Make improvements to the CI (#54)

- Switch the default branch to "main"
- Run `cargo fmt --check` during CI
- Format the source code
- Improve job names

.github/workflows/main.yml

@@ -2,7 +2,7 @@ name: CI
 
 on:
   push:
-    branches: [master]
+    branches: [main]
   pull_request:
   merge_group:
     types: [checks_requested]
@@ -17,13 +17,13 @@ jobs:
           toolchain: stable
           override: true
           profile: minimal
+      - name: Check Formatting 
+        run: cargo fmt --check
       - name: Test
         run: cargo test
-
-      - name: Serde check
+      - name: Check (`--features="serde_serialization"`)
         run: cargo check --features="serde_serialization"
-
-      - name: Num traits check
+      - name: Check (`--features="num_traits"`)
         run: cargo check --features="num_traits"
 
   build_result:

src/app_unit.rs

@@ -5,21 +5,24 @@
 #[cfg(feature = "num_traits")]
 use num_traits::Zero;
 #[cfg(feature = "serde_serialization")]
-use serde::{Serialize, Deserialize, Deserializer};
+use serde::{Deserialize, Deserializer, Serialize};
 
-use std::{fmt, i32, default::Default, ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Rem, Sub, SubAssign}};
 use std::iter::Sum;
+use std::{
+    default::Default,
+    fmt, i32,
+    ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Rem, Sub, SubAssign},
+};
 
 /// The number of app units in a pixel.
 pub const AU_PER_PX: i32 = 60;
 /// The minimum number of app units, same as in Gecko.
-pub const MIN_AU: Au = Au(- ((1 << 30) - 1));
+pub const MIN_AU: Au = Au(-((1 << 30) - 1));
 /// The maximum number of app units, same as in Gecko.
-/// 
+///
 /// (1 << 30) - 1 lets us add/subtract two Au and check for overflow after the operation.
 pub const MAX_AU: Au = Au((1 << 30) - 1);
 
-
 #[repr(transparent)]
 #[derive(Clone, Copy, Hash, PartialEq, PartialOrd, Eq, Ord, Default)]
 #[cfg_attr(feature = "serde_serialization", derive(Serialize), serde(transparent))]
@@ -73,7 +76,6 @@ impl Sub for Au {
     fn sub(self, other: Au) -> Au {
         Au(self.0 - other.0).clamp()
     }
-
 }
 
 impl Mul<Au> for i32 {
@@ -391,7 +393,7 @@ fn convert() {
     assert_eq!(Au::from_f64_px(6.13), Au(368));
 }
 
-#[cfg(feature ="serde_serialization")]
+#[cfg(feature = "serde_serialization")]
 #[test]
 fn serialize() {
     let serialized = ron::to_string(&Au(42)).unwrap();

src/lib.rs

@@ -8,4 +8,4 @@
 
 mod app_unit;
 
-pub use app_unit::{Au, MIN_AU, MAX_AU, AU_PER_PX};
+pub use app_unit::{Au, AU_PER_PX, MAX_AU, MIN_AU};