From 3fce1151dd9a4448a3f9822f0ba43da7f428c302 Mon Sep 17 00:00:00 2001
From: Eric Huss <eric@huss.org>
Date: Tue, 22 Apr 2025 08:55:24 -0700
Subject: [PATCH] Migrate
 first_chapter_is_copied_as_index_even_if_not_first_elem to BookTest

---
 tests/rendered_output.rs                      | 15 --------------
 tests/testsuite/rendering.rs                  | 20 +++++++++++++++++++
 .../src/SUMMARY.md                            | 11 ++++++++++
 3 files changed, 31 insertions(+), 15 deletions(-)
 create mode 100644 tests/testsuite/rendering/first_chapter_is_copied_as_index_even_if_not_first_elem/src/SUMMARY.md

diff --git a/tests/rendered_output.rs b/tests/rendered_output.rs
index c935fae0..d16c7a3f 100644
--- a/tests/rendered_output.rs
+++ b/tests/rendered_output.rs
@@ -271,21 +271,6 @@ fn example_book_can_build() {
     md.build().unwrap();
 }
 
-#[test]
-fn first_chapter_is_copied_as_index_even_if_not_first_elem() {
-    let temp = DummyBook::new().build().unwrap();
-    let mut cfg = Config::default();
-    cfg.set("book.src", "index_html_test")
-        .expect("Couldn't set config.book.src to \"index_html_test\"");
-    let md = MDBook::load_with_config(temp.path(), cfg).unwrap();
-    md.build().unwrap();
-
-    let root = temp.path().join("book");
-    let chapter = fs::read_to_string(root.join("chapter_1.html")).expect("read chapter 1");
-    let index = fs::read_to_string(root.join("index.html")).expect("read index");
-    pretty_assertions::assert_eq!(chapter, index);
-}
-
 #[test]
 fn theme_dir_overrides_work_correctly() {
     let book_dir = dummy_book::new_copy_of_example_book().unwrap();
diff --git a/tests/testsuite/rendering.rs b/tests/testsuite/rendering.rs
index 750e27dd..1d6cf476 100644
--- a/tests/testsuite/rendering.rs
+++ b/tests/testsuite/rendering.rs
@@ -21,3 +21,23 @@ fn edit_url_template_explicit_src() {
          title=\"Suggest an edit\" aria-label=\"Suggest an edit\">",
     );
 }
+
+// Checks that index.html is generated correctly, even when the first few
+// chapters are drafts.
+#[test]
+fn first_chapter_is_copied_as_index_even_if_not_first_elem() {
+    BookTest::from_dir("rendering/first_chapter_is_copied_as_index_even_if_not_first_elem")
+        // These two files should be equal.
+        .check_main_file(
+            "book/chapter_1.html",
+            str![[
+                r##"<h1 id="chapter-1"><a class="header" href="#chapter-1">Chapter 1</a></h1>"##
+            ]],
+        )
+        .check_main_file(
+            "book/index.html",
+            str![[
+                r##"<h1 id="chapter-1"><a class="header" href="#chapter-1">Chapter 1</a></h1>"##
+            ]],
+        );
+}
diff --git a/tests/testsuite/rendering/first_chapter_is_copied_as_index_even_if_not_first_elem/src/SUMMARY.md b/tests/testsuite/rendering/first_chapter_is_copied_as_index_even_if_not_first_elem/src/SUMMARY.md
new file mode 100644
index 00000000..37bf68cd
--- /dev/null
+++ b/tests/testsuite/rendering/first_chapter_is_copied_as_index_even_if_not_first_elem/src/SUMMARY.md
@@ -0,0 +1,11 @@
+# Summary
+
+---
+
+- [None of these should be treated as the "index chapter"]()
+
+# Part 1
+
+- [Not this either]()
+- [Chapter 1](./chapter_1.md)
+- [And not this]()