mdBook/tests/config.rs

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Rust
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extern crate mdbook;
extern crate tempdir;
use std::fs::File;
use std::io::Write;
use mdbook::MDBook;
use tempdir::TempDir;
// Tests that config values unspecified in the configuration file do not overwrite
// values specified earlier.
#[test]
fn do_not_overwrite_unspecified_config_values() {
let dir = TempDir::new("mdbook").expect("Could not create a temp dir");
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let book = MDBook::new(dir.path())
.with_source("bar")
.with_destination("baz")
.with_mathjax_support(true);
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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"));
// Test when trying to read a config file that does not exist
let book = book.read_config().expect("Error reading the config file");
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);
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// Try with a partial config file
let file_path = dir.path().join("book.toml");
let mut f = File::create(file_path).expect("Could not create config file");
f.write_all(br#"source = "barbaz""#).expect("Could not write to config file");
f.sync_all().expect("Could not sync the file");
let book = book.read_config().expect("Error reading the config file");
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);
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}