diff --git a/examples/bsp_interior.rs b/examples/bsp_interior.rs
new file mode 100644
index 0000000..4fa4ece
--- /dev/null
+++ b/examples/bsp_interior.rs
@@ -0,0 +1,10 @@
+use rand::prelude::*;
+use mapgen::*;
+
+
+fn main() {
+    let mut rng = StdRng::seed_from_u64(907647352);
+    let gen = BspInterior::new();
+    let map = gen.modify_map(&mut rng, &Map::new(80, 50));
+    println!("{:}", &map);
+}
\ No newline at end of file
diff --git a/examples/bsp_rooms.rs b/examples/bsp_rooms.rs
new file mode 100644
index 0000000..cf3ca9b
--- /dev/null
+++ b/examples/bsp_rooms.rs
@@ -0,0 +1,12 @@
+use std::time::{SystemTime, UNIX_EPOCH};
+use rand::prelude::*;
+use mapgen::*;
+
+
+fn main() {
+    let system_time = SystemTime::now().duration_since(UNIX_EPOCH).expect("Can't access system time");
+    let mut rng = StdRng::seed_from_u64(system_time.as_millis() as u64);
+    let gen = BspRooms::new();
+    let map = gen.modify_map(&mut rng, &Map::new(80, 50));
+    println!("{:}", &map);
+}
\ No newline at end of file
diff --git a/src/filter/bsp_interior.rs b/src/filter/bsp_interior.rs
index 8999b9a..aeb05fe 100644
--- a/src/filter/bsp_interior.rs
+++ b/src/filter/bsp_interior.rs
@@ -105,4 +105,30 @@ impl BspInterior {
             if half_height > self.min_room_size { self.add_subrects(v2, rng, rects); }
         }
     }
+}
+
+
+/// ------------------------------------------------------------------------------------------------
+/// Module unit tests
+/// ------------------------------------------------------------------------------------------------
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::{TileType, Map};
+
+    #[test]
+    fn no_corridors_on_borders() {
+         let mut rng = StdRng::seed_from_u64(907647352);
+        let gen = BspInterior::new();
+        let map = gen.modify_map(&mut rng, &Map::new(80, 50));
+        for i in 0..80 {
+            assert_eq!(map.at(i, 0), TileType::Wall);
+            assert_eq!(map.at(i, 49), TileType::Wall);
+        } 
+        for j in 0..50 {
+            assert_eq!(map.at(0, j), TileType::Wall);
+            assert_eq!(map.at(79, j), TileType::Wall);
+        } 
+    }
+
 }
\ No newline at end of file
diff --git a/src/filter/bsp_rooms.rs b/src/filter/bsp_rooms.rs
index 56fbff1..c459f4a 100644
--- a/src/filter/bsp_rooms.rs
+++ b/src/filter/bsp_rooms.rs
@@ -131,4 +131,29 @@ impl BspRooms {
 
         can_build
     }
+}
+
+/// ------------------------------------------------------------------------------------------------
+/// Module unit tests
+/// ------------------------------------------------------------------------------------------------
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::map::Map;
+
+    #[test]
+    fn no_corridors_on_borders() {
+         let mut rng = StdRng::seed_from_u64(907647352);
+        let gen = BspRooms::new();
+        let map = gen.modify_map(&mut rng, &Map::new(80, 50));
+        for i in 0..80 {
+            assert_eq!(map.at(i, 0), TileType::Wall);
+            assert_eq!(map.at(i, 49), TileType::Wall);
+        } 
+        for j in 0..50 {
+            assert_eq!(map.at(0, j), TileType::Wall);
+            assert_eq!(map.at(79, j), TileType::Wall);
+        } 
+    }
+
 }
\ No newline at end of file