diff --git a/ChromaColorPicker.xcodeproj/project.pbxproj b/ChromaColorPicker.xcodeproj/project.pbxproj
index e04b788..a7fb596 100644
--- a/ChromaColorPicker.xcodeproj/project.pbxproj
+++ b/ChromaColorPicker.xcodeproj/project.pbxproj
@@ -17,6 +17,7 @@
 		35C376DB1D5CF5300069D7A1 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 35C376D91D5CF5300069D7A1 /* LaunchScreen.storyboard */; };
 		FC1BD8C02207D7B700817AF3 /* ChromaColorPickerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = FC1BD8BF2207D7B700817AF3 /* ChromaColorPickerTests.swift */; };
 		FC1BD8C22207D7B700817AF3 /* ChromaColorPicker.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 3503B82F1F2689BC00750356 /* ChromaColorPicker.framework */; };
+		FC4387C422603AE900F739F1 /* ColorWheelViewTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = FCCA42AB226038A400BE2FF9 /* ColorWheelViewTests.swift */; };
 		FCCA42A5226022A800BE2FF9 /* ColorWheelView.swift in Sources */ = {isa = PBXBuildFile; fileRef = FCCA42A4226022A800BE2FF9 /* ColorWheelView.swift */; };
 		FCCA42A7226023F000BE2FF9 /* ChromaColorHandle.swift in Sources */ = {isa = PBXBuildFile; fileRef = FCCA42A6226023F000BE2FF9 /* ChromaColorHandle.swift */; };
 		FCCA42AA2260329900BE2FF9 /* UIKit+DropShadow.swift in Sources */ = {isa = PBXBuildFile; fileRef = FCCA42A92260329900BE2FF9 /* UIKit+DropShadow.swift */; };
@@ -77,6 +78,7 @@
 		FCCA42A4226022A800BE2FF9 /* ColorWheelView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ColorWheelView.swift; sourceTree = "<group>"; };
 		FCCA42A6226023F000BE2FF9 /* ChromaColorHandle.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChromaColorHandle.swift; sourceTree = "<group>"; };
 		FCCA42A92260329900BE2FF9 /* UIKit+DropShadow.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIKit+DropShadow.swift"; sourceTree = "<group>"; };
+		FCCA42AB226038A400BE2FF9 /* ColorWheelViewTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ColorWheelViewTests.swift; sourceTree = "<group>"; };
 		FCEA4E262235AAA200C0A1B6 /* ChromaColorPicker.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChromaColorPicker.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -157,7 +159,9 @@
 		FC1BD8BE2207D7B700817AF3 /* Tests */ = {
 			isa = PBXGroup;
 			children = (
+				FCCA42AD226038BD00BE2FF9 /* Extensions */,
 				FC1BD8BF2207D7B700817AF3 /* ChromaColorPickerTests.swift */,
+				FCCA42AB226038A400BE2FF9 /* ColorWheelViewTests.swift */,
 				FC1BD8C12207D7B700817AF3 /* Info.plist */,
 			);
 			path = Tests;
@@ -184,6 +188,13 @@
 			path = Extensions;
 			sourceTree = "<group>";
 		};
+		FCCA42AD226038BD00BE2FF9 /* Extensions */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			path = Extensions;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */
@@ -353,6 +364,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				FC1BD8C02207D7B700817AF3 /* ChromaColorPickerTests.swift in Sources */,
+				FC4387C422603AE900F739F1 /* ColorWheelViewTests.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/Tests/ColorWheelViewTests.swift b/Tests/ColorWheelViewTests.swift
new file mode 100644
index 0000000..dfd3ff8
--- /dev/null
+++ b/Tests/ColorWheelViewTests.swift
@@ -0,0 +1,137 @@
+//
+//  ColorWheelTests.swift
+//  ChromaColorPickerTests
+//
+//  Created by Jon Cardasis on 4/11/19.
+//  Copyright © 2019 Jonathan Cardasis. All rights reserved.
+//
+
+import XCTest
+@testable import ChromaColorPicker
+
+class ColorWheelViewTests: XCTestCase {
+    
+    var subject: ColorWheelView!
