diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleAnalytics4DataSourceItemFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleAnalytics4DataSourceItemFixture.cs
new file mode 100644
index 0000000..2c6620f
--- /dev/null
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleAnalytics4DataSourceItemFixture.cs
@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Reveal.Sdk.Dom.Core.Extensions;
+using Reveal.Sdk.Dom.Data;
+using Xunit;
+
+namespace Reveal.Sdk.Dom.Tests.Data.DataSourceItems
+{
+    public class GoogleAnalytics4DataSourceItemFixture
+    {
+        [Fact]
+        public void Constructor_SetsTitleAndDatasource_AsProvided()
+        {
+            // Arrange
+            var dataSource = new GoogleAnalytics4DataSource();
+            var title = "Test title";
+
+            // Act
+            var dataSourceItem = new GoogleAnalytics4DataSourceItem(title, dataSource);
+
+            // Assert
+            Assert.Equal(title, dataSourceItem.Title);
+            Assert.Equal(dataSource, dataSourceItem.DataSource);
+        }
+
+        [Fact]
+        public void AccountId_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleAnalytics4DataSource();
+            var dataSourceItem = new GoogleAnalytics4DataSourceItem("Test", dataSource);
+            var accountId = "TestAccountId";
+
+            // Act
+            dataSourceItem.AccountId = accountId;
+
+            // Assert
+            Assert.Equal(accountId, dataSourceItem.AccountId);
+            Assert.Equal(accountId, dataSourceItem.Properties.GetValue<string>("AccountId"));
+        }
+
+        [Fact]
+        public void PropertyId_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleAnalytics4DataSource();
+            var dataSourceItem = new GoogleAnalytics4DataSourceItem("Test", dataSource);
+            var propertyId = "TestPropertyId";
+
+            // Act
+            dataSourceItem.PropertyId = propertyId;
+
+            // Assert
+            Assert.Equal(propertyId, dataSourceItem.PropertyId);
+            Assert.Equal(propertyId, dataSourceItem.Properties.GetValue<string>("PropertyId"));
+        }
+    }
+}
diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleBigQueryDataSourceItemFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleBigQueryDataSourceItemFixture.cs
new file mode 100644
index 0000000..ea7e0b8
--- /dev/null
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleBigQueryDataSourceItemFixture.cs
@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Reveal.Sdk.Dom.Core.Extensions;
+using Reveal.Sdk.Dom.Data;
+using Xunit;
+
+namespace Reveal.Sdk.Dom.Tests.Data.DataSourceItems
+{
+    public class GoogleBigQueryDataSourceItemFixture
+    {
+        [Fact]
+        public void Constructor_SetsTitleAndDatasource_AsProvided()
+        {
+            // Arrange
+            var dataSource = new GoogleBigQueryDataSource();
+            var title = "Test title";
+
+            // Act
+            var dataSourceItem = new GoogleBigQueryDataSourceItem(title, dataSource);
+
+            // Assert
+            Assert.Equal(title, dataSourceItem.Title);
+            Assert.Equal(dataSource, dataSourceItem.DataSource);
+        }
+
+        [Fact]
+        public void DataSetId_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleBigQueryDataSource();
+            var dataSourceItem = new GoogleBigQueryDataSourceItem("Test", dataSource);
+            var datasetId = "DatasetId";
+
+            // Act
+            dataSourceItem.DataSetId = datasetId;
+
+            // Assert
+            Assert.Equal(datasetId, dataSourceItem.DataSetId);
+            Assert.Equal(datasetId, dataSourceItem.Properties.GetValue<string>("DataSetId"));
+        }
+
+        [Fact]
+        public void PropertyId_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleBigQueryDataSource();
+            var dataSourceItem = new GoogleBigQueryDataSourceItem("Test", dataSource);
+            var projectId = "TestPropertyId";
+
+            // Act
+            dataSourceItem.ProjectId = projectId;
+
+            // Assert
+            Assert.Equal(projectId, dataSourceItem.ProjectId);
+            Assert.Equal(projectId, dataSourceItem.Properties.GetValue<string>("ProjectId"));
+        }
+    }
+}
diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleDriveDataSourceItemFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleDriveDataSourceItemFixture.cs
