feat: create tuono_internal crate (#395)

crates/tuono_internal/tests/config.rs

@@ -0,0 +1,50 @@
+mod utils;
+use serial_test::serial;
+use std::io::ErrorKind;
+use tuono_internal::config::Config;
+use utils::TempTuonoProject;
+
+#[test]
+#[serial]
+fn should_correctly_read_the_config_file() {
+    let folder = TempTuonoProject::new();
+
+    folder.add_file_with_content(
+        "./.tuono/config/config.json",
+        r#"{ "server": {"host": "localhost", "port": 3000}}"#,
+    );
+
+    let config = Config::get();
+
+    assert!(config.is_ok());
+
+    let config = config.unwrap();
+    assert_eq!(config.server.host, "localhost");
+    assert_eq!(config.server.port, 3000);
+}
+
+#[test]
+#[serial]
+fn should_fail_if_the_file_does_not_exist() {
+    TempTuonoProject::new();
+
+    let config = Config::get();
+
+    assert!(config.is_err());
+
+    assert_eq!(config.err().unwrap().kind(), ErrorKind::NotFound);
+}
+
+#[test]
+#[serial]
+fn should_fail_if_the_file_is_not_json() {
+    let folder = TempTuonoProject::new();
+
+    folder.add_file_with_content("./.tuono/config/config.json", "INVALID JSON");
+
+    let config = Config::get();
+
+    assert!(config.is_err());
+
+    assert_eq!(config.err().unwrap().kind(), ErrorKind::InvalidData);
+}