Replace empty table in HTML report by messages (#833)

3 files changed, 50 insertions, 0 deletions

diff --git a/org.jacoco.doc/docroot/doc/changes.html b/org.jacoco.doc/docroot/doc/changes.html
index c8334399..e673eb5f 100644
--- a/org.jacoco.doc/docroot/doc/changes.html
+++ b/org.jacoco.doc/docroot/doc/changes.html
@@ -51,6 +51,9 @@
       (GitHub <a href="https://github.com/jacoco/jacoco/issues/818">#818</a>).</li>
   <li>HTML report shows message when analyzed class does not match executed
       (GitHub <a href="https://github.com/jacoco/jacoco/issues/819">#819</a>).</li>
+  <li>HTML report shows message when no class files specified and when
+      none of the analyzed classes contain code relevant for code coverage
+      (GitHub <a href="https://github.com/jacoco/jacoco/issues/833">#833</a>).</li>
   <li>Empty class and sourcefile nodes are preserved and available in XML report
       (GitHub <a href="https://github.com/jacoco/jacoco/issues/817">#817</a>).</li>
   <li>Agent avoids conflicts with other agents when running on Java 9+
diff --git a/org.jacoco.report.test/src/org/jacoco/report/internal/html/page/BundlePageTest.java b/org.jacoco.report.test/src/org/jacoco/report/internal/html/page/BundlePageTest.java
index 5b2f943e..716249cf 100644
--- a/org.jacoco.report.test/src/org/jacoco/report/internal/html/page/BundlePageTest.java
+++ b/org.jacoco.report.test/src/org/jacoco/report/internal/html/page/BundlePageTest.java
@@ -74,4 +74,38 @@ public class BundlePageTest extends PageTestBase {
 				support.findStr(doc, "count(/html/body/table[1]/tbody/tr)"));
 	}
 
+	@Test
+	public void should_render_message_when_no_class_files_specified()
+			throws Exception {
+		final IBundleCoverage node = new BundleCoverageImpl("bundle",
+				Collections.<IPackageCoverage> emptySet());
+
+		final BundlePage page = new BundlePage(node, null, null, rootFolder,
+				context);
+		page.render();
+
+		final Document doc = support.parse(output.getFile("index.html"));
+		assertEquals("No class files specified.",
+				support.findStr(doc, "/html/body/p"));
+	}
+
+	@Test
+	public void should_render_message_when_all_classes_empty()
+			throws Exception {
+		final ClassCoverageImpl emptyClass = new ClassCoverageImpl(
+				"example/Class", 0, false);
+		final IBundleCoverage node = new BundleCoverageImpl("bundle",
+				Collections.<IClassCoverage> singleton(emptyClass),
+				Collections.<ISourceFileCoverage> emptySet());
+
+		final BundlePage page = new BundlePage(node, null, null, rootFolder,
+				context);
+		page.render();
+
+		final Document doc = support.parse(output.getFile("index.html"));
+		assertEquals(
+				"None of the analyzed classes contain code relevant for code coverage.",
+				support.findStr(doc, "/html/body/p"));
+	}
+
 }
diff --git a/org.jacoco.report/src/org/jacoco/report/internal/html/page/BundlePage.java b/org.jacoco.report/src/org/jacoco/report/internal/html/page/BundlePage.java
index 55840db0..403269c9 100644
--- a/org.jacoco.report/src/org/jacoco/report/internal/html/page/BundlePage.java
+++ b/org.jacoco.report/src/org/jacoco/report/internal/html/page/BundlePage.java
@@ -18,6 +18,7 @@ import org.jacoco.core.analysis.ICoverageNode;
 import org.jacoco.core.analysis.IPackageCoverage;
 import org.jacoco.report.ISourceFileLocator;
 import org.jacoco.report.internal.ReportOutputFolder;
+import org.jacoco.report.internal.html.HTMLElement;
 import org.jacoco.report.internal.html.IHTMLReportContext;
 
 /**
@@ -85,4 +86,16 @@ public class BundlePage extends TablePage<ICoverageNode> {
 		return "index.html";
 	}
 
+	@Override
+	protected void content(HTMLElement body) throws IOException {
+		if (bundle.getPackages().isEmpty()) {
+			body.p().text("No class files specified.");
+		} else if (bundle.isEmpty()) {
+			body.p().text(
+					"None of the analyzed classes contain code relevant for code coverage.");
+		} else {
+			super.content(body);
+		}
+	}
+
 }