Added some test for performance

- ImageTest PNG,GIF,JPG
- Ignore jenv's .java-version

Author: asturio

.gitignore

@@ -13,6 +13,8 @@ local.properties
 .recommenders
 .project
 .classpath
+# If you use jenv
+.java-version
 
 # External tool builders
 .externalToolBuilders/

openpdf/src/test/java/com/lowagie/text/ImageTest.java

@@ -1,20 +1,68 @@
 package com.lowagie.text;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
+import java.io.IOException;
 import org.junit.jupiter.api.Test;
 
 class ImageTest {
 
-  @Test
-  void shouldReturnImageWithUrlForUrl() throws Exception {
-    final Image image = Image.getInstance(ClassLoader.getSystemResource("H.gif"));
-    assertNotNull(image.getUrl());
-  }
-
-  @Test
-  void shouldReturnImageWithUrlForPath() throws Exception {
-    final Image image = Image.getInstance(ClassLoader.getSystemResource("H.gif").getPath());
-    assertNotNull(image.getUrl());
-  }
+    // For performance testing, set this to something > 100
+    private static final int PERFORMANCE_ITERATIONS = 1;
+
+    @Test
+    void shouldReturnImageWithUrlForUrl() throws Exception {
+        final Image image = Image.getInstance(ClassLoader.getSystemResource("H.gif"));
+        assertNotNull(image.getUrl());
+    }
+
+    @Test
+    void shouldReturnImageWithUrlForPath() throws Exception {
+        final Image image = Image.getInstance(ClassLoader.getSystemResource("H.gif").getPath());
+        assertNotNull(image.getUrl());
+    }
+
+    @Test
+    void performanceTestPng() throws IOException {
+        long start = System.nanoTime();
+        Image image = null;
+        for (int i = 0; i < PERFORMANCE_ITERATIONS; i++) {
+            image = Image.getInstance(ClassLoader.getSystemResource("imageTest/ImageTest.png").getPath());
+        }
+        long deltaMillis = (System.nanoTime() - start) / 1_000_000 / PERFORMANCE_ITERATIONS;
+        if (PERFORMANCE_ITERATIONS > 1) {
+            System.out.format("Load PNG ~time after %d iterations %d ms%n", PERFORMANCE_ITERATIONS, deltaMillis);
+        }
+        assertNotNull(image.getUrl());
+    }
+
+    @Test
+    void performanceTestJpg() throws IOException {
+        long start = System.nanoTime();
+        Image image = null;
+        for (int i = 0; i < PERFORMANCE_ITERATIONS; i++) {
+            image = Image.getInstance(ClassLoader.getSystemResource("imageTest/ImageTest.jpg").getPath());
+        }
+        long deltaMillis = (System.nanoTime() - start) / 1_000_000 / PERFORMANCE_ITERATIONS;
+        if (PERFORMANCE_ITERATIONS > 1) {
+            System.out.format("Load JPG ~time after %d iterations %d ms%n", PERFORMANCE_ITERATIONS, deltaMillis);
+        }
+        assertNotNull(image.getUrl());
+    }
+
+    @Test
+    void performanceTestGif() throws IOException {
+        long start = System.nanoTime();
+        Image image = null;
+        for (int i = 0; i < PERFORMANCE_ITERATIONS; i++) {
+            image = Image.getInstance(ClassLoader.getSystemResource("imageTest/ImageTest.gif").getPath());
+        }
+        long deltaMillis = (System.nanoTime() - start) / 1_000_000 / PERFORMANCE_ITERATIONS;
+        if (PERFORMANCE_ITERATIONS > 1) {
+            System.out.format("Load GIF ~time after %d iterations %d ms%n", PERFORMANCE_ITERATIONS, deltaMillis);
+        }
+        assertThat(deltaMillis).isLessThan(200);
+        assertNotNull(image.getUrl());
+    }
 }