circular array is fixed and tested

src/net/torvald/terrarum/tests/CircularArrayTest.kt

@@ -0,0 +1,47 @@
+import net.torvald.dataclass.CircularArray
+
+/**
+ * Created by minjaesong on 2019-01-09.
+ */
+class CircularArrayTest {
+
+    operator fun invoke() {
+        val testSet = CircularArray<Int?>(5)
+        val testSet2 = CircularArray<Int?>(5)
+
+        for (i in 1..5) {
+            testSet.add(i)
+        }
+
+        println("Metadata:")
+        println(testSet)
+        println("forEach():")
+        testSet.forEach { print("$it ") }
+        println("\nfold(0, sum):")
+        println(testSet.fold(0) { acc, v -> acc + (v ?: 0) })
+        println("Raw:")
+        testSet.buffer.forEach { print("$it ") }
+        println()
+
+        println()
+        for (i in 1..6) {
+            testSet2.add(i)
+        }
+
+        println("Metadata:")
+        println(testSet2)
+        println("forEach():")
+        testSet2.forEach { print("$it ") }
+        println("\nfold(0, sum):")
+        println(testSet2.fold(0) { acc, v -> acc + (v ?: 0) })
+        println("Raw:")
+        testSet2.buffer.forEach { print("$it ") }
+        println()
+
+    }
+
+}
+
+fun main(args: Array<String>) {
+    CircularArrayTest().invoke()
+}