Initial.

kotlin-textfiles-skeleton/src/test/kotlin/textfiles/Question4Tests.kt

@@ -0,0 +1,36 @@
+package textfiles
+
+/*
+import java.util.Random
+import kotlin.test.Test
+import kotlin.test.assertEquals
+ */
+
+class Question4Tests {
+/*
+    @Test
+    fun concurrencyTest() {
+        for (repeat in 1..20) {
+            println("Repeat run $repeat")
+            val initialText = "initialtext"
+            val authorStrings: List<List<String>> = (0..<8).map {
+                (0..<1000).map {
+                    (0..it % 10).map { number -> number.toString() }.joinToString(separator = "")
+                }
+            }
+            val expectedOutput: String =
+                (initialText + authorStrings.flatten().joinToString(separator = ""))
+                    .toCharArray().sortedArray().joinToString(separator = "")
+
+            val singleStringTextFile = SingleStringTextFile(initialText)
+
+            // TODO - complete this test
+
+            assertEquals(
+                expectedOutput,
+                threadSafeTextFile.toString().toCharArray().sortedArray().joinToString(separator = ""),
+            )
+        }
+    }
+ */
+}