diff --git a/js/pptx/smoke/api_master/add_layout.js b/js/pptx/smoke/api_master/add_layout.js
new file mode 100644
index 00000000..bff6043a
--- /dev/null
+++ b/js/pptx/smoke/api_master/add_layout.js
@@ -0,0 +1,21 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+// oPresentation.GetMaster(0).Delete();
+oSlide.RemoveAllObjects();
+
+var oMaster = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster);
+var nCountBefore = oMaster.GetLayoutsCount();
+var oLayout = Api.CreateLayout();
+oMaster.AddLayout(0, oLayout);
+var nCountAfter = oMaster.GetLayoutsCount();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Layouts before: ' + nCountBefore + ', after: ' + nCountAfter);
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "AddLayout.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/add_object.js b/js/pptx/smoke/api_master/add_object.js
new file mode 100644
index 00000000..6e9979b4
--- /dev/null
+++ b/js/pptx/smoke/api_master/add_object.js
@@ -0,0 +1,24 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+// oPresentation.GetMaster(0).Delete();
+oSlide.RemoveAllObjects();
+var oMaster = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster);
+
+var nCountBefore = oMaster.GetAllShapes().length;
+var oFill = Api.CreateSolidFill(Api.CreateRGBColor(255, 111, 61));
+var oStroke = Api.CreateStroke(0, Api.CreateNoFill());
+var oShape = Api.CreateShape("flowChartMagneticTape", 300 * 36000, 130 * 36000, oFill, oStroke);
+oShape.SetPosition(608400, 1267200);
+oShape.SetSize(300 * 36000, 130 * 36000);
+oMaster.AddObject(oShape);
+var nCountAfter = oMaster.GetAllShapes().length;
+
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+var oRun = Api.CreateRun();
+oRun.AddText('before: ' + nCountBefore + ', after: ' + nCountAfter);
+oParagraph.AddElement(oRun);
+builder.SaveFile("pptx", "AddObject.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/clear_background.js b/js/pptx/smoke/api_master/clear_background.js
new file mode 100644
index 00000000..664b0e5f
--- /dev/null
+++ b/js/pptx/smoke/api_master/clear_background.js
@@ -0,0 +1,12 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+var oMaster = oPresentation.GetMaster(0);
+var oRGBColor = Api.CreateRGBColor(255, 213, 191);
+var oGs1 = Api.CreateGradientStop(oRGBColor, 0);
+var oGs2 = Api.CreateGradientStop(Api.CreateRGBColor(255, 111, 61), 100000);
+var oFill = Api.CreateRadialGradientFill([oGs1, oGs2]);
+oMaster.SetBackground(oFill);
+oMaster.ClearBackground();
+builder.SaveFile("pptx", "ClearBackground.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/copy.js b/js/pptx/smoke/api_master/copy.js
new file mode 100644
index 00000000..f3ee0bf4
--- /dev/null
+++ b/js/pptx/smoke/api_master/copy.js
@@ -0,0 +1,19 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster = oPresentation.GetMaster(0);
+
+var nCountBefore = oPresentation.GetMastersCount();
+var oCopyMaster = oMaster.Copy();
+oPresentation.AddMaster(1, oCopyMaster);
+var nCountAfter = oPresentation.GetMastersCount();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Masters before: ' + nCountBefore + ', after: ' + nCountAfter);
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "Copy.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/delete.js b/js/pptx/smoke/api_master/delete.js
new file mode 100644
index 00000000..7afe5159
--- /dev/null
+++ b/js/pptx/smoke/api_master/delete.js
@@ -0,0 +1,20 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster1 = oPresentation.GetMaster(0);
+
+var oMaster2 = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster2);
+var nCountBefore = oPresentation.GetMastersCount();
+oMaster2.Delete();
+var nCountAfter = oPresentation.GetMastersCount();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Masters before: ' + nCountBefore + ', after: ' + nCountAfter);
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "Delete.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/duplicate.js b/js/pptx/smoke/api_master/duplicate.js
new file mode 100644
index 00000000..0bd946ab
--- /dev/null
+++ b/js/pptx/smoke/api_master/duplicate.js
@@ -0,0 +1,18 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster = oPresentation.GetMaster(0);
+
+var nCountBefore = oPresentation.GetMastersCount();
+oMaster.Duplicate(1);
+var nCountAfter = oPresentation.GetMastersCount();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Masters before: ' + nCountBefore + ', after: ' + nCountAfter);
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "Duplicate.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_all_charts.js b/js/pptx/smoke/api_master/get_all_charts.js
new file mode 100644
index 00000000..3c9ab796
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_all_charts.js
@@ -0,0 +1,30 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+// oPresentation.GetMaster(0).Delete();
