Test Plantuml diagram generation

.travis.yml

@@ -5,6 +5,9 @@ jdk:
   - openjdk7
   - openjdk6
 before_script: unset GEM_PATH GEM_HOME JRUBY_OPTS
+before_install:
+  - sudo apt-get -qq update
+  - sudo apt-get install -y graphviz
 install: ./gradlew assemble
 script: ./gradlew -S check && bash test-asciidoctor-upstream.sh
 notifications:

appveyor.yml

@@ -15,6 +15,7 @@ install:
   - echo %PATH%
   - java -version
   - gradlew.bat --version
+  - cinst graphviz.portable
 build_script:
   - gradlew.bat -u -i assemble
 test_script:

asciidoctorj-distribution/src/test/java/org/asciidoctor/WhenPlantumlDiagramIsRendered.java

@@ -0,0 +1,82 @@
+package org.asciidoctor;
+
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+import java.util.UUID;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.Matchers.greaterThan;
+import static org.hamcrest.core.Is.is;
+import static org.junit.Assert.assertThat;
+
+public class WhenPlantumlDiagramIsRendered {
+
+    @ClassRule
+    public static TemporaryFolder tmp = new TemporaryFolder();
+
+    @Test
+    public void should_render_plantuml_diagram() throws Exception {
+        // given:
+        final String imageFileName = UUID.randomUUID().toString();
+        final String document = getTestDocument(imageFileName);
+
+        Asciidoctor asciidoctor = Asciidoctor.Factory.create();
+        asciidoctor.requireLibrary("asciidoctor-diagram");
+
+        // when:
+        final String result = asciidoctor.convert(
+            document,
+            OptionsBuilder.options()
+                .toFile(false)
+                .attributes(AttributesBuilder.attributes()
+                    .attribute("imagesoutdir", "build")));
+
+        // then:
+        assertThat(result, containsString("src=\"" + imageFileName + ".png\""));
+        assertThat("PNG file not created!", new File("build/" + imageFileName + ".png").exists(), is(true));
+        assertThat("PNG cache file not created!", new File("build/" + imageFileName + ".png.cache").exists(), is(true));
+    }
+
+    @Test
+    public void should_render_plantuml_diagram_to_PDF() throws Exception {
+        // given:
+        final String imageFileName = UUID.randomUUID().toString();
+
+        final File destinationFile = new File("build/plantuml.pdf");
+
+        final String document = getTestDocument(imageFileName);
+
+        Asciidoctor asciidoctor = Asciidoctor.Factory.create();
+        asciidoctor.requireLibrary("asciidoctor-diagram");
+
+        // when:
+        asciidoctor.convert(
+            document,
+            OptionsBuilder.options()
+                .backend("pdf")
+                .toFile(destinationFile)
+                .attributes(AttributesBuilder.attributes()
+                    .attribute("imagesoutdir", "build")));
+
+        // then:
+        assertThat(destinationFile.exists(), is(true));
+        assertThat(destinationFile.length(), greaterThan(0L));
+        assertThat("PNG file not created!", new File("build/" + imageFileName + ".png").exists(), is(true));
+        assertThat("PNG cache file not created!", new File("build/" + imageFileName + ".png.cache").exists(), is(true));
+    }
+
+    private String getTestDocument(String imageFileName) {
+        return "= Document Title\n" +
+            "\n" +
+            "Hello World\n" +
+            "\n" +
+            "[plantuml," + imageFileName + "]\n" +
+            "....\n" +
+            "A --|> B\n" +
+            "....\n" +
+            "\n";
+    }
+}