diff --git a/app/src/test/java/com/github/braillesystems/learnbraille/data/entities/ToXmlTest.kt b/app/src/test/java/com/github/braillesystems/learnbraille/data/entities/ToXmlTest.kt
index 37fcaa83..1c4b17e4 100644
--- a/app/src/test/java/com/github/braillesystems/learnbraille/data/entities/ToXmlTest.kt
+++ b/app/src/test/java/com/github/braillesystems/learnbraille/data/entities/ToXmlTest.kt
@@ -1,10 +1,38 @@
 package com.github.braillesystems.learnbraille.data.entities
 
+import com.github.braillesystems.learnbraille.data.dsl.LessonWithSteps
+import com.github.braillesystems.learnbraille.data.dsl.lessons
 import org.junit.Assert.assertEquals
 import org.junit.Test
 
 import com.github.braillesystems.learnbraille.data.entities.BrailleDot.F
 import com.github.braillesystems.learnbraille.data.entities.BrailleDot.E
+import com.github.braillesystems.learnbraille.res.golubinaIntroLessons
+import java.io.File
+
+internal val testLessons by lessons {
+    lesson(name = "first lesson") {
+        +FirstInfo("first title")
+    }
+}
+
+internal fun toXml(lesson: LessonWithSteps): HtmlText {
+    return object : XmlAble {
+        override val xmlTag: String = "lesson"
+
+        override val xmlParams: Map<String, String>
+            get() = mapOf("name" to lesson.first.name.replace("\"", "'"))
+
+        override val xmlBody: HtmlText
+            get() = {
+              var stepBuilder: HtmlText = ""
+                for(step in lesson.second.dropLast(1)){
+                    stepBuilder += (step.first.data.toXml() + "\n") // TODO [... <br>] -> [<p>...</p>]
+                }
+                stepBuilder + lesson.second.takeLast(1)[0].first.data.toXml()
+            }()
+    }.toXml()
+}
 
 class ToXmlTest {
     @Test
@@ -21,4 +49,22 @@ class ToXmlTest {
             assertEquals(expectedXml, stepData.toXml().replace("\n", ""))
         }
     }
+
+    @Test
+    fun lessonToXml() {
+        println(toXml(testLessons.lessons[0]))
+
+        var xmlText = ""
+        for(lessons in golubinaIntroLessons.lessons) {
+            xmlText += (toXml(lessons) + "\n")
+        }
+
+        val xmlLinesList = xmlText.split("\n")
+        File("course.xml").printWriter().use { out ->
+            out.println("<?xml version=\"1.0\" encoding=\"utf-8\"?>")
+            out.println("<root>")
+            xmlLinesList.forEach { out.println(it) }
+            out.println("</root>")
+        }
+    }
 }