+oSlide.RemoveAllObjects();
+var oMaster = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster);
+
+var oChart = Api.CreateChart("bar3D", [
+    [200, 240, 280],
+    [250, 260, 280]
+], ["Projected Revenue", "Estimated Costs"], [2014, 2015, 2016], 4051300, 2347595, 24);
+oChart.SetVerAxisTitle("USD In Hundred Thousands", 10);
+oChart.SetHorAxisTitle("Year", 11);
+oChart.SetLegendPos("bottom");
+oChart.SetShowDataLabels(false, false, true, false);
+oChart.SetTitle("Financial Overview", 13);
+oChart.SetSize(300 * 36000, 130 * 36000);
+oChart.SetPosition(608400, 1267200);
+oMaster.AddObject(oChart);
+var aCharts = oMaster.GetAllCharts();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Charts count: ' + aCharts.length + ', type: ' + aCharts[0].GetClassType());
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetAllCharts.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_all_drawings.js b/js/pptx/smoke/api_master/get_all_drawings.js
new file mode 100644
index 00000000..11cfdf27
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_all_drawings.js
@@ -0,0 +1,30 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+// oPresentation.GetMaster(0).Delete();
+oSlide.RemoveAllObjects();
+var oMaster = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster);
+
+var oImage = Api.CreateImage("https://api.onlyoffice.com/content/img/docbuilder/examples/coordinate_aspects.png", 60 * 36000, 35 * 36000);
+oMaster.AddObject(oImage);
+var oOleObject = Api.CreateOleObject("https://i.ytimg.com/vi_webp/SKGz4pmnpgY/sddefault.webp", 130 * 36000, 90 * 36000, "https://youtu.be/SKGz4pmnpgY", "asc.{38E022EA-AD92-45FC-B22B-49DF39746DB4}");
+oOleObject.SetSize(200 * 36000, 130 * 36000);
+oOleObject.SetPosition(70 * 36000, 30 * 36000);
+oMaster.AddObject(oOleObject);
+var aDrawings = oMaster.GetAllDrawings();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Drawings count: ' + aDrawings.length);
+oParagraph.AddLineBreak();
+var aDrawingsTypes = []
+for (var i=0; i<aDrawings.length; i++){
+    aDrawingsTypes.push(aDrawings[i].GetClassType());
+}
+oParagraph.AddText('Types: ' + aDrawingsTypes.join(', '));
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetAllDrawings.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_all_images.js b/js/pptx/smoke/api_master/get_all_images.js
new file mode 100644
index 00000000..40e3267e
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_all_images.js
@@ -0,0 +1,20 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+// oPresentation.GetMaster(0).Delete();
+oSlide.RemoveAllObjects();
+var oMaster = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster);
+
+var oImage = Api.CreateImage("https://api.onlyoffice.com/content/img/docbuilder/examples/coordinate_aspects.png", 60 * 36000, 35 * 36000);
+oMaster.AddObject(oImage);
+var aImages = oMaster.GetAllImages();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Images count: ' + aImages.length + ', type: ' + aImages[0].GetClassType());
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetAllImages.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_all_ole_objects.js b/js/pptx/smoke/api_master/get_all_ole_objects.js
new file mode 100644
index 00000000..5d2fdda0
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_all_ole_objects.js
@@ -0,0 +1,22 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+// oPresentation.GetMaster(0).Delete();
+oSlide.RemoveAllObjects();
+var oMaster = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster);
+
+var oOleObject = Api.CreateOleObject("https://i.ytimg.com/vi_webp/SKGz4pmnpgY/sddefault.webp", 130 * 36000, 90 * 36000, "https://youtu.be/SKGz4pmnpgY", "asc.{38E022EA-AD92-45FC-B22B-49DF39746DB4}");
+oOleObject.SetSize(200 * 36000, 130 * 36000);
+oOleObject.SetPosition(70 * 36000, 30 * 36000);
+oMaster.AddObject(oOleObject);
+var aOleObjects = oMaster.GetAllOleObjects();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('OleObjects count: ' + aOleObjects.length + ', type: ' + aOleObjects[0].GetClassType());
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetAllOleObjects.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_all_shapes.js b/js/pptx/smoke/api_master/get_all_shapes.js
new file mode 100644
index 00000000..eba3900b
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_all_shapes.js
@@ -0,0 +1,24 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+// oPresentation.GetMaster(0).Delete();
+oSlide.RemoveAllObjects();
+var oMaster = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster);
+
+var oFill = Api.CreateSolidFill(Api.CreateRGBColor(255, 111, 61));
+var oStroke = Api.CreateStroke(0, Api.CreateNoFill());
+var oShape = Api.CreateShape("flowChartMagneticTape", 300 * 36000, 130 * 36000, oFill, oStroke);
