+ Updated tests to verify file permission on extraction

+Added test file  for the permissions test case

Zip.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		303B4F6E1E4CBE5000DC1633 /* permissions.zip in Resources */ = {isa = PBXBuildFile; fileRef = 303B4F6D1E4CBE5000DC1633 /* permissions.zip */; };
 		342545901CE525B200336074 /* Zip.swift in Sources */ = {isa = PBXBuildFile; fileRef = 347E3AD71C1E04C900A11FD3 /* Zip.swift */; };
 		342545921CE525B200336074 /* unzip.c in Sources */ = {isa = PBXBuildFile; fileRef = 342FC0EB1C5044DC0023A3C3 /* unzip.c */; };
 		342545941CE525B200336074 /* QuickZip.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3443A3F51C4AB8A3004AD173 /* QuickZip.swift */; };
@@ -69,6 +70,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		303B4F6D1E4CBE5000DC1633 /* permissions.zip */ = {isa = PBXFileReference; lastKnownFileType = archive.zip; path = permissions.zip; sourceTree = "<group>"; };
 		342545B51CE525B200336074 /* Zip.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Zip.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		342FC0E71C5044DC0023A3C3 /* crypt.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = crypt.h; sourceTree = "<group>"; };
 		342FC0E81C5044DC0023A3C3 /* ioapi.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = ioapi.c; sourceTree = "<group>"; };
@@ -194,6 +196,7 @@
 		347E3A821C1DFFB500A11FD3 /* ZipTests */ = {
 			isa = PBXGroup;
 			children = (
+				303B4F6D1E4CBE5000DC1633 /* permissions.zip */,
 				34940A221C58876200D41574 /* 3crBXeO.gif */,
 				34940A231C58876200D41574 /* kYkLkPf.gif */,
 				3443A3FC1C4AD199004AD173 /* bb8.zip */,
@@ -415,6 +418,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				303B4F6E1E4CBE5000DC1633 /* permissions.zip in Resources */,
 				34940A251C58876200D41574 /* kYkLkPf.gif in Resources */,
 				3443A3FD1C4AD199004AD173 /* bb8.zip in Resources */,
 				34940A241C58876200D41574 /* 3crBXeO.gif in Resources */,

ZipTests/ZipTests.swift

@@ -217,6 +217,29 @@ class ZipTests: XCTestCase {
         }
     }
 
+    func testUnzipPermissions() {
+        do {
+            let permissionsURL = Bundle(for: ZipTests.self).url(forResource: "permissions", withExtension: "zip")!
+            let unzipDestination = try Zip.quickUnzipFile(permissionsURL)
+            let fileManager = FileManager.default
+            let permission777 = unzipDestination.appendingPathComponent("permission_777").appendingPathExtension("txt")
+            let permission600 = unzipDestination.appendingPathComponent("permission_600").appendingPathExtension("txt")
+            let permission604 = unzipDestination.appendingPathComponent("permission_604").appendingPathExtension("txt")
+            
+            do {
+                let attributes777 = try fileManager.attributesOfItem(atPath: permission777.path)
+                let attributes600 = try fileManager.attributesOfItem(atPath: permission600.path)
+                let attributes604 = try fileManager.attributesOfItem(atPath: permission604.path)
+                XCTAssertEqual(attributes777[.posixPermissions] as? Int, 0o777)
+                XCTAssertEqual(attributes600[.posixPermissions] as? Int, 0o600)
+                XCTAssertEqual(attributes604[.posixPermissions] as? Int, 0o604)
+            } catch {
+                XCTFail("Failed to get file attributes \(error)")
+            }
+        } catch {
+            XCTFail("Failed extract permissions.zip")
+        }
+    }
     
     func testQuickUnzipSubDir() {
         do {