add basic tests

1 files changed, 44 insertions, 0 deletions

diff --git a/tests/serde.rs b/tests/serde.rs
new file mode 100644
index 0000000..295b8d0
--- /dev/null
+++ b/tests/serde.rs
@@ -0,0 +1,44 @@
+use std::io::Cursor;
+use std::mem::size_of;
+
+use obi::{CompressionType, Image, ImageInfoHeader};
+
+#[test]
+fn size_of_image_info_header() {
+    let file_header_size = size_of::<ImageInfoHeader>();
+    assert_eq!(16, file_header_size);
+}
+
+#[test]
+fn compression() {
+    let img = Image::new(50, 5);
+    let encoded = img.encode().unwrap();
+    let mut cursor = Cursor::new(encoded);
+    let decoded = Image::decode(&mut cursor).unwrap();
+    assert_eq!(
+        CompressionType::from_u32(decoded.image_info_header.compression_type),
+        CompressionType::None
+    );
+}
+
+#[test]
+fn size_no_rounding() {
+    let img = Image::new(100, 80);
+    let encoded = img.encode().unwrap();
+    assert_eq!(encoded.len(), 26 + 100 * 80 / 8);
+    let mut cursor = Cursor::new(encoded);
+    let decoded = Image::decode(&mut cursor).unwrap();
+    assert_eq!(decoded.image_info_header.width, 100);
+    assert_eq!(decoded.image_info_header.height, 80);
+}
+
+#[test]
+fn size_round_nearest() {
+    let img = Image::new(50, 5);
+    let encoded = img.encode().unwrap();
+    assert_eq!(encoded.len(), 26 + 256 / 8);
+    let mut cursor = Cursor::new(encoded);
+    let decoded = Image::decode(&mut cursor).unwrap();
+    assert_eq!(decoded.image_info_header.width, 50);
+    assert_eq!(decoded.image_info_header.height, 5);
+}