Migrate mdbook_runs_renderers to BookTest

tests/testsuite/main.rs

@@ -13,6 +13,7 @@ mod playground;
 mod preprocessor;
 mod print;
 mod redirects;
+mod renderer;
 
 mod prelude {
     pub use crate::book_test::BookTest;

tests/testsuite/renderer.rs

@@ -1,10 +1,8 @@
-mod dummy_book;
+//! Tests for custom renderers.
 
-use crate::dummy_book::DummyBook;
-use mdbook::config::Config;
-use mdbook::errors::*;
+use crate::prelude::*;
+use mdbook::errors::Result;
 use mdbook::renderer::{RenderContext, Renderer};
-use mdbook::MDBook;
 use std::sync::{Arc, Mutex};
 
 struct Spy(Arc<Mutex<Inner>>);
@@ -26,14 +24,12 @@ impl Renderer for Spy {
     }
 }
 
+// Test that renderer gets run.
 #[test]
-fn mdbook_runs_renderers() {
+fn runs_renderers() {
+    let test = BookTest::init(|_| {});
     let spy: Arc<Mutex<Inner>> = Default::default();
-
-    let temp = DummyBook::new().build().unwrap();
-    let cfg = Config::default();
-
-    let mut book = MDBook::load_with_config(temp.path(), cfg).unwrap();
+    let mut book = test.load_book();
     book.with_renderer(Spy(Arc::clone(&spy)));
     book.build().unwrap();