+oShape.SetPosition(608400, 1267200);
+oShape.SetSize(300 * 36000, 130 * 36000);
+oMaster.AddObject(oShape);
+var aShapes = oMaster.GetAllShapes();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Shapes count: ' + aShapes.length + ', type: ' + aShapes[0].GetClassType());
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetAllShapes.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_class_type.js b/js/pptx/smoke/api_master/get_class_type.js
new file mode 100644
index 00000000..36f30abb
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_class_type.js
@@ -0,0 +1,15 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster = oPresentation.GetMaster(0);
+var sType = oMaster.GetClassType();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('GetClassType type: ' + sType);
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetClassType.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_layout.js b/js/pptx/smoke/api_master/get_layout.js
new file mode 100644
index 00000000..fb4bdcae
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_layout.js
@@ -0,0 +1,14 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster = oPresentation.GetMaster(0);
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('GetLayout layout type: ' + oMaster.GetLayout(0).GetClassType());
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetLayout.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_layouts_count.js b/js/pptx/smoke/api_master/get_layouts_count.js
new file mode 100644
index 00000000..0b4eda90
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_layouts_count.js
@@ -0,0 +1,14 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster = oPresentation.GetMaster(0);
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Layouts count: ' + oMaster.GetLayoutsCount());
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetLayoutsCount.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/get_theme.js b/js/pptx/smoke/api_master/get_theme.js
new file mode 100644
index 00000000..c7dea435
--- /dev/null
+++ b/js/pptx/smoke/api_master/get_theme.js
@@ -0,0 +1,15 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+var oMaster = oPresentation.GetMaster(0);
+oSlide.RemoveAllObjects();
+var oTheme = oMaster.GetTheme();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('GetTheme type: ' + oTheme.GetClassType());
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "GetTheme.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/remove_layout.js b/js/pptx/smoke/api_master/remove_layout.js
new file mode 100644
index 00000000..bd005952
--- /dev/null
+++ b/js/pptx/smoke/api_master/remove_layout.js
@@ -0,0 +1,18 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster = oPresentation.GetMaster(0);
+
+var nCountBefore = oMaster.GetLayoutsCount();
+oMaster.RemoveLayout(3, 7);
+var nCountAfter = oMaster.GetLayoutsCount();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Layouts count before: ' + nCountBefore + ' after: ' + nCountAfter);
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "RemoveLayout.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/remove_object.js b/js/pptx/smoke/api_master/remove_object.js
new file mode 100644
index 00000000..97defcf2
--- /dev/null
+++ b/js/pptx/smoke/api_master/remove_object.js
@@ -0,0 +1,30 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+// oPresentation.GetMaster(0).Delete();
+oSlide.RemoveAllObjects();
+var oMaster = Api.CreateMaster();
+oPresentation.AddMaster(1, oMaster);
+
+var oFill = Api.CreateSolidFill(Api.CreateRGBColor(255, 111, 61));
+var oStroke = Api.CreateStroke(0, Api.CreateNoFill());
+var oShape = Api.CreateShape("flowChartMagneticTape", 300 * 36000, 130 * 36000, oFill, oStroke);
+oShape.SetPosition(608400, 1267200);
+oShape.SetSize(300 * 36000, 130 * 36000);
+oMaster.AddObject(oShape);
+var oImage = Api.CreateImage("https://api.onlyoffice.com/content/img/docbuilder/examples/coordinate_aspects.png", 60 * 36000, 35 * 36000);
+oMaster.AddObject(oImage);
+
+oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('Drawings count: ' + oMaster.GetAllDrawings().length);
+oParagraph.AddLineBreak();
+oMaster.RemoveObject(0, 1);
+oParagraph.AddText('Drawings count: ' + oMaster.GetAllDrawings().length);
+oParagraph.AddLineBreak();
+oParagraph.AddText('Shapes: ' + oMaster.GetAllShapes().length + ', images: ' + oMaster.GetAllImages().length);
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "RemoveObject.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/set_background.js b/js/pptx/smoke/api_master/set_background.js
new file mode 100644
index 00000000..d34641c5
--- /dev/null
+++ b/js/pptx/smoke/api_master/set_background.js
@@ -0,0 +1,11 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+var oMaster = oPresentation.GetMaster(0);
