Add minimal testing for the optional MathJax support

tests/config.rs

@@ -15,7 +15,8 @@ fn do_not_overwrite_unspecified_config_values() {
 
     let book = MDBook::new(dir.path())
         .with_source("bar")
-        .with_destination("baz");
+        .with_destination("baz")
+        .with_mathjax_support(true);
 
     assert_eq!(book.get_root(), dir.path());
     assert_eq!(book.get_source(), dir.path().join("bar"));
@@ -27,6 +28,7 @@ fn do_not_overwrite_unspecified_config_values() {
     assert_eq!(book.get_root(), dir.path());
     assert_eq!(book.get_source(), dir.path().join("bar"));
     assert_eq!(book.get_destination().unwrap(), dir.path().join("baz"));
+    assert_eq!(book.get_mathjax_support(), true);
 
     // Try with a partial config file
     let file_path = dir.path().join("book.toml");
@@ -39,5 +41,6 @@ fn do_not_overwrite_unspecified_config_values() {
     assert_eq!(book.get_root(), dir.path());
     assert_eq!(book.get_source(), dir.path().join("barbaz"));
     assert_eq!(book.get_destination().unwrap(), dir.path().join("baz"));
+    assert_eq!(book.get_mathjax_support(), true);
 }
 

tests/tomlconfig.rs

@@ -101,6 +101,20 @@ fn from_toml_output_html_curly_quotes() {
     assert_eq!(htmlconfig.get_curly_quotes(), true);
 }
 
+// Tests that the `output.html.mathjax-support` key is correctly parsed in the TOML config
+#[test]
+fn from_toml_output_html_mathjax_support() {
+    let toml = r#"[output.html]
+    mathjax-support = true"#;
+
+    let parsed = TomlConfig::from_toml(&toml).expect("This should parse");
+    let config = BookConfig::from_tomlconfig("root", parsed);
+
+    let htmlconfig = config.get_html_config().expect("There should be an HtmlConfig");
+
+    assert_eq!(htmlconfig.get_mathjax_support(), true);
+}
+
 // Tests that the `output.html.google-analytics` key is correctly parsed in the TOML config
 #[test]
 fn from_toml_output_html_google_analytics() {