1 files changed, 37 insertions, 0 deletions
diff --git a/testutil/src/main/java/com/yahoo/test/TotalOrderTester.java b/testutil/src/main/java/com/yahoo/test/TotalOrderTester.java
new file mode 100644
index 00000000000..bc9bb1494fa
--- /dev/null
+++ b/testutil/src/main/java/com/yahoo/test/TotalOrderTester.java
@@ -0,0 +1,37 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.hamcrest.Matchers.lessThanOrEqualTo;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+
+/**
+ * TotalOrderTester implements a total order test for OrderTester
+ *
+ * Usage:
+ * <code>
+ * new TotalOrderTester&lt;Integer&gt;()
+ *      .theseObjects(3, 3)
+ *      .areLessThan(4)
+ *      .areLessThan(5)
+ *      .areLessThan(6)
+ *      .testOrdering();
+ * </code>
+ *
+ * @author Vegard Sjonfjell
+ */
+
+public class TotalOrderTester<T extends Comparable<T>> extends OrderTester<T> {
+    protected void lessTest(T a, T b) throws AssertionError {
+        assertThat(a + " must be less than " + b, a.compareTo(b), lessThanOrEqualTo(-1));
+    }
+
+    protected void greaterTest(T a, T b) throws AssertionError {
+        assertThat(a + " must be greater than " + b, a.compareTo(b), greaterThanOrEqualTo(1));
+    }
+
+    protected void equalTest(T a, T b) throws AssertionError {
+        assertThat(a + " must be compared equal to " + b, a.compareTo(b), is(0));
+    }
+}