From 20d42a53d3fabeff1c3ca687bb1d41cfa0850d37 Mon Sep 17 00:00:00 2001
From: Eric Huss <eric@huss.org>
Date: Mon, 21 Apr 2025 19:11:07 -0700
Subject: [PATCH] Migrate rendered_code_has_playground_stuff to BookTest

---
 tests/rendered_output.rs                       | 15 ---------------
 tests/testsuite/main.rs                        |  1 +
 tests/testsuite/playground.rs                  | 18 ++++++++++++++++++
 .../playground_on_rust_code/book.toml          |  2 ++
 .../playground_on_rust_code/src/SUMMARY.md     |  3 +++
 .../playground_on_rust_code/src/index.md       |  5 +++++
 6 files changed, 29 insertions(+), 15 deletions(-)
 create mode 100644 tests/testsuite/playground.rs
 create mode 100644 tests/testsuite/playground/playground_on_rust_code/book.toml
 create mode 100644 tests/testsuite/playground/playground_on_rust_code/src/SUMMARY.md
 create mode 100644 tests/testsuite/playground/playground_on_rust_code/src/index.md

diff --git a/tests/rendered_output.rs b/tests/rendered_output.rs
index a231bf16..8552d6f4 100644
--- a/tests/rendered_output.rs
+++ b/tests/rendered_output.rs
@@ -93,21 +93,6 @@ fn check_correct_relative_links_in_print_page() {
     );
 }
 
-#[test]
-fn rendered_code_has_playground_stuff() {
-    let temp = DummyBook::new().build().unwrap();
-    let md = MDBook::load(temp.path()).unwrap();
-    md.build().unwrap();
-
-    let nested = temp.path().join("book/first/nested.html");
-    let playground_class = vec![r#"class="playground""#];
-
-    assert_contains_strings(nested, &playground_class);
-
-    let book_js = temp.path().join("book/book.js");
-    assert_contains_strings(book_js, &[".playground"]);
-}
-
 #[test]
 fn rendered_code_does_not_have_playground_stuff_in_html_when_disabled_in_config() {
     let temp = DummyBook::new().build().unwrap();
diff --git a/tests/testsuite/main.rs b/tests/testsuite/main.rs
index e2a3ebd9..5b2d7db1 100644
--- a/tests/testsuite/main.rs
+++ b/tests/testsuite/main.rs
@@ -9,6 +9,7 @@ mod includes;
 mod index;
 mod init;
 mod markdown;
+mod playground;
 
 mod prelude {
     pub use crate::book_test::BookTest;
diff --git a/tests/testsuite/playground.rs b/tests/testsuite/playground.rs
new file mode 100644
index 00000000..5cbd7ab1
--- /dev/null
+++ b/tests/testsuite/playground.rs
@@ -0,0 +1,18 @@
+//! Tests for Rust playground support.
+
+use crate::prelude::*;
+
+// Verifies that a rust codeblock gets the playground class.
+#[test]
+fn playground_on_rust_code() {
+    BookTest::from_dir("playground/playground_on_rust_code").check_main_file(
+        "book/index.html",
+        str![[r##"
+<h1 id="rust-sample"><a class="header" href="#rust-sample">Rust Sample</a></h1>
+<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
+</span><span class="boring">fn main() {
+</span>let x = 1;
+<span class="boring">}</span></code></pre></pre>
+"##]],
+    );
+}
diff --git a/tests/testsuite/playground/playground_on_rust_code/book.toml b/tests/testsuite/playground/playground_on_rust_code/book.toml
new file mode 100644
index 00000000..7bf7c972
--- /dev/null
+++ b/tests/testsuite/playground/playground_on_rust_code/book.toml
@@ -0,0 +1,2 @@
+[book]
+title = "playground_on_rust_code"
diff --git a/tests/testsuite/playground/playground_on_rust_code/src/SUMMARY.md b/tests/testsuite/playground/playground_on_rust_code/src/SUMMARY.md
new file mode 100644
index 00000000..6f47d01a
--- /dev/null
+++ b/tests/testsuite/playground/playground_on_rust_code/src/SUMMARY.md
@@ -0,0 +1,3 @@
+# Summary
+
+- [Rust Playground](./index.md)
diff --git a/tests/testsuite/playground/playground_on_rust_code/src/index.md b/tests/testsuite/playground/playground_on_rust_code/src/index.md
new file mode 100644
index 00000000..93234d98
--- /dev/null
+++ b/tests/testsuite/playground/playground_on_rust_code/src/index.md
@@ -0,0 +1,5 @@
+# Rust Sample
+
+```rust
+let x = 1;
+```