Minor cleanup of test and linting issues

Author: TheCodedSelf

Example/SwiftCronExampleTests/TimeZoneTests.swift

@@ -3,16 +3,6 @@ import SwiftCron
 
 class TimeZoneTests: XCTestCase {
 
-    override func setUp() {
-        super.setUp()
-        // Put setup code here. This method is called before the invocation of each test method in the class.
-    }
-
-    override func tearDown() {
-        // Put teardown code here. This method is called after the invocation of each test method in the class.
-        super.tearDown()
-    }
-
     func testTimeZoneDifferencesResultInVariationOfNextRunDate() {
         let newYorkTZ = TimeZone(identifier: "America/New_York")!
         let losAngelesTZ = TimeZone(identifier: "America/Los_Angeles")!
@@ -22,6 +12,10 @@ class TimeZoneTests: XCTestCase {
         let nextRunNewYorkTZ = cronExpression.getNextRunDateFromNow(adjustingForTimeZone: newYorkTZ)!
         let nextRunLosAngelesTZ = cronExpression.getNextRunDateFromNow(adjustingForTimeZone: losAngelesTZ)!
 
-        XCTAssertNotEqual(nextRunNewYorkTZ, nextRunLosAngelesTZ)
+        let milliDiff = nextRunLosAngelesTZ.timeIntervalSince1970 - nextRunNewYorkTZ.timeIntervalSince1970
+        let hourDiff = milliDiff / (60*60)
+
+        let expectedTimezoneOffset: Double = 3
+        XCTAssertEqual(expectedTimezoneOffset, hourDiff)
     }
 }

README.md

@@ -1,6 +1,6 @@
 SwiftCron
 ==============
-[![Build Status](https://travis-ci.org/TheCodedSelf/SwiftCron.svg?branch=master)](https://travis-ci.org/TheCodedSelf/SwiftCron) [![codecov](https://codecov.io/gh/TheCodedSelf/SwiftCron/branch/master/graph/badge.svg)](https://codecov.io/gh/TheCodedSelf/SwiftCron) [![CocoaPod Version](https://img.shields.io/cocoapods/v/SwiftCron.svg)](http://cocoapods.org/pods/SwiftCron)
+[![codecov](https://codecov.io/gh/TheCodedSelf/SwiftCron/branch/master/graph/badge.svg)](https://codecov.io/gh/TheCodedSelf/SwiftCron) [![CocoaPod Version](https://img.shields.io/cocoapods/v/SwiftCron.svg)](http://cocoapods.org/pods/SwiftCron)
 
 A cron expression parser that can take a cron string and give you the next run date and time specified in the string.
 

Sources/CronExpression.swift

@@ -37,10 +37,10 @@ public class CronExpression {
 		cronRepresentation = theCronRepresentation
 
 		let parts = cronRepresentation.cronParts
-		for i: Int in 0 ..< parts.count {
-			let field = CronField(rawValue: i)!
-			if field.getFieldChecker().validate(parts[i]) == false {
-				NSLog("\(#function): Invalid cron field value \(parts[i]) at position \(i)")
+		for index: Int in 0 ..< parts.count {
+			let field = CronField(rawValue: index)!
+			if field.getFieldChecker().validate(parts[index]) == false {
+				NSLog("\(#function): Invalid cron field value \(parts[index]) at position \(index)")
 				return nil
 			}
 		}

Sources/StringValidator.swift

@@ -29,7 +29,7 @@ struct StringValidator {
             typealias Regex = NSRegularExpression
         #endif
 
-        let regex = try! Regex(pattern: regex, options: [])
+        guard let regex = try? Regex(pattern: regex, options: []) else { return false }
         return regex.numberOfMatches(in: value, options: [], range: NSMakeRange(0, value.count)) > 0
     }
 }