feat: add workspace skeleton and server configuration validation

bin/tests/check.rs

@@ -0,0 +1,64 @@
+//! `--check` end to end: a configuration on disk through to the resolved
+//! routing, without a renderer registry or a socket.
+
+use std::fs;
+
+const FORMATS: &[&str] = &["gemtext", "html"];
+
+/// Writes a two-site configuration beside a pair of content roots and returns
+/// the config path. The config deliberately sits outside both roots.
+fn fixture(dir: &std::path::Path) -> std::path::PathBuf {
+    let one = dir.join("one");
+    let two = dir.join("two");
+    fs::create_dir_all(&one).unwrap();
+    fs::create_dir_all(&two).unwrap();
+    let text = format!(
+        r#"
+version = 1
+
+[site.one]
+root = "{one}"
+hosts = ["one.test", "www.one.test"]
+
+[site.two]
+root = "{two}"
+hosts = ["two.test"]
+
+[listener.web]
+protocol = "http"
+bind = "0.0.0.0:8080"
+formats = ["html"]
+default_site = "one"
+
+[listener.feed]
+protocol = "nex"
+bind = "0.0.0.0:1900"
+formats = ["gemtext"]
+site = "two"
+"#,
+        one = one.to_str().unwrap(),
+        two = two.to_str().unwrap(),
+    );
+    let path = dir.join("itsybitsy.toml");
+    fs::write(&path, text).unwrap();
+    path
+}
+
+#[test]
+fn checks_a_two_site_configuration() {
+    let dir = tempfile::tempdir().unwrap();
+    let path = fixture(dir.path());
+    itsybitsy::check(&path, FORMATS).unwrap();
+}
+
+#[test]
+fn an_unprovided_format_names_itself_and_the_file() {
+    let dir = tempfile::tempdir().unwrap();
+    let path = fixture(dir.path());
+    // The registry is empty until a format crate lands, which is exactly the
+    // "feature switched off" case an operator hits.
+    let err = itsybitsy::check(&path, &[]).unwrap_err();
+    let rendered = format!("{err:#}");
+    assert!(rendered.contains("itsybitsy.toml"), "{rendered}");
+    assert!(rendered.contains("does not provide"), "{rendered}");
+}