[shape] fix circle

Package.resolved

@@ -6,7 +6,7 @@
       "location" : "https://github.com/honghaoz/ChouTi",
       "state" : {
         "branch" : "develop",
-        "revision" : "43251518cd40350ffa0ac60c3a14c1e5cf0b9858"
+        "revision" : "1c03bcbb24e853d2e1b8270d4afc136ecf906394"
       }
     }
   ],

Sources/ChouTiUI/Universal/Shape/Shapes/Circle.swift

@@ -49,7 +49,22 @@ public struct Circle: Shape, OffsetableShape {
   // MARK: - Shape
 
   public func path(in rect: CGRect) -> CGPath {
-    CGPath(ellipseIn: rect, transform: nil)
+    guard rect.size.area > 0 else {
+      return CGPath(ellipseIn: .zero, transform: nil)
+    }
+    return CGPath(ellipseIn: rect.squareRect(), transform: nil)
+
+    // 1000 times performance:
+    // 0.000466375s for CGPath.init(ellipseIn:transform:)
+    //
+    // 0.000886791 for the below code:
+    // BezierPath(
+    //   arcCenter: rect.center,
+    //   radius: min(rect.width, rect.height) / 2,
+    //   startAngle: 0,
+    //   endAngle: 2 * CGFloat.pi,
+    //   clockwise: true
+    // ).cgPath
   }
 
   // MARK: - OffsetableShape

Tests/ChouTiUITests/Universal/Shape/Shapes/CircleTests.swift

@@ -32,6 +32,7 @@ import CoreGraphics
 
 import ChouTiTest
 
+import ChouTi
 import ChouTiUI
 
 class CircleTests: XCTestCase {
@@ -72,15 +73,15 @@ class CircleTests: XCTestCase {
       let shape = Circle()
       let rect = CGRect(x: 0, y: 0, width: -100, height: -100)
       let path = shape.path(in: rect)
-      expect(path) == CGPath(ellipseIn: rect, transform: nil)
+      expect(path) == CGPath(ellipseIn: .zero, transform: nil)
     }
 
     // rect with negative width
     do {
       let shape = Circle()
       let rect = CGRect(x: 0, y: 0, width: -100, height: 100)
       let path = shape.path(in: rect)
-      expect(path) == CGPath(ellipseIn: rect, transform: nil)
+      expect(path) == CGPath(ellipseIn: .zero, transform: nil)
     }
   }