add image manip apis

1 files changed, 49 insertions, 0 deletions

diff --git a/tests/image.rs b/tests/image.rs
new file mode 100644
index 0000000..2006a3b
--- /dev/null
+++ b/tests/image.rs
@@ -0,0 +1,49 @@
+use obi::Image;
+
+#[test]
+fn image_indexing() {
+    let (width, height) = (30, 50);
+    let img = Image::new(width, height);
+    for x in 0..width {
+        for y in 0..height {
+            assert_eq!((y * width + x) as usize, img.index(x, y).unwrap());
+        }
+    }
+}
+
+#[test]
+#[should_panic]
+fn x_value_out_of_bounds() {
+    let img = Image::new(30, 50);
+    img.index(30, 0).unwrap();
+}
+
+#[test]
+#[should_panic]
+fn y_value_out_of_bounds() {
+    let img = Image::new(30, 50);
+    img.index(0, 50).unwrap();
+}
+
+#[test]
+fn pixel_setter_and_getters() {
+    let mut img = Image::new(100, 200);
+    img.set(2, 3, true).unwrap();
+    assert!(img.get(2, 3).unwrap());
+    assert_eq!(1, img.data.iter().filter(|&&x| x).count());
+}
+
+#[test]
+fn flip_bits() {
+    let (width, height) = (100, 200);
+    let mut img = Image::new(width, height);
+    img.set(2, 3, true).expect("Indexing error");
+    for i in 0..width {
+        for j in 0..height {
+            img.flip(i, j).unwrap();
+        }
+    }
+    let mut expected = Image::new_with(width, height, true);
+    expected.set(2, 3, false).expect("Indexing error");
+    assert_eq!(expected.data, img.data);
+}