rename apply to map just like the image crate, one more test

bingus/src/img/image.rs

@@ -65,7 +65,7 @@ where
     P: Send + Sync,
 {
     type Unit = P;
-    fn apply<F: Fn(&Self::Unit) -> Self::Unit + Sync>(mut self, f: F) -> Self {
+    fn map<F: Fn(&Self::Unit) -> Self::Unit + Sync>(mut self, f: F) -> Self {
         self.par_pixels_mut().for_each(|p| *p = f(p));
         self
     }
@@ -186,4 +186,19 @@ mod tests {
             )
         }
     }
+
+    #[cfg(test)]
+    mod effects {
+        use crate::Bendable;
+
+        use super::super::{Pixel, RgbImage};
+
+        #[test]
+        fn fill_with_funny_number() {
+            let image = RgbImage::new(8, 16);
+            let new_image = image.clone().map(|p| p.map(|_channel| 42u8));
+            assert_ne!(image.clone(), new_image);
+            assert_eq!(42, new_image.get_pixel(1, 2).channels()[1])
+        }
+    }
 }

bingus/src/lib.rs

@@ -18,7 +18,7 @@ pub trait Bendable: TryFromDataBytes + IntoDataBytes {
     ) -> Result<Self, <Self as TryFromDataBytes>::Error> {
         Self::try_from_bytes(b.into_bytes(), format)
     }
-    fn apply<F: Fn(&Self::Unit) -> Self::Unit + Sync>(self, f: F) -> Self;
+    fn map<F: Fn(&Self::Unit) -> Self::Unit + Sync>(self, f: F) -> Self;
 }
 
 pub trait IntoDataBytes: Sized {