add unit test to make sure Localizable.strings files are syntactically correct

apple/OmnivoreKit/Sources/Views/LocalText.swift

@@ -2,9 +2,7 @@ import Foundation
 
 public enum LocalText {
   public static func localText(key: String, comment: String? = nil) -> String {
-    let string = NSLocalizedString(key, bundle: .module, comment: comment ?? "no comment provided by developer")
-    print(string)
-    return string
+    NSLocalizedString(key, bundle: .module, comment: comment ?? "no comment provided by developer")
   }
 
   // Share extension

apple/OmnivoreKit/Tests/ViewsTests/LocalTextTests.swift

@@ -0,0 +1,31 @@
+@testable import Views
+import XCTest
+
+final class LocalTextTests: XCTestCase {
+  func testThatLocalTextFindsStrings() {
+    // Make sure that the same key is not returned when looking up a localized string by key
+    // Testing the first and last entry in teh strings file is adequate for finding syntax errors.
+    // If any entry is not proper than the key will be returned and the test will fail.
+
+    // English (test default)
+    XCTAssertNotEqual(LocalText.saveArticleSavedState, "saveArticleSavedState")
+    XCTAssertNotEqual(LocalText.errorNetwork, "errorNetwork")
+
+    // Simple Chinese
+    XCTAssertNotEqual(simpleChineseText(key: "saveArticleSavedState"), "saveArticleSavedState")
+    XCTAssertNotEqual(simpleChineseText(key: "errorNetwork"), "errorNetwork")
+  }
+
+  private func simpleChineseText(key: String) -> String {
+    guard
+      let bundlePath = Bundle.module.path(forResource: "zh-Hans", ofType: "lproj"),
+      let bundle = Bundle(path: bundlePath)
+    else { return key }
+
+    return NSLocalizedString(key, bundle: bundle, comment: "")
+  }
+
+  static var allTests = [
+    ("testThatLocalTextFindsStrings", testThatLocalTextFindsStrings)
+  ]
+}