Migrate mdbook_test_chapter to BookTest

tests/testing.rs

@@ -4,19 +4,6 @@ use crate::dummy_book::DummyBook;
 
 use mdbook::MDBook;
 
-#[test]
-fn mdbook_test_chapter() {
-    let temp = DummyBook::new().with_passing_test(true).build().unwrap();
-    let mut md = MDBook::load(temp.path()).unwrap();
-
-    let result = md.test_chapter(vec![], Some("Introduction"));
-    assert!(
-        result.is_ok(),
-        "test_chapter failed with {}",
-        result.err().unwrap()
-    );
-}
-
 #[test]
 fn mdbook_test_chapter_not_found() {
     let temp = DummyBook::new().with_passing_test(true).build().unwrap();

tests/testsuite/test.rs

@@ -53,3 +53,24 @@ failing!
 "#]]);
     });
 }
+
+// Test with a specific chapter.
+#[test]
+fn test_individual_chapter() {
+    let mut test = BookTest::from_dir("test/passing_tests");
+    test.run("test -c", |cmd| {
+        cmd.args(&["Passing 1"])
+            .expect_stdout(str![[""]])
+            .expect_stderr(str![[r#"
+[TIMESTAMP] [INFO] (mdbook::book): Testing chapter 'Passing 1': "passing1.md"
+
+"#]]);
+    })
+    // Can also be a source path.
+    .run("test -c passing2.md", |cmd| {
+        cmd.expect_stdout(str![[""]]).expect_stderr(str![[r#"
+[TIMESTAMP] [INFO] (mdbook::book): Testing chapter 'Passing 2': "passing2.md"
+
+"#]]);
+    });
+}