add more unit tests

examples/announce/src/main.rs

@@ -1,4 +1,5 @@
 use clap::Parser;
+
 use servicepoint2::{ByteGrid, Command, Connection, Origin};
 
 #[derive(Parser, Debug)]
@@ -43,6 +44,6 @@ fn main() {
     }
 
     connection
-        .send(Command::Cp437Data(Origin::top_left(), chars).into())
+        .send(Command::Cp437Data(Origin(0, 0), chars).into())
         .unwrap();
 }

examples/game_of_life/src/main.rs

@@ -25,7 +25,7 @@ fn main() {
         connection
             .send(
                 Command::BitmapLinearWin(
-                    Origin::top_left(),
+                    Origin(0, 0),
                     field.clone(),
                     CompressionCode::Bzip2,
                 )

examples/moving_line/src/main.rs

@@ -4,8 +4,8 @@ use std::time::Duration;
 use clap::Parser;
 
 use servicepoint2::{
-    Command, CompressionCode, Connection, Origin, PixelGrid, PIXEL_HEIGHT,
-    PIXEL_WIDTH,
+    Command, CompressionCode, Connection, Origin, PIXEL_HEIGHT, PIXEL_WIDTH,
+    PixelGrid,
 };
 
 #[derive(Parser, Debug)]
@@ -29,7 +29,7 @@ fn main() {
         connection
             .send(
                 Command::BitmapLinearWin(
-                    Origin::top_left(),
+                    Origin(0, 0),
                     pixels.clone(),
                     CompressionCode::Lzma,
                 )

examples/random_brightness/src/main.rs

@@ -3,11 +3,11 @@ use std::time::Duration;
 use clap::Parser;
 use rand::Rng;
 
-use servicepoint2::Command::{BitmapLinearWin, Brightness, CharBrightness};
 use servicepoint2::{
     ByteGrid, CompressionCode, Connection, Origin, PixelGrid, TILE_HEIGHT,
     TILE_WIDTH,
 };
+use servicepoint2::Command::{BitmapLinearWin, Brightness, CharBrightness};
 
 #[derive(Parser, Debug)]
 struct Cli {
@@ -32,7 +32,7 @@ fn main() {
         filled_grid.fill(true);
 
         let command = BitmapLinearWin(
-            Origin::top_left(),
+            Origin(0, 0),
             filled_grid,
             CompressionCode::Lzma,
         );