+var oRGBColor = Api.CreateRGBColor(255, 213, 191);
+var oGs1 = Api.CreateGradientStop(oRGBColor, 0);
+var oGs2 = Api.CreateGradientStop(Api.CreateRGBColor(255, 111, 61), 100000);
+var oFill = Api.CreateRadialGradientFill([oGs1, oGs2]);
+oMaster.SetBackground(oFill);
+builder.SaveFile("pptx", "SetBackground.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/set_theme.js b/js/pptx/smoke/api_master/set_theme.js
new file mode 100644
index 00000000..a854a05c
--- /dev/null
+++ b/js/pptx/smoke/api_master/set_theme.js
@@ -0,0 +1,21 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster = oPresentation.GetMaster(0);
+var oTheme = oMaster.GetTheme();
+var oFonts = oTheme.GetFontScheme();
+oFonts.SetFonts("Times New Roman");
+oTheme.SetFontScheme(oFonts);
+var result = oMaster.SetTheme(oTheme)
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('SetTheme result: ' + result);
+oParagraph.AddLineBreak();
+oParagraph.AddText('Fonts: ' + oTheme.GetFontScheme().ToJSON());
+oParagraph.SetHighlight("black");
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "SetTheme.pptx");
+builder.CloseFile();
diff --git a/js/pptx/smoke/api_master/to_json.js b/js/pptx/smoke/api_master/to_json.js
new file mode 100644
index 00000000..3a83c0a4
--- /dev/null
+++ b/js/pptx/smoke/api_master/to_json.js
@@ -0,0 +1,16 @@
+builder.CreateFile("pptx");
+var oPresentation = Api.GetPresentation();
+var oSlide = oPresentation.GetSlideByIndex(0);
+oSlide.RemoveAllObjects();
+var oMaster = oPresentation.GetMaster(0);
+var json = oMaster.ToJSON(true);
+var oMasterFromJSON = Api.FromJSON(json);
+var sType = oMasterFromJSON.GetClassType();
+
+var oShape = Api.CreateShape("rect", 100 * 36000, 50 * 36000);
+var oDocContent = oShape.GetDocContent();
+var oParagraph = oDocContent.GetElement(0);
+oParagraph.AddText('sType: ' + sType);
+oSlide.AddObject(oShape);
+builder.SaveFile("pptx", "ToJSON.pptx");
+builder.CloseFile();
diff --git a/spec/pptx/smoke/api_master_spec.rb b/spec/pptx/smoke/api_master_spec.rb
new file mode 100644
index 00000000..4f31e653
--- /dev/null
+++ b/spec/pptx/smoke/api_master_spec.rb
@@ -0,0 +1,168 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+describe 'ApiMaster section tests' do
+  it 'ApiMaster | AddLayout method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/add_layout.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # expect(pptx.slide_masters.size).to eq(1)
+    # expect(pptx.slide_layouts.size).to eq(1)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Layouts before: 0, after: 1')
+  end
+
+  it 'ApiMaster | AddObject method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/add_object.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # expect(pptx.slide_masters.size).to eq(1)
+    shape_element = pptx.slide_masters[1].common_slide_data.shape_tree.elements.first
+    expect(shape_element.class).to eq(OoxmlParser::DocxShape)
+    expect(shape_element.text_body.paragraphs.first.runs.first.text).to eq('before: 0, after: 1')
+  end
+
+  it 'ApiMaster | ClearBackground method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/clear_background.js')
+    expect(pptx.slide_masters.size).to eq(1)
+    expect(pptx.slide_masters.first.common_slide_data.background.fill.color).to eq(:none)
+  end
+
+  it 'ApiMaster | Copy method' do
+    skip('Fixed since v8.1.1') if builder.semver <= Semantic::Version.new('8.1.0')
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/copy.js')
+    expect(pptx.slide_masters.size).to eq(2)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Masters before: 1, after: 2')
+  end
+
+  it 'ApiMaster | Delete method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/delete.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # заменить удаление второго мастера на первый
+    expect(pptx.slide_masters.size).to eq(1)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Masters before: 2, after: 1')
+  end
+
+  it 'ApiMaster | Duplicate method' do
+    skip('Fixed since v8.1.1') if builder.semver <= Semantic::Version.new('8.1.0')
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/duplicate.js')
+    expect(pptx.slide_masters.size).to eq(2)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Masters before: 1, after: 2')
+  end
+
+  it 'ApiMaster | GetAllCharts method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_all_charts.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # expect(pptx.slide_masters.size).to eq(1)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements.first.class).to eq(OoxmlParser::GraphicFrame)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Charts count: 1, type: chart')
+  end
+
