From a2a1ed9ba280cc0cb1edf4f7dba03e4e624086ff Mon Sep 17 00:00:00 2001
From: Andrei Solntsev <andrei.solntsev@gmail.com>
Date: Tue, 6 Aug 2024 21:47:30 +0300
Subject: [PATCH] #359 add tests for HTMLOutline

---
 .../org/xhtmlrenderer/pdf/HTMLOutline.java    | 40 +++++++++----------
 .../xhtmlrenderer/pdf/HTMLOutlineTest.java    | 39 ++++++++++++++++++
 2 files changed, 59 insertions(+), 20 deletions(-)
 create mode 100644 flying-saucer-pdf/src/test/java/org/xhtmlrenderer/pdf/HTMLOutlineTest.java

diff --git a/flying-saucer-pdf/src/main/java/org/xhtmlrenderer/pdf/HTMLOutline.java b/flying-saucer-pdf/src/main/java/org/xhtmlrenderer/pdf/HTMLOutline.java
index 4c87601bb..687ce6d2b 100644
--- a/flying-saucer-pdf/src/main/java/org/xhtmlrenderer/pdf/HTMLOutline.java
+++ b/flying-saucer-pdf/src/main/java/org/xhtmlrenderer/pdf/HTMLOutline.java
@@ -35,24 +35,21 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import static java.util.regex.Pattern.CASE_INSENSITIVE;
+
 class HTMLOutline {
 
-    private static final Pattern HEADING =
-            Pattern.compile("h(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern HEADING = Pattern.compile("h(\\d+)", CASE_INSENSITIVE);
 
     /** <a href="https://www.w3.org/TR/html51/sections.html#sectioning-roots">sectioning roots</a> */
-    private static final Pattern ROOT =
-            Pattern.compile("blockquote|details|fieldset|figure|td",
-                            Pattern.CASE_INSENSITIVE);
+    private static final Pattern ROOT = Pattern.compile("blockquote|details|fieldset|figure|td", CASE_INSENSITIVE);
 
     private static final Pattern WS = Pattern.compile("\\s+");
 
     private static final int MAX_NAME_LENGTH = 200;
 
     private final HTMLOutline parent;
-
     private final int level;
-
     private final Bookmark bookmark;
 
     private HTMLOutline() {
@@ -160,7 +157,7 @@ public static List<Bookmark> generate(Element context, Box box) {
                 if (level < 1) {
                     continue; // Illegal value
                 }
-            } catch (NumberFormatException e) {
+            } catch (NumberFormatException ignore) {
                 continue; // Invalid value
             }
 
@@ -174,7 +171,7 @@ public static List<Bookmark> generate(Element context, Box box) {
         }
         initBoxRefs(map, box);
         return root.bookmark.getChildren();
-    } // generate(Element, Box) : List<Bookmark>
+    }
 
     private static void initBoxRefs(Map<Element,Bookmark> map, Box box) {
         Bookmark bookmark = map.get(box.getElement());
@@ -198,19 +195,22 @@ private static String getBookmarkName(Element element) {
         return name;
     }
 
-    static String getOutlineLevel(Element element) {
+    private static String getOutlineLevel(Element element) {
         String bookmark = element.getAttribute("data-pdf-bookmark").trim();
-        if (bookmark.isEmpty()) {
-            Matcher heading = HEADING.matcher(element.getTagName());
-            if (heading.matches()) {
-                bookmark = heading.group(1);
-            } else if (ROOT.matcher(element.getTagName()).matches()) {
-                bookmark = "exclude";
-            } else {
-                bookmark = "none";
-            }
+        return bookmark.isEmpty() ?
+                getOutlineLevelFromTagName(element.getTagName()) :
+                bookmark;
+    }
+
+    static String getOutlineLevelFromTagName(String tagName) {
+        Matcher heading = HEADING.matcher(tagName);
+        if (heading.matches()) {
+            return heading.group(1);
+        } else if (ROOT.matcher(tagName).matches()) {
+            return "exclude";
+        } else {
+            return "none";
         }
-        return bookmark;
     }
 
 
diff --git a/flying-saucer-pdf/src/test/java/org/xhtmlrenderer/pdf/HTMLOutlineTest.java b/flying-saucer-pdf/src/test/java/org/xhtmlrenderer/pdf/HTMLOutlineTest.java
new file mode 100644
index 000000000..23fb9a888
--- /dev/null
+++ b/flying-saucer-pdf/src/test/java/org/xhtmlrenderer/pdf/HTMLOutlineTest.java
@@ -0,0 +1,39 @@
+package org.xhtmlrenderer.pdf;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.xhtmlrenderer.pdf.HTMLOutline.getOutlineLevelFromTagName;
+
+class HTMLOutlineTest {
+    @Test
+    void getsOutlineLevelFromTagName_header() {
+        assertThat(getOutlineLevelFromTagName("h1")).isEqualTo("1");
+        assertThat(getOutlineLevelFromTagName("H2")).isEqualTo("2");
+        assertThat(getOutlineLevelFromTagName("h3")).isEqualTo("3");
+        assertThat(getOutlineLevelFromTagName("H6")).isEqualTo("6");
+        assertThat(getOutlineLevelFromTagName("h7")).isEqualTo("7");
+        assertThat(getOutlineLevelFromTagName("h10")).isEqualTo("10");
+        assertThat(getOutlineLevelFromTagName("h16")).isEqualTo("16");
+        assertThat(getOutlineLevelFromTagName("h99")).isEqualTo("99");
+    }
+
+    @Test
+    void getsOutlineLevelFromTagName_exclude() {
+        assertThat(getOutlineLevelFromTagName("blockquote")).isEqualTo("exclude");
+        assertThat(getOutlineLevelFromTagName("BLOCKQUOTE")).isEqualTo("exclude");
+        assertThat(getOutlineLevelFromTagName("details")).isEqualTo("exclude");
+        assertThat(getOutlineLevelFromTagName("fieldset")).isEqualTo("exclude");
+        assertThat(getOutlineLevelFromTagName("figure")).isEqualTo("exclude");
+        assertThat(getOutlineLevelFromTagName("td")).isEqualTo("exclude");
+        assertThat(getOutlineLevelFromTagName("TD")).isEqualTo("exclude");
+    }
+
+    @Test
+    void getsOutlineLevelFromTagName_none() {
+        assertThat(getOutlineLevelFromTagName("div")).isEqualTo("none");
+        assertThat(getOutlineLevelFromTagName("table")).isEqualTo("none");
+        assertThat(getOutlineLevelFromTagName("span")).isEqualTo("none");
+        assertThat(getOutlineLevelFromTagName("SPAN")).isEqualTo("none");
+    }
+}