new file mode 100644
index 0000000..1e0d645
--- /dev/null
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleDriveDataSourceItemFixture.cs
@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Reveal.Sdk.Dom.Core.Extensions;
+using Reveal.Sdk.Dom.Data;
+using Xunit;
+
+namespace Reveal.Sdk.Dom.Tests.Data.DataSourceItems
+{
+    public class GoogleDriveDataSourceItemFixture
+    {
+        [Fact]
+        public void Constructor_SetsTitleAndDatasource_AsProvided()
+        {
+            // Arrange
+            var dataSource = new GoogleDriveDataSource();
+            var title = "Test title";
+
+            // Act
+            var dataSourceItem = new GoogleDriveDataSourceItem(title, dataSource);
+
+            // Assert
+            Assert.Equal(title, dataSourceItem.Title);
+            Assert.Equal(dataSource, dataSourceItem.DataSource);
+        }
+
+        [Fact]
+        public void Identitifer_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleDriveDataSource();
+            var dataSourceItem = new GoogleDriveDataSourceItem("Test", dataSource);
+            var identifier = "IdentitiferTest";
+
+            // Act
+            dataSourceItem.Identitifer = identifier;
+
+            // Assert
+            Assert.Equal(identifier, dataSourceItem.Identitifer);
+            Assert.Equal(identifier, dataSourceItem.Properties.GetValue<string>("Identitifer"));
+        }
+    }
+}
diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleSheetsDataSourceItemFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleSheetsDataSourceItemFixture.cs
new file mode 100644
index 0000000..403e3d4
--- /dev/null
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSourceItems/GoogleSheetsDataSourceItemFixture.cs
@@ -0,0 +1,99 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Reveal.Sdk.Dom.Core.Extensions;
+using Reveal.Sdk.Dom.Data;
+using Xunit;
+
+namespace Reveal.Sdk.Dom.Tests.Data.DataSourceItems
+{
+    public class GoogleSheetsDataSourceItemFixture
+    {
+        [Fact]
+        public void Constructor_SetsTitleAndDatasource_AsProvided()
+        {
+            // Arrange
+            var dataSource = new GoogleSheetsDataSource();
+            var title = "Test title";
+
+            // Act
+            var dataSourceItem = new GoogleSheetsDataSourceItem(title, dataSource);
+
+            // Assert
+            Assert.Equal(title, dataSourceItem.Title);
+            Assert.Equal(dataSource, dataSourceItem.DataSource);
+        }
+
+        [Fact]
+        public void FirstRowContainsLabels_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleSheetsDataSource();
+            var dataSourceItem = new GoogleSheetsDataSourceItem("Test", dataSource);
+
+            // Act 1
+            dataSourceItem.FirstRowContainsLabels = true;
+
+            // Assert
+            Assert.True(dataSourceItem.FirstRowContainsLabels);
+            Assert.True(dataSourceItem.Properties.GetValue<bool>("FirstRowContainsLabels"));
+
+            // Act 1
+            dataSourceItem.FirstRowContainsLabels = false;
+
+            // Assert
+            Assert.False(dataSourceItem.FirstRowContainsLabels);
+            Assert.False(dataSourceItem.Properties.GetValue<bool>("FirstRowContainsLabels"));
+        }
+
+        [Fact]
+        public void NamedRange_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleSheetsDataSource();
+            var dataSourceItem = new GoogleSheetsDataSourceItem("Test", dataSource);
+            var namedRange = "NamedRangeTest";
+
+            // Act
+            dataSourceItem.NamedRange = namedRange;
+
+            // Assert
+            Assert.Equal(namedRange, dataSourceItem.NamedRange);
+            Assert.Equal(namedRange, dataSourceItem.Properties.GetValue<string>("NamedRange"));
+        }
+
+        [Fact]
+        public void PivotTable_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleSheetsDataSource();
+            var dataSourceItem = new GoogleSheetsDataSourceItem("Test", dataSource);
+            var pivotTable = "PivotTableTest";
+
+            // Act
+            dataSourceItem.PivotTable = pivotTable;
+
+            // Assert
+            Assert.Equal(pivotTable, dataSourceItem.PivotTable);
+            Assert.Equal(pivotTable, dataSourceItem.Properties.GetValue<string>("PivotTable"));
