Add quotes to description where required (#86)

* Add tests for description with quotes
* Add quotes to description for values with commas

Co-authored-by: Christian Tietze <[email protected]>

Author: lukestringer90

SwiftCSV/Description.swift

@@ -11,10 +11,20 @@ import Foundation
 extension CSV: CustomStringConvertible {
     public var description: String {
         let head = header.joined(separator: ",") + "\n"
-        
         let cont = namedRows.map { row in
-            header.map { row[$0]! }.joined(separator: ",")
+            return header.map { key -> String in
+                let value = row[key]!
+                
+                // Add quotes if value contains a comma
+                if value.contains(",") {
+                    return "\"\(value)\""
+                }
+                return value
+                
+            }.joined(separator: ",")
+            
         }.joined(separator: "\n")
         return head + cont
     }
 }
+

SwiftCSVTests/CSVTests.swift

@@ -82,7 +82,12 @@ class CSVTests: XCTestCase {
     func testDescription() {
         XCTAssertEqual(csv.description, "id,name,age\n1,Alice,18\n2,Bob,19\n3,Charlie,20")
     }
-
+  
+    func testDescriptionWithDoubleQuotes() {
+        csv = try! CSV(string: "id,name,age\n1,\"Alice, In, Wonderland\",18\n2,Bob,19\n3,Charlie,20")
+        XCTAssertEqual(csv.description, "id,name,age\n1,\"Alice, In, Wonderland\",18\n2,Bob,19\n3,Charlie,20")
+    }
+  
     func testEnumerate() throws {
         let expected = [
             ["id": "1", "name": "Alice", "age": "18"],