test(core-tests): 规范字符串比较断言写法

- 优化 ContextAwareServiceExtensionsTests 中的字符串相等断言，显式使用 Ordinal 比较
- 优化 RollingFileAppenderTests 中的 StartsWith、EndsWith、排序比较与文件名判等写法，补充 Ordinal 比较并保持测试语义不变

GFramework.Core.Tests/Logging/RollingFileAppenderTests.cs

@@ -68,7 +68,7 @@ public class RollingFileAppenderTests
         }
 
         // 检查是否生成了多个文件
-        var files = Directory.GetFiles(_testDir, "*.log").OrderBy(f => f).ToArray();
+        var files = Directory.GetFiles(_testDir, "*.log").OrderBy(f => f, System.StringComparer.Ordinal).ToArray();
         Assert.That(files.Length, Is.GreaterThan(1));
     }
 
@@ -108,13 +108,21 @@ public class RollingFileAppenderTests
             appender.Flush();
         }
 
-        var files = Directory.GetFiles(_testDir, "*.log").Select(Path.GetFileName).OrderBy(f => f).ToArray();
+        var files = Directory.GetFiles(_testDir, "*.log")
+            .Select(static path => Path.GetFileName(path) ?? string.Empty)
+            .OrderBy(f => f, System.StringComparer.Ordinal)
+            .ToArray();
 
         // 应该有 app.log, app.1.log, app.2.log 等
         Assert.That(files, Does.Contain("app.log"));
         if (files.Length > 1)
         {
-            Assert.That(files.Any(f => f.StartsWith("app.") && f.EndsWith(".log") && f != "app.log"), Is.True);
+            Assert.That(
+                files.Any(f =>
+                    f.StartsWith("app.", System.StringComparison.Ordinal) &&
+                    f.EndsWith(".log", System.StringComparison.Ordinal) &&
+                    !string.Equals(f, "app.log", System.StringComparison.Ordinal)),
+                Is.True);
         }
     }
 
@@ -163,4 +171,4 @@ public class RollingFileAppenderTests
         var content = File.ReadAllText(_testFilePath);
         Assert.That(content, Does.Contain("Test message"));
     }
-}
+}

GFramework.Core.Tests/Rule/ContextAwareServiceExtensionsTests.cs

@@ -181,8 +181,8 @@ public class ContextAwareServiceExtensionsTests
 
         // Assert
         Assert.That(results, Has.Count.GreaterThanOrEqualTo(2));
-        Assert.That(results.Any(s => s is TestSystem ts && ts.Name == "System1"), Is.True);
-        Assert.That(results.Any(s => s is TestSystem ts && ts.Name == "System2"), Is.True);
+        Assert.That(results.Any(s => s is TestSystem ts && string.Equals(ts.Name, "System1", System.StringComparison.Ordinal)), Is.True);
+        Assert.That(results.Any(s => s is TestSystem ts && string.Equals(ts.Name, "System2", System.StringComparison.Ordinal)), Is.True);
     }
 
     [Test]
@@ -200,8 +200,8 @@ public class ContextAwareServiceExtensionsTests
 
         // Assert
         Assert.That(results, Has.Count.EqualTo(2));
-        Assert.That(results.Any(m => m.Name == "Model1"), Is.True);
-        Assert.That(results.Any(m => m.Name == "Model2"), Is.True);
+        Assert.That(results.Any(m => string.Equals(m.Name, "Model1", System.StringComparison.Ordinal)), Is.True);
+        Assert.That(results.Any(m => string.Equals(m.Name, "Model2", System.StringComparison.Ordinal)), Is.True);
     }
 
     [Test]
@@ -219,8 +219,8 @@ public class ContextAwareServiceExtensionsTests
 
         // Assert
         Assert.That(results, Has.Count.EqualTo(2));
-        Assert.That(results.Any(u => u.Name == "Utility1"), Is.True);
-        Assert.That(results.Any(u => u.Name == "Utility2"), Is.True);
+        Assert.That(results.Any(u => string.Equals(u.Name, "Utility1", System.StringComparison.Ordinal)), Is.True);
+        Assert.That(results.Any(u => string.Equals(u.Name, "Utility2", System.StringComparison.Ordinal)), Is.True);
     }
 
     [Test]
@@ -304,4 +304,4 @@ public class ContextAwareServiceExtensionsTests
     private class TestContextAware : ContextAwareBase
     {
     }
-}
+}