+  it 'ApiMaster | GetAllDrawings method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_all_drawings.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # expect(pptx.slide_masters.size).to eq(1)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements.size).to eq(2)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements[0].class).to eq(OoxmlParser::DocxPicture)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements[1].class).to eq(OoxmlParser::GraphicFrame)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs[0].text).to eq('Drawings count: 2')
+    expect(slide_elements.first.text_body.paragraphs.first.runs[1].text).to eq('Types: drawing, drawing')
+  end
+
+  it 'ApiMaster | GetAllImages method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_all_images.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # expect(pptx.slide_masters.size).to eq(1)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements.first.class).to eq(OoxmlParser::DocxPicture)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Images count: 1, type: image')
+  end
+
+  it 'ApiMaster | GetAllOleObjects method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_all_ole_objects.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # expect(pptx.slide_masters.size).to eq(1)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements.first.class).to eq(OoxmlParser::GraphicFrame)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('OleObjects count: 1, type: oleObject')
+  end
+
+  it 'ApiMaster | GetAllShapes method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_all_shapes.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # expect(pptx.slide_masters.size).to eq(1)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements.first.class).to eq(OoxmlParser::DocxShape)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Shapes count: 1, type: shape')
+  end
+
+  it 'ApiMaster | GetClassType method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_class_type.js')
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('GetClassType type: master')
+  end
+
+  it 'ApiMaster | GetLayout method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_layout.js')
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('GetLayout layout type: layout')
+  end
+
+  it 'ApiMaster | GetLayoutsCount method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_layouts_count.js')
+    expect(pptx.slide_layouts.size).to eq(11)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Layouts count: 11')
+  end
+
+  it 'ApiMaster | GetTheme method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/get_theme.js')
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('GetTheme type: theme')
+  end
+
+  it 'ApiMaster | RemoveLayout method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/remove_layout.js')
+    expect(pptx.slide_layouts.size).to eq(4)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs.first.text).to eq('Layouts count before: 11 after: 4')
+  end
+
+  it 'ApiMaster | RemoveObject method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/remove_object.js')
+    # TODO: https://bugzilla.onlyoffice.com/show_bug.cgi?id=69619
+    # expect(pptx.slide_masters.size).to eq(1)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements.size).to eq(1)
+    expect(pptx.slide_masters[1].common_slide_data.shape_tree.elements.first.class).to eq(OoxmlParser::DocxPicture)
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs[0].text).to eq('Drawings count: 2')
+    expect(slide_elements.first.text_body.paragraphs.first.runs[1].text).to eq('Drawings count: 1')
+    expect(slide_elements.first.text_body.paragraphs.first.runs[2].text).to eq('Shapes: 0, images: 1')
+  end
+
+  it 'ApiMaster | SetBackground method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/set_background.js')
+    expect(pptx.slide_masters.size).to eq(1)
+    background_color = pptx.slide_masters.first.common_slide_data.background.fill.color
+    expect(background_color.gradient_stops[0].color).to eq(OoxmlParser::Color.new(255, 213, 191))
+    expect(background_color.gradient_stops[0].position).to eq(0)
+    expect(background_color.gradient_stops[1].color).to eq(OoxmlParser::Color.new(255, 111, 61))
+    expect(background_color.gradient_stops[1].position).to eq(100)
+  end
+
+  it 'ApiMaster | SetTheme method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/set_theme.js')
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs[0].text).to eq('SetTheme result: true')
+    expect(slide_elements.first.text_body.paragraphs.first.runs[1].text).to include('Times New Roman')
+  end
+
+  it 'ApiMaster | ToJSON method' do
+    pptx = builder.build_and_parse('js/pptx/smoke/api_master/to_json.js')
+    slide_elements = pptx.slides.first.common_slide_data.shape_tree.elements
+    expect(slide_elements.first.text_body.paragraphs.first.runs[0].text).to eq('sType: master')
+  end
+end