1 files changed, 42 insertions, 0 deletions
diff --git a/container-core/src/test/java/com/yahoo/container/logging/CircularArrayAccessLogKeeperTest.java b/container-core/src/test/java/com/yahoo/container/logging/CircularArrayAccessLogKeeperTest.java
new file mode 100644
index 00000000000..5d9509eb045
--- /dev/null
+++ b/container-core/src/test/java/com/yahoo/container/logging/CircularArrayAccessLogKeeperTest.java
@@ -0,0 +1,42 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.container.logging;
+
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.hasItems;
+import static org.hamcrest.Matchers.contains;
+import static org.hamcrest.core.Is.is;
+import static org.hamcrest.core.IsCollectionContaining.hasItem;
+import static org.hamcrest.core.IsNot.not;
+import static org.junit.Assert.assertThat;
+
+public class CircularArrayAccessLogKeeperTest {
+    private CircularArrayAccessLogKeeper circularArrayAccessLogKeeper = new CircularArrayAccessLogKeeper();
+
+    @Test
+    public void testSizeIsCroppedCorrectly() {
+        for (int i = 0; i < CircularArrayAccessLogKeeper.SIZE - 1; i++) {
+            circularArrayAccessLogKeeper.addUri(String.valueOf(i));
+        }
+        assertThat(circularArrayAccessLogKeeper.getUris().size(), is(CircularArrayAccessLogKeeper.SIZE -1));
+        circularArrayAccessLogKeeper.addUri("foo");
+        assertThat(circularArrayAccessLogKeeper.getUris().size(), is(CircularArrayAccessLogKeeper.SIZE));
+        circularArrayAccessLogKeeper.addUri("bar");
+        assertThat(circularArrayAccessLogKeeper.getUris().size(), is(CircularArrayAccessLogKeeper.SIZE));
+        assertThat(circularArrayAccessLogKeeper.getUris(), hasItems("1", "2", "3", "foo", "bar"));
+        assertThat(circularArrayAccessLogKeeper.getUris(), not(hasItem("0")));
+    }
+
+    @Test
+    public void testEmpty() {
+        assertThat(circularArrayAccessLogKeeper.getUris().size(), is(0));
+    }
+
+    @Test
+    public void testSomeItems() {
+        circularArrayAccessLogKeeper.addUri("a");
+        circularArrayAccessLogKeeper.addUri("b");
+        circularArrayAccessLogKeeper.addUri("b");
+        assertThat(circularArrayAccessLogKeeper.getUris(), contains("a", "b", "b"));
+    }
+}