1 files changed, 96 insertions, 0 deletions
diff --git a/vespajlib/src/test/java/com/yahoo/text/LowercaseTestCase.java b/vespajlib/src/test/java/com/yahoo/text/LowercaseTestCase.java
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+++ b/vespajlib/src/test/java/com/yahoo/text/LowercaseTestCase.java
@@ -0,0 +1,96 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.text;
+
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.util.Locale;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+/**
+ * @author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
+ * @since 5.1.14
+ */
+public class LowercaseTestCase {
+
+    @Test
+    public void testAZ() {
+        {
+            String lowercase = Lowercase.toLowerCase("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
+            assertThat(lowercase, equalTo("abcdefghijklmnopqrstuvwxyz"));
+        }
+        {
+            String lowercase = Lowercase.toLowerCase("abcdefghijklmnopqrstuvwxyz");
+            assertThat(lowercase, equalTo("abcdefghijklmnopqrstuvwxyz"));
+        }
+        {
+            String lowercase = Lowercase.toLowerCase("AbCDEfGHIJklmnoPQRStuvwXyz");
+            assertThat(lowercase, equalTo("abcdefghijklmnopqrstuvwxyz"));
+        }
+
+        {
+            String lowercase = Lowercase.toLowerCase("@+#");
+            assertThat(lowercase, equalTo("@+#"));
+        }
+        {
+            String lowercase = Lowercase.toLowerCase("[]");
+            assertThat(lowercase, equalTo("[]"));
+        }
+        {
+            String lowercase = Lowercase.toLowerCase("{}");
+            assertThat(lowercase, equalTo("{}"));
+        }
+        {
+            String lowercase = Lowercase.toLowerCase("\u00cd\u00f4");
+            assertThat(lowercase, equalTo("\u00ed\u00f4"));
+        }
+    }
+
+    @Test
+    @Ignore
+    public void performance() {
+        Lowercase.toLowerCase("warmup");
+        String lowercaseInput = "abcdefghijklmnopqrstuvwxyz";
+        String uppercaseInput = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+        String mixedcaseInput = "AbCDEfGHIJklmnoPQRStuvwXyz";
+
+        System.err.println("Lowercase input: ");
+        testPerformance(lowercaseInput);
+
+        System.err.println("Uppercase input: ");
+        testPerformance(uppercaseInput);
+
+        System.err.println("Mixed-case input: ");
+        testPerformance(mixedcaseInput);
+    }
+
+    private void testPerformance(String input) {
+        final int NUM = 10000000;
+        long elapsedTimeOwnImpl;
+        {
+            long startTimeOwnImpl = System.currentTimeMillis();
+            for (int i = 0; i < NUM; i++) {
+                Lowercase.toLowerCase(input);
+            }
+            elapsedTimeOwnImpl = System.currentTimeMillis() - startTimeOwnImpl;
+            System.err.println("Own implementation: " + elapsedTimeOwnImpl);
+        }
+
+        long elapsedTimeJava;
+        {
+            long startTimeJava = System.currentTimeMillis();
+            for (int i = 0; i < NUM; i++) {
+                input.toLowerCase(Locale.ENGLISH);
+            }
+            elapsedTimeJava = System.currentTimeMillis() - startTimeJava;
+            System.err.println("Java's implementation: " + elapsedTimeJava);
+        }
+
+        long diff = elapsedTimeJava - elapsedTimeOwnImpl;
+        double diffPercentage = (((double) diff) / ((double) elapsedTimeJava)) * 100.0;
+        System.err.println("Own implementation is " + diffPercentage + " % faster.");
+
+    }
+}