+    
+    override func setUp() {
+        subject = ColorWheelView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
+    }
+    
+    func testBackgroundIsClear() {
+        XCTAssertEqual(subject.backgroundColor, .clear)
+    }
+    
+    func testImageViewUsesAspectFit() {
+        XCTAssertEqual(subject.imageView.contentMode, .scaleAspectFit)
+    }
+    
+    func testLayerCornerRadiusUpdatesDuringLayout() {
+        // Given
+        subject.frame = CGRect(x: 0, y: 0, width: 200, height: 0)
+        
+        // When
+        subject.layoutSubviews()
+        
+        // Then
+        XCTAssertEqual(subject.layer.cornerRadius, subject.radius)
+    }
+    
+    func testRadiusIfHalfOfWidthWhenWidthIsLargestDimension() {
+        // Given, When
+        subject.frame = CGRect(x: 0, y: 0, width: 200, height: 0)
+        
+        // Then
+        XCTAssertEqual(subject.radius, 100)
+    }
+    
+    func testRadiusIfHalfOfHeightWhenHeightIsLargestDimension() {
+        // Given, When
+        subject.frame = CGRect(x: 0, y: 0, width: 0, height: 200)
+        
+        // Then
+        XCTAssertEqual(subject.radius, 100)
+    }
+    
+    func testColorWheelImageIsGeneratedEveryLayoutCycle() {
+        // Given
+        let width: CGFloat = 200.0
+        let screenScalar: CGFloat = UIScreen.main.scale
+        let expectedFinalSize = CGSize(width: width * screenScalar, height: width * screenScalar)
+        
+        // When
+        subject.layoutSubviews()
+        let firstImage = subject.imageView.image!
+        subject.frame = CGRect(x: 0, y: 0, width: width, height: width * 2.0)
+        subject.layoutSubviews()
+        let secondImage = subject.imageView.image!
+        
+        // Then
+        XCTAssertNotEqual(firstImage, secondImage)
+        XCTAssertEqual(secondImage.size, expectedFinalSize)
+    }
+    
+    func testPixelColorShouldReturnNilForPointOutsideBounds() {
+        // Given, When
+        let testPoint = CGPoint(x: -100, y: -100)
+        // Then
+        XCTAssertNil(subject.pixelColor(at: testPoint))
+    }
+    
+    func testPixelColorShouldReturnNilForPointInBoundsButOutsideRadius() {
+        // Given, When
+        let testPoint = CGPoint(x: 0, y: 0)
+        // Then
+        XCTAssertNil(subject.pixelColor(at: testPoint))
+    }
+    
+    func testPixelColorShouldBeRedAtMaxXMidY() {
+        // Given, When
+        let size = subject.frame.size
+        // Note: Due to the wheel being HUE, any angle will share the same value, therefore
+        // we can safely inset the width to compensate for any color smoothing at the edges.
+        let testPoint = CGPoint(x: size.width - 25, y: size.height / 2.0)
+        let (expectedRedValue, _, _) = UIColor.red.rgbValues
+        
+        let vc = UIViewController()
+        vc.view.addSubview(subject)
+        vc.beginAppearanceTransition(true, animated: false)
+        vc.endAppearanceTransition()
+        
+        // When
+        let (actualRedValue, _, _) = subject.pixelColor(at: testPoint)!.rgbValues
+        
+        // Then
+        XCTAssertEqual(actualRedValue, expectedRedValue, accuracy: 0.001)
+    }
+    
+    func testPixelColorShouldBeWhiteAtTheCenter() {
+        // Given, When
+        let size = subject.frame.size
+        let testPoint = CGPoint(x: size.width / 2.0, y: size.height / 2.0)
+        let expectedColorValues = UIColor.white.rgbValues
+        
+        let vc = UIViewController()
+        vc.view.addSubview(subject)
+        vc.beginAppearanceTransition(true, animated: false)
+        vc.endAppearanceTransition()
+        
+        // When
+        let actualColorValues = subject.pixelColor(at: testPoint)!.rgbValues
+        
+        // Then
+        XCTAssertEqual(actualColorValues.red, expectedColorValues.red, accuracy: 0.005)
+        XCTAssertEqual(actualColorValues.green, expectedColorValues.green, accuracy: 0.005)
+        XCTAssertEqual(actualColorValues.blue, expectedColorValues.blue, accuracy: 0.005)
+    }
+    
+}
+
+private extension UIColor {
+    var rgbValues: (red: CGFloat, green: CGFloat, blue: CGFloat) {
+        var red: CGFloat = 0
+        var green: CGFloat = 0
+        var blue: CGFloat = 0
+        getRed(&red, green: &green, blue: &blue, alpha: nil)
+        return (red, green, blue)
+    }
+}