Added more tests

src/Migrator.Tests/Providers/Generic/Generic_AddPrimaryKey.cs

@@ -44,4 +44,28 @@ public void AddPrimaryKey_IdentityColumnWithData_Success()
         Assert.That(list[0].Item1, Is.EqualTo(1));
         Assert.That(list[1].Item1, Is.EqualTo(2));
     }
+
+    [Test]
+    public void AddPrimaryKey_AddPrimaryKey_ShouldStillBeNotNull()
+    {
+        // Arrange
+        const string tableName = "TestTable";
+        const string columnName1 = "TestColumn1";
+        const string columnName2 = "TestColumn2";
+
+        Provider.AddTable(tableName,
+            new Column(columnName1, DbType.Int32, property: ColumnProperty.NotNull),
+            new Column(columnName2, DbType.DateTime, property: ColumnProperty.NotNull)
+        );
+
+        // Act
+        Provider.AddPrimaryKey(name: "MyPkName", table: tableName, columnName1);
+
+        // Assert
+        var column1 = Provider.GetColumnByName(table: tableName, column: columnName1);
+        var column2 = Provider.GetColumnByName(table: tableName, column: columnName2);
+
+        Assert.That(column1.ColumnProperty.HasFlag(ColumnProperty.NotNull), Is.True);
+        Assert.That(column2.ColumnProperty.HasFlag(ColumnProperty.NotNull), Is.True);
+    }
 }

src/Migrator.Tests/Providers/Generic/Generic_ChangeColumnTestsBase.cs

@@ -1,7 +1,33 @@
+using System.Data;
+using DotNetProjects.Migrator.Framework;
 using Migrator.Tests.Providers.Base;
+using NUnit.Framework;
 
 namespace Migrator.Tests.Providers.Generic;
 
 public abstract class Generic_ChangeColumnTestsBase : TransformationProviderBase
 {
+    [Test]
+    public void ChangeColumn_NotNullAndNullToNotNull_Success()
+    {
+        // Arrange
+        var tableName = "TableName";
+        var column1Name = "Column1";
+        var column2Name = "Column2";
+
+        // Act
+        Provider.AddTable(tableName,
+            new Column(column1Name, DbType.DateTime, ColumnProperty.NotNull),
+            new Column(column2Name, DbType.DateTime, ColumnProperty.Null)
+        );
+
+        // Assert
+        Provider.ChangeColumn(tableName, new Column(column1Name, DbType.DateTime2, ColumnProperty.NotNull));
+        Provider.ChangeColumn(tableName, new Column(column2Name, DbType.DateTime2, ColumnProperty.NotNull));
+        var column1 = Provider.GetColumnByName(tableName, column1Name);
+        var column2 = Provider.GetColumnByName(tableName, column2Name);
+
+        Assert.That(column1.ColumnProperty.HasFlag(ColumnProperty.NotNull), Is.True);
+        Assert.That(column2.ColumnProperty.HasFlag(ColumnProperty.NotNull), Is.True);
+    }
 }

src/Migrator.Tests/Providers/OracleProvider/OracleTransformationProvider_AddColumnTests.cs

@@ -0,0 +1,43 @@
+using System.Data;
+using System.Threading.Tasks;
+using DotNetProjects.Migrator.Framework;
+using Migrator.Tests.Providers.Base;
+using NUnit.Framework;
+
+namespace Migrator.Tests.Providers.OracleProvider;
+
+[TestFixture]
+[Category("Oracle")]
+public class OracleTransformationProvider_AddColumn_Tests : TransformationProviderBase
+{
+    [SetUp]
+    public async Task SetUpAsync()
+    {
+        await BeginOracleTransactionAsync();
+    }
+
+    [Test]
+    public void AddTable_NotNull_OtherColumnStillNotNull()
+    {
+        // Arrange
+        var tableName = "TableName";
+        var column1Name = "Column1";
+        var column2Name = "Column2";
+
+
+        Provider.AddTable(tableName,
+            new Column(column1Name, DbType.Int32, ColumnProperty.NotNull)
+        );
+
+        // Act
+        Provider.AddColumn(table: tableName, column: new Column(column2Name, DbType.DateTime, ColumnProperty.NotNull));
+
+
+        // Assert
+        var column1 = Provider.GetColumnByName(tableName, column1Name);
+        var column2 = Provider.GetColumnByName(tableName, column2Name);
+
+        Assert.That(column1.ColumnProperty.HasFlag(ColumnProperty.NotNull), Is.True);
+        Assert.That(column2.ColumnProperty.HasFlag(ColumnProperty.NotNull), Is.True);
+    }
+}

src/Migrator.Tests/Providers/OracleProvider/OracleTransformationProvider_AddTable_Tests.cs

@@ -27,4 +27,22 @@ public void AddTableWithCompoundPrimaryKey()
         Assert.That(Provider.TableExists("Test"), Is.True, "Table doesn't exist");
         Assert.That(Provider.PrimaryKeyExists("Test", "PK_Test"), Is.True, "Constraint doesn't exist");
     }
+
+    [Test]
+    public void AddTable_NotNull_Success()
+    {
+        // Arrange
+        var tableName = "TableName";
+        var column1Name = "Column1";
+
+        // Act
+        Provider.AddTable(tableName,
+            new Column(column1Name, DbType.Int32, ColumnProperty.NotNull)
+        );
+
+        // Assert
+        var column1 = Provider.GetColumnByName(tableName, column1Name);
+
+        Assert.That(column1.ColumnProperty.HasFlag(ColumnProperty.NotNull), Is.True);
+    }
 }