[Swift 4] Update Minimum Coin Change

Author: remlostime

MinimumCoinChange/Tests/MinimumCoinChangeTests/MinimumCoinChangeTests.swift

@@ -2,27 +2,34 @@ import XCTest
 @testable import MinimumCoinChange
 
 class MinimumCoinChangeTests: XCTestCase {
-    func testExample() {
-        let mcc = MinimumCoinChange(coinSet: [1, 2, 5, 10, 20, 25])
-        print("Coin set: \(mcc.sortedCoinSet)")
-
-        do {
-            for i in 0..<100 {
-                let greedy = try mcc.changeGreedy(i)
-                let dynamic = try mcc.changeDynamic(i)
-
-                XCTAssertEqual(greedy.reduce(0, +), dynamic.reduce(0, +), "Greedy and Dynamic return two different changes")
-
-                if greedy.count != dynamic.count {
-                    print("\(i): greedy = \(greedy) dynamic = \(dynamic)")
-                }
-            }
-        } catch {
-            XCTFail("Test Failed: impossible to change with the given coin set")
+  func testSwift4() {
+    // last checked with Xcode 9.0b4
+    #if swift(>=4.0)
+      print("Hello, Swift 4!")
+    #endif
+  }
+  
+  func testExample() {
+    let mcc = MinimumCoinChange(coinSet: [1, 2, 5, 10, 20, 25])
+    print("Coin set: \(mcc.sortedCoinSet)")
+    
+    do {
+      for i in 0..<100 {
+        let greedy = try mcc.changeGreedy(i)
+        let dynamic = try mcc.changeDynamic(i)
+        
+        XCTAssertEqual(greedy.reduce(0, +), dynamic.reduce(0, +), "Greedy and Dynamic return two different changes")
+        
+        if greedy.count != dynamic.count {
+          print("\(i): greedy = \(greedy) dynamic = \(dynamic)")
         }
+      }
+    } catch {
+      XCTFail("Test Failed: impossible to change with the given coin set")
     }
-
-    static var allTests = [
-        ("testExample", testExample),
+  }
+  
+  static var allTests = [
+    ("testExample", testExample),
     ]
 }