add tests specific to MDBook::load and friends

tests/load.rs

@@ -0,0 +1,176 @@
+mod dummy_book;
+
+use crate::dummy_book::{assert_contains_strings, DummyBook};
+use mdbook::book::parse_summary;
+use mdbook::book::{Summary, SummaryItem};
+use mdbook::config::Config;
+use mdbook::utils::fs::write_file;
+use mdbook::MDBook;
+use std::fs;
+use std::fs::File;
+use std::io::Read;
+
+#[test]
+fn load_with_default_config() {
+    let temp = DummyBook::new().build().unwrap();
+    assert!(!temp.path().join("book.toml").exists());
+
+    let md = MDBook::load(temp.path()).unwrap();
+
+    md.build().unwrap();
+
+    let index_html = temp.path().join("book").join("index.html");
+    assert_contains_strings(index_html, &vec![r#"<title>Dummy Book</title>"#]);
+}
+
+#[test]
+fn load_with_book_toml_implicit() {
+    let temp = DummyBook::new().build().unwrap();
+
+    let book_toml = r#"
+[book]
+title = "implicit"
+    "#;
+
+    write_file(&temp.path(), "book.toml", book_toml.as_bytes()).unwrap();
+
+    assert!(temp.path().join("book.toml").exists());
+
+    let md = MDBook::load(temp.path()).unwrap();
+
+    md.build().unwrap();
+
+    let index_html = temp.path().join("book").join("index.html");
+    assert_contains_strings(index_html, &vec![r#"<title>Dummy Book - implicit</title>"#]);
+}
+
+#[test]
+fn load_with_book_toml_explicit() {
+    let temp = DummyBook::new().build().unwrap();
+
+    let book_toml = r#"
+[book]
+title = "explicit"
+    "#;
+
+    write_file(&temp.path(), "book.toml", book_toml.as_bytes()).unwrap();
+
+    assert!(temp.path().join("book.toml").exists());
+
+    let md = MDBook::load_with_config_file(temp.path(), &temp.path().join("book.toml")).unwrap();
+
+    md.build().unwrap();
+
+    let index_html = temp.path().join("book").join("index.html");
+    assert_contains_strings(index_html, &vec![r#"<title>Dummy Book - explicit</title>"#]);
+}
+
+#[test]
+fn load_with_alternate_toml() {
+    let temp = DummyBook::new().build().unwrap();
+
+    let alternate_toml = r#"
+[book]
+title = "alternate"
+    "#;
+
+    write_file(&temp.path(), "not-book.toml", alternate_toml.as_bytes()).unwrap();
+
+    assert!(!temp.path().join("book.toml").exists());
+    assert!(temp.path().join("not-book.toml").exists());
+
+    let md =
+        MDBook::load_with_config_file(temp.path(), &temp.path().join("not-book.toml")).unwrap();
+
+    md.build().unwrap();
+
+    let index_html = temp.path().join("book").join("index.html");
+    assert_contains_strings(
+        index_html,
+        &vec![r#"<title>Dummy Book - alternate</title>"#],
+    );
+}
+
+#[test]
+fn load_with_alternate_toml_with_book_toml_present() {
+    let temp = DummyBook::new().build().unwrap();
+
+    let book_toml = r#"
+[book]
+title = "book"
+    "#;
+
+    write_file(&temp.path(), "book.toml", book_toml.as_bytes()).unwrap();
+
+    let alternate_toml = r#"
+[book]
+title = "not book"
+    "#;
+
+    write_file(&temp.path(), "not-book.toml", alternate_toml.as_bytes()).unwrap();
+
+    assert!(temp.path().join("book.toml").exists());
+    assert!(temp.path().join("not-book.toml").exists());
+
+    let md =
+        MDBook::load_with_config_file(temp.path(), &temp.path().join("not-book.toml")).unwrap();
+
+    md.build().unwrap();
+
+    let index_html = temp.path().join("book").join("index.html");
+    assert_contains_strings(index_html, &vec![r#"<title>Dummy Book - not book</title>"#]);
+}
+
+#[test]
+fn load_with_config_default() {
+    let temp = DummyBook::new().build().unwrap();
+    let cfg = Config::default();
+
+    let md = MDBook::load_with_config(temp.path(), cfg).unwrap();
+    md.build().unwrap();
+
+    let index_html = temp.path().join("book").join("index.html");
+    assert_contains_strings(index_html, &vec![r#"<title>Dummy Book</title>"#]);
+}
+
+#[test]
+fn load_with_config_from_disk() {
+    let temp = DummyBook::new().build().unwrap();
+
+    let book_toml = r#"
+[book]
+title = "book"
+    "#;
+
+    write_file(&temp.path(), "book.toml", book_toml.as_bytes()).unwrap();
+
+    let cfg = Config::from_disk(&temp.path().join("book.toml")).unwrap();
+
+    let md = MDBook::load_with_config(temp.path(), cfg).unwrap();
+    md.build().unwrap();
+
+    let index_html = temp.path().join("book").join("index.html");
+    assert_contains_strings(index_html, &vec![r#"<title>Dummy Book - book</title>"#]);
+}
+
+#[test]
+fn load_with_config_and_summary() {
+    let temp = DummyBook::new().build().unwrap();
+
+    let cfg = Config::default();
+    let summary = fs::read_to_string(temp.path().join("src").join("SUMMARY.md")).unwrap();
+    let summary = parse_summary(&summary).unwrap();
+
+    let md = MDBook::load_with_config_and_summary(temp.path(), cfg, summary).unwrap();
+    md.build().unwrap();
+
+    let index_html = temp.path().join("book").join("index.html");
+    assert_contains_strings(index_html, &vec![r#"<title>Dummy Book</title>"#]);
+}
+
+#[test]
+#[should_panic]
+fn try_load_with_missing_file() {
+    let temp = DummyBook::new().build().unwrap();
+    MDBook::load_with_config_file(temp.path(), &temp.path().join("not-there.toml")).unwrap();
+}