+        }
+
+        [Fact]
+        public void Sheet_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleSheetsDataSource();
+            var dataSourceItem = new GoogleSheetsDataSourceItem("Test", dataSource);
+            var sheet = "SheetTest";
+
+            // Act
+            dataSourceItem.Sheet = sheet;
+
+            // Assert
+            Assert.Equal(sheet, dataSourceItem.Sheet);
+            Assert.Equal(sheet, dataSourceItem.Properties.GetValue<string>("Sheet"));
+        }
+    }
+}
diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleAnalytics4DataSourceFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleAnalytics4DataSourceFixture.cs
new file mode 100644
index 0000000..76d7989
--- /dev/null
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleAnalytics4DataSourceFixture.cs
@@ -0,0 +1,18 @@
+using Reveal.Sdk.Dom.Data;
+using Xunit;
+
+namespace Reveal.Sdk.Dom.Tests.Data.DataSources
+{
+    public class GoogleAnalytics4DataSourceFixture
+    {
+        [Fact]
+        public void Constructor_SetProviderToGoogleAnalytics4_WhenConstructed()
+        {
+            // Act
+            var dataSource = new GoogleAnalytics4DataSource();
+
+            // Assert
+            Assert.Equal(DataSourceProvider.GoogleAnalytics4, dataSource.Provider);
+        }
+    }
+}
diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleBigQueryDataSourceFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleBigQueryDataSourceFixture.cs
new file mode 100644
index 0000000..49352f0
--- /dev/null
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleBigQueryDataSourceFixture.cs
@@ -0,0 +1,39 @@
+using Reveal.Sdk.Dom.Core.Extensions;
+using Reveal.Sdk.Dom.Data;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace Reveal.Sdk.Dom.Tests.Data.DataSources
+{
+    public class GoogleBigQueryDataSourceFixture
+    {
+        [Fact]
+        public void Constructor_SetProviderToGoogleBigQuery_WhenConstructed()
+        {
+            // Act
+            var dataSource = new GoogleBigQueryDataSource();
+
+            // Assert
+            Assert.Equal(DataSourceProvider.GoogleBigQuery, dataSource.Provider);
+        }
+
+        [Fact]
+        public void ProjectId_SaveValueAndProperties_WhenSet()
+        {
+            // Arrange
+            var dataSource = new GoogleBigQueryDataSource();
+            var projectId = "TestProjectId";
+
+            // Act
+            dataSource.ProjectId = projectId;
+
+            // Assert
+            Assert.Equal(projectId, dataSource.ProjectId);
+            Assert.Equal(projectId, dataSource.Properties.GetValue<string>("ProjectId"));
+        }
+    }
+}
diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleDriveDataSourceFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleDriveDataSourceFixture.cs
new file mode 100644
index 0000000..c07cf9d
--- /dev/null
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleDriveDataSourceFixture.cs
@@ -0,0 +1,24 @@
+using Reveal.Sdk.Dom.Core.Extensions;
+using Reveal.Sdk.Dom.Data;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace Reveal.Sdk.Dom.Tests.Data.DataSources
+{
+    public class GoogleDriveDataSourceFixture
+    {
+        [Fact]
+        public void Constructor_SetProviderToGoogleDrive_WhenConstructed()
+        {
+            // Act
+            var dataSource = new GoogleDriveDataSource();
+
+            // Assert
+            Assert.Equal(DataSourceProvider.GoogleDrive, dataSource.Provider);
+        }
+    }
+}
diff --git a/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleSheetsDataSourceFixture.cs b/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleSheetsDataSourceFixture.cs
new file mode 100644
index 0000000..d4d5f08
--- /dev/null
+++ b/src/Reveal.Sdk.Dom.Tests/Data/DataSources/GoogleSheetsDataSourceFixture.cs
@@ -0,0 +1,25 @@
+using Reveal.Sdk.Dom.Core.Extensions;
+using Reveal.Sdk.Dom.Data;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace Reveal.Sdk.Dom.Tests.Data.DataSources
+{
+    public class GoogleSheetsDataSourceFixture
+    {
+
+        [Fact]
+        public void Constructor_SetProviderToGoogleSheets_WhenConstructed()
+        {
+            // Act
+            var dataSource = new GoogleSheetsDataSource();
+
+            // Assert
+            Assert.Equal(DataSourceProvider.GoogleSheets, dataSource.Provider);
+        }
+    }
+}