test(lettre_email): Replace skeptic by some custom rustdoc invocations

lettre_email/Cargo.toml

@@ -10,17 +10,13 @@ license = "MIT"
 authors = ["Alexis Mousset <contact@amousset.me>"]
 categories = ["email"]
 keywords = ["email", "mailer"]
-build = "build.rs"
 
 [badges]
 travis-ci = { repository = "lettre/lettre_email" }
 
 [dev-dependencies]
 lettre = { version = "^0.8", path = "../lettre", features = ["smtp-transport"] }
-skeptic = "^0.13"
-
-[build-dependencies]
-skeptic = "^0.13"
+glob = "0.2"
 
 [dependencies]
 email = "^0.0"

lettre_email/build.rs

@@ -1,11 +0,0 @@
-extern crate skeptic;
-
-use skeptic::*;
-
-fn main() {
-    let mut mdbook_files = markdown_files_of_directory("../website/content/creating-messages/");
-    // Also add "README.md" to the list of files.
-    mdbook_files.push("README.md".into());
-
-    generate_doc_tests(&mdbook_files);
-}

lettre_email/tests/skeptic.rs

@@ -1 +1,48 @@
-include!(concat!(env!("OUT_DIR"), "/skeptic-tests.rs"));
+extern crate glob;
+
+use self::glob::glob;
+use std::env::consts::EXE_EXTENSION;
+use std::env;
+use std::path::Path;
+use std::process::Command;
+
+#[test]
+fn book_test() {
+    let mut book_path = env::current_dir().unwrap();
+    book_path.push(
+        Path::new(file!())
+            .parent()
+            .unwrap()
+            .parent()
+            .unwrap()
+            .parent()
+            .unwrap()
+            .join("../website/content/creating-messages"),
+    ); // For some reasons, calling .parent() once more gives us None...
+
+    for md in glob(&format!("{}/*.md", book_path.to_str().unwrap())).unwrap() {
+        skeptic_test(&md.unwrap());
+    }
+}
+
+fn skeptic_test(path: &Path) {
+    let rustdoc = Path::new("rustdoc").with_extension(EXE_EXTENSION);
+    let exe = env::current_exe().unwrap();
+    let depdir = exe.parent().unwrap();
+
+    let mut cmd = Command::new(rustdoc);
+    cmd.args(&["--verbose", "--test"])
+        .arg("-L")
+        .arg(&depdir)
+        .arg(path);
+
+    let result = cmd.spawn()
+        .expect("Failed to spawn process")
+        .wait()
+        .expect("Failed to run process");
+
+    assert!(
+        result.success(),
+        format!("Failed to run rustdoc tests on {:?}!", path)
+    );
+}