1 files changed, 33 insertions, 1 deletions
diff --git a/src/vga/buffer.rs b/src/vga/buffer.rs
index 34c665d..4ca001c 100644
--- a/src/vga/buffer.rs
+++ b/src/vga/buffer.rs
@@ -109,6 +109,7 @@ impl NullLock<VgaWriter> {
 		});
 	}
 
+	#[allow(dead_code)]
 	pub fn write_string(&self, s: &str) {
 		self.lock(|writer| {
 			writer.write_string(s);
@@ -152,6 +153,37 @@ macro_rules! println {
 
 pub static WRITER: NullLock<VgaWriter> = NullLock::new(VgaWriter {
 	column_position: 0,
-	color_code: ColorCode::new(Color::Yellow, Color::Black),
+	color_code: ColorCode::new(Color::LightBlue, Color::Black),
 	buffer: None,
 });
+
+#[test_case]
+fn test_println_simple() {
+	println!("test_println_simple output");
+}
+
+#[test_case]
+fn test_println_many() {
+	for _ in 0..200 {
+		println!("test_println_many output");
+	}
+}
+
+#[test_case]
+fn test_println_output() {
+	let s = "Some test string that fits on a single line";
+	println!("{}", s);
+	for (i, c) in s.chars().enumerate() {
+		let screen_char = WRITER.lock(|writer| {
+			if let Some(buffer) = &writer.buffer {
+				return buffer.chars[BUFFER_HEIGHT - 2][i].read();
+			} else {
+				return ScreenChar {
+					ascii_character: b' ',
+					color_code: ColorCode::new(Color::LightBlue, Color::Black),
+				};
+			}
+		});
+		assert_eq!(char::from(screen_char.ascii_character), c);
+	}
+}