ref: use assert_eq not assert

This way, the test log can show the expected and actual result if it fails.

thread 'steps::tests::test_conversion_fallback_colors' (61338) panicked at cosmic-theme/src/steps.rs:213:9:
assertion `left == right` failed
  left: 102
 right: 103
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

cosmic-theme/src/steps.rs

@@ -188,41 +188,41 @@ mod tests {
     fn test_conversion_colors() {
         let c1 = palette::Oklcha::new(0.4608, 0.11111, OklabHue::new(57.31), 1.0);
         let srgb = oklch_to_srgba_nearest_chroma(c1).into_format::<u8, u8>();
-        assert!(srgb.red == 133);
-        assert!(srgb.green == 69);
-        assert!(srgb.blue == 0);
+        assert_eq!(srgb.red, 133);
+        assert_eq!(srgb.green, 69);
+        assert_eq!(srgb.blue, 0);
 
         let c1 = palette::Oklcha::new(0.30, 0.08, OklabHue::new(35.0), 1.0);
         let srgb = oklch_to_srgba_nearest_chroma(c1).into_format::<u8, u8>();
-        assert!(srgb.red == 78);
-        assert!(srgb.green == 27);
-        assert!(srgb.blue == 15);
+        assert_eq!(srgb.red, 78);
+        assert_eq!(srgb.green, 27);
+        assert_eq!(srgb.blue, 15);
 
         let c1 = palette::Oklcha::new(0.757, 0.146, OklabHue::new(301.2), 1.0);
         let srgb = oklch_to_srgba_nearest_chroma(c1).into_format::<u8, u8>();
-        assert!(srgb.red == 192);
-        assert!(srgb.green == 153);
-        assert!(srgb.blue == 253);
+        assert_eq!(srgb.red, 192);
+        assert_eq!(srgb.green, 153);
+        assert_eq!(srgb.blue, 253);
     }
 
     #[test]
     fn test_conversion_fallback_colors() {
         let c1 = palette::Oklcha::new(0.70, 0.284, OklabHue::new(35.0), 1.0);
         let srgb = oklch_to_srgba_nearest_chroma(c1).into_format::<u8, u8>();
-        assert!(srgb.red == 255);
-        assert!(srgb.green == 103);
-        assert!(srgb.blue == 65);
+        assert_eq!(srgb.red, 255);
+        assert_eq!(srgb.green, 103);
+        assert_eq!(srgb.blue, 65);
 
         let c1 = palette::Oklcha::new(0.757, 0.239, OklabHue::new(301.2), 1.0);
         let srgb = oklch_to_srgba_nearest_chroma(c1).into_format::<u8, u8>();
-        assert!(srgb.red == 193);
-        assert!(srgb.green == 152);
-        assert!(srgb.blue == 255);
+        assert_eq!(srgb.red, 193);
+        assert_eq!(srgb.green, 152);
+        assert_eq!(srgb.blue, 255);
 
         let c1 = palette::Oklcha::new(0.163, 0.333, OklabHue::new(141.0), 1.0);
         let srgb = oklch_to_srgba_nearest_chroma(c1).into_format::<u8, u8>();
-        assert!(srgb.red == 1);
-        assert!(srgb.green == 19);
-        assert!(srgb.blue == 0);
+        assert_eq!(srgb.red, 1);
+        assert_eq!(srgb.green, 19);
+        assert_eq!(srgb.blue, 0);
     }
 }