}}.{{{StringPolyfill.Join(',', extensions)}}}]"}
               charset = "utf-8-bom"
               end_of_line = lf
               indent_size = unset
@@ -104,6 +103,26 @@ internal static async Task CheckEditorConfig(string solutionDirectory, List<stri
               """);
     }
 
+    static bool HasAllExtensions(List<string> extensions, string[] lines)
+    {
+        var line = lines.SingleOrDefault(_ => _.StartsWith("[*.{received,verified}."));
+        if (line == null)
+        {
+            return false;
+        }
+
+        var suffix = line[24..^2].Split(',');
+        foreach (var extension in extensions)
+        {
+            if (!suffix.Contains(extension))
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     internal static async Task CheckGitAttributes(string solutionDirectory, List<string> extensions)
     {
         var path = Path.Combine(solutionDirectory, ".gitattributes");