feat: доработка API

app/src/test/java/ru/nm17/narodmon/ExampleUnitTest.kt

@@ -3,6 +3,7 @@ package ru.nm17.narodmon
 import org.junit.Test
 
 import org.junit.Assert.*
+import java.net.URL
 
 /**
  * Example local unit test, which will execute on the development machine (host).
@@ -13,5 +14,6 @@ class ExampleUnitTest {
     @Test
     fun addition_isCorrect() {
         assertEquals(4, 2 + 2)
+        URL("https://tile.openstreetmap.org/${zoom}/${row}/${col}").openStream()
     }
 }