 
 class StringDictionaryTests: XCTestCase {
 
-    let DictionaryTextFilename = "example-dictionary"
-    var wordDictionary: StringDictionary!
+    private let DictionaryTextFilename = "example-dictionary"
+    private var wordDictionary: StringDictionary!
 
     override func setUp() {
         wordDictionary = StringDictionary(withTextFilepath: StringSearchKitTestHelper.exampleFilepath)

        
        XCTAssertTrue(wordDictionary.contains(string: "alt"))
        XCTAssertTrue(wordDictionary.contains(string: "alice"))
    }
    
    // MARK:- Case preservation

private extension StringDictionaryTests {
    
    func allWords() -> [String] {
        return [
            "activate",
            "alt",
            "as",
            "deactivate",
            "else",
            "end",
            "loop",
            "neg",
            "note",
            "opt",
            "par",
            "participant",
            "region"
        ]
    }
}
