Disabled parallelism and made the switch explicit

Author: droyad

src/Tests/AssemblyInfo.cs

@@ -0,0 +1,2 @@
+// The tests use global switches to control Npgsql behaviour so they can't run in parallel
+[assembly: Xunit.CollectionBehavior(DisableTestParallelization = true)]

src/Tests/DatabaseSupportTests.cs

@@ -1,4 +1,5 @@
 #if !NETCORE
+using System;
 using DbUp.Builder;
 using DbUp.Tests.Common;
 
@@ -8,6 +9,7 @@ public class DatabaseSupportTests : DatabaseSupportTestsBase
 {
     public DatabaseSupportTests() : base()
     {
+        AppContext.SetSwitch("Npgsql.EnableSqlRewriting", true);
     }
 
     protected override UpgradeEngineBuilder DeployTo(SupportedDatabases to)

src/Tests/PostgresTableJournalTests.cs

@@ -11,33 +11,7 @@ namespace DbUp.Postgresql.Tests;
 
 public class PostgresTableJournalTests : IDisposable
 {
-    [Fact]
-    public void uses_named_parameters_when_sql_rewriting_not_specified()
-    {
-        // Arrange
-        var dbConnection = Substitute.For<IDbConnection>();
-        var connectionManager = new TestConnectionManager(dbConnection, true);
-        var command = Substitute.For<IDbCommand>();
-        var param1 = Substitute.For<IDbDataParameter>();
-        var param2 = Substitute.For<IDbDataParameter>();
-        dbConnection.CreateCommand().Returns(command);
-        command.CreateParameter().Returns(param1, param2);
-        command.ExecuteScalar().Returns(x => 0);
-        var consoleUpgradeLog = new ConsoleUpgradeLog();
-        var journal = new PostgresqlTableJournal(() => connectionManager, () => consoleUpgradeLog, "public", "SchemaVersions");
-
-        // Act
-        journal.StoreExecutedScript(new SqlScript("test", "select 1"), () => command);
-
-        // Assert
-        command.Received(2).CreateParameter();
-        param1.ParameterName.ShouldBe("scriptName");
-        param2.ParameterName.ShouldBe("applied");
-        command.CommandText.ShouldBe("""insert into "public"."SchemaVersions" (ScriptName, Applied) values (@scriptName, @applied)""");
-        command.Received().ExecuteNonQuery();
-    }
-
-    [Fact]
+  [Fact]
     public void uses_positional_parameters_when_sql_rewriting_disabled()
     {
         AppContext.SetSwitch("Npgsql.EnableSqlRewriting", false);