Fix MSTest 4.0 analyzer errors for Dependabot update

Co-authored-by: Malcolmnixon <1863707+Malcolmnixon@users.noreply.github.com>

Author: Copilot

test/DemaConsulting.DotnetToolWrapper.Tests/AssemblyInfo.cs

@@ -0,0 +1,4 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+// Enable test parallelization at the method level
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]

test/DemaConsulting.DotnetToolWrapper.Tests/IntegrationTests.cs

@@ -141,8 +141,8 @@ public void TestMissingConfigFile()
 
         // Assert
         Assert.AreEqual(1, exitCode, "Exit code should be 1 for missing config file");
-        Assert.IsTrue(output.Contains("Missing configuration file"), "Output should mention missing config file");
-        Assert.IsTrue(output.Contains("DotnetToolWrapper.json"), "Output should mention config file name");
+        Assert.Contains("Missing configuration file", output, "Output should mention missing config file");
+        Assert.Contains("DotnetToolWrapper.json", output, "Output should mention config file name");
     }
 
     /// <summary>
@@ -202,7 +202,7 @@ public void TestArgumentPassing()
 
         // Assert
         Assert.AreEqual(0, exitCode, "Exit code should be 0");
-        Assert.IsTrue(output.Contains(testText), $"Output should contain '{testText}'");
+        Assert.Contains(testText, output, $"Output should contain '{testText}'");
     }
 
     /// <summary>
@@ -228,7 +228,7 @@ public void TestUnsupportedTarget()
 
         // Assert
         Assert.AreEqual(1, exitCode, "Exit code should be 1 for unsupported target");
-        Assert.IsTrue(output.Contains("does not support"), "Output should mention unsupported target");
+        Assert.Contains("does not support", output, "Output should mention unsupported target");
     }
 
     /// <summary>
@@ -255,6 +255,6 @@ public void TestBadConfiguration()
 
         // Assert
         Assert.AreEqual(1, exitCode, "Exit code should be 1 for bad configuration");
-        Assert.IsTrue(output.Contains("Bad configuration"), "Output should mention bad configuration");
+        Assert.Contains("Bad configuration", output, "Output should mention bad configuration");
     }
 }

test/DemaConsulting.DotnetToolWrapper.Tests/ProgramTests.cs

@@ -51,9 +51,9 @@ public void TestGetTarget()
 
         // Assert
         Assert.IsNotNull(target);
-        Assert.IsTrue(target.Contains('-'), "Target should contain a hyphen");
+        Assert.Contains("-", target, "Target should contain a hyphen");
 
         var parts = target.Split('-');
-        Assert.AreEqual(2, parts.Length, "Target should have exactly two parts");
+        Assert.HasCount(2, parts, "Target should have exactly two parts");
     }
 }