Added data model and tests

iOSTemplate.xcodeproj/project.pbxproj

@@ -8,6 +8,7 @@
 
 /* Begin PBXBuildFile section */
 		37154FE2222CBCFE006731A8 /* RatingControl.swift in Sources */ = {isa = PBXBuildFile; fileRef = 37154FE1222CBCFE006731A8 /* RatingControl.swift */; };
+		37154FE4222F1EF7006731A8 /* Meal.swift in Sources */ = {isa = PBXBuildFile; fileRef = 37154FE3222F1EF7006731A8 /* Meal.swift */; };
 		3775361422234238005EE5FE /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3775361322234238005EE5FE /* AppDelegate.swift */; };
 		3775361622234238005EE5FE /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3775361522234238005EE5FE /* ViewController.swift */; };
 		3775361922234238005EE5FE /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 3775361722234238005EE5FE /* Main.storyboard */; };
@@ -36,6 +37,7 @@
 
 /* Begin PBXFileReference section */
 		37154FE1222CBCFE006731A8 /* RatingControl.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RatingControl.swift; sourceTree = "<group>"; };
+		37154FE3222F1EF7006731A8 /* Meal.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Meal.swift; sourceTree = "<group>"; };
 		3775361022234238005EE5FE /* iOSTemplate.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = iOSTemplate.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		3775361322234238005EE5FE /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		3775361522234238005EE5FE /* ViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewController.swift; sourceTree = "<group>"; };
@@ -101,6 +103,7 @@
 			children = (
 				3775361322234238005EE5FE /* AppDelegate.swift */,
 				3775361522234238005EE5FE /* ViewController.swift */,
+				37154FE3222F1EF7006731A8 /* Meal.swift */,
 				3775361722234238005EE5FE /* Main.storyboard */,
 				37154FE1222CBCFE006731A8 /* RatingControl.swift */,
 				3775361A22234238005EE5FE /* Assets.xcassets */,
@@ -258,6 +261,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				37154FE4222F1EF7006731A8 /* Meal.swift in Sources */,
 				3775361622234238005EE5FE /* ViewController.swift in Sources */,
 				37154FE2222CBCFE006731A8 /* RatingControl.swift in Sources */,
 				3775361422234238005EE5FE /* AppDelegate.swift in Sources */,

iOSTemplate/Meal.swift

+//
+//  Meal.swift
+//  iOSTemplate
+//
+//  Created by John Hampton on 3/5/19.
+//
+
+import UIKit
+
+class Meal {
+    // MARK: Properties
+    
+    var name: String
+    var photo: UIImage?
+    var rating: Int
+ 
+    // MARK: Initialization
+    
+    init?(name: String, photo: UIImage?, rating: Int) {
+        // The name must not be empty
+        guard !name.isEmpty else {
+            return nil
+        }
+        
+        // The rating must be between 0 and 5 inclusively
+        guard (rating >= 0) && (rating <= 5) else {
+            return nil
+        }
+        
+        // Initialize stored properties.
+        self.name = name
+        self.photo = photo
+        self.rating = rating
+    }
+}

iOSTemplateTests/iOSTemplateTests.swift

@@ -10,24 +10,31 @@ import XCTest
 
 class iOSTemplateTests: XCTestCase {
 
-    override func setUp() {
-        // Put setup code here. This method is called before the invocation of each test method in the class.
-    }
+    // MARK: Meal Class Tests
 
-    override func tearDown() {
-        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    // Confirm that the Meal initializer returns a Meal object when passed valid parameters.
+    func testMealInitializationSucceeds() {
+        // Zero rating
+        let zeroRatingMeal = Meal.init(name: "Zero", photo: nil, rating: 0)
+        XCTAssertNotNil(zeroRatingMeal)
+        
+        // Highest positive rating
+        let positiveRatingMeal = Meal.init(name: "Positive", photo: nil, rating: 5)
+        XCTAssertNotNil(positiveRatingMeal)
     }
-
-    func testExample() {
-        // This is an example of a functional test case.
-        // Use XCTAssert and related functions to verify your tests produce the correct results.
+    
+    // Confirm that the Meal initialier returns nil when passed a negative rating or an empty name.
+    func testMealInitializationFails() {
+        // Negative rating
+        let negativeRatingMeal = Meal.init(name: "Negative", photo: nil, rating: -1)
+        XCTAssertNil(negativeRatingMeal)
+        
+        // Empty String
+        let emptyStringMeal = Meal.init(name: "", photo: nil, rating: 0)
+        XCTAssertNil(emptyStringMeal)
+        
+        // Rating exceeds maximum
+        let largeRatingMeal = Meal.init(name: "Large", photo: nil, rating: 6)
+        XCTAssertNil(largeRatingMeal)
     }
-
-    func testPerformanceExample() {
-        // This is an example of a performance test case.
-        self.measure {
-            // Put the code you want to measure the time of here.
-        }
-    }
-
 }