Add bounds to the list of supported key paths. (#68)

Author: jverkoey

src/MDMAnimatableKeyPaths.h

@@ -52,6 +52,16 @@ typedef NSString * const MDMAnimatableKeyPath CF_TYPED_ENUM;
  */
 FOUNDATION_EXPORT MDMAnimatableKeyPath MDMKeyPathBackgroundColor NS_SWIFT_NAME(backgroundColor);
 
+/**
+ Bounds.
+
+ Equivalent UIView property: bounds
+ Equivalent CALayer property: bounds
+ Expected value type: CGRect or NSValue (containing a CGRect).
+ Additive animation supported: Yes.
+ */
+FOUNDATION_EXPORT MDMAnimatableKeyPath MDMKeyPathBounds NS_SWIFT_NAME(bounds);
+
 /**
  Corner radius.
 

src/MDMAnimatableKeyPaths.m

@@ -17,6 +17,7 @@
 #import "MDMAnimatableKeyPaths.h"
 
 MDMAnimatableKeyPath MDMKeyPathBackgroundColor = @"backgroundColor";
+MDMAnimatableKeyPath MDMKeyPathBounds = @"bounds";
 MDMAnimatableKeyPath MDMKeyPathCornerRadius = @"cornerRadius";
 MDMAnimatableKeyPath MDMKeyPathHeight = @"bounds.size.height";
 MDMAnimatableKeyPath MDMKeyPathOpacity = @"opacity";

tests/unit/ImplicitAnimationTests.swift

@@ -162,7 +162,7 @@ class ImplicitAnimationTests: XCTestCase {
     do {
       let animation = addedAnimations
         .flatMap { $0 as? CABasicAnimation }
-        .first(where: { $0.keyPath == "bounds"})!
+        .first(where: { $0.keyPath == AnimatableKeyPath.bounds.rawValue})!
       XCTAssertFalse(animation.isAdditive)
       XCTAssertEqual(animation.fromValue as! CGRect, .init(x: 0, y: 0, width: 0, height: 0))
       XCTAssertEqual(animation.toValue as! CGRect, .init(x: 0, y: 0, width: 100, height: 100))

tests/unit/MotionAnimatorTests.swift

@@ -34,6 +34,9 @@ class MotionAnimatorTests: XCTestCase {
 
     animator.animate(with: timing, to: layer,
                      withValues: [UIColor.blue, UIColor.red], keyPath: .backgroundColor)
+    animator.animate(with: timing, to: layer,
+                     withValues: [CGRect.zero, CGRect(x: 0, y: 0, width: 100, height: 50)],
+                     keyPath: .bounds)
     animator.animate(with: timing, to: layer, withValues: [0, 1], keyPath: .cornerRadius)
     animator.animate(with: timing, to: layer, withValues: [0, 1], keyPath: .height)
     animator.animate(with: timing, to: layer, withValues: [0, 1], keyPath: .opacity)

tests/unit/QuartzCoreBehavioralTests.swift

@@ -74,6 +74,7 @@ class QuartzCoreBehavioralTests: XCTestCase {
 
   func testWhichPropertiesImplicitlyAnimateButNotAdditively() {
     let properties: [AnimatableKeyPath: Any] = [
+      .bounds: CGRect(x: 0, y: 0, width: 123, height: 456),
       .cornerRadius: 3,
       .height: 100,
       .opacity: 0.5,

tests/unit/UIKitBehavioralTests.swift

@@ -71,6 +71,7 @@ class UIKitBehavioralTests: XCTestCase {
 
   func testSomePropertiesImplicitlyAnimateAdditively() {
     let properties: [AnimatableKeyPath: Any] = [
+      .bounds: CGRect(x: 0, y: 0, width: 123, height: 456),
       .cornerRadius: 3,
       .height: 100,
       .position: CGPoint(x: 50, y: 20),
@@ -150,6 +151,7 @@ class UIKitBehavioralTests: XCTestCase {
   func testNoPropertiesImplicitlyAnimateOutsideOfAnAnimationBlock() {
     let properties: [AnimatableKeyPath: Any] = [
       .backgroundColor: UIColor.blue,
+      .bounds: CGRect(x: 0, y: 0, width: 123, height: 456),
       .cornerRadius: 3,
       .height: 100,
       .opacity: 0.5,