Vendor dependencies

Let's see how I like this workflow.

vendor/js-sys/tests/wasm/EvalError.rs

@@ -0,0 +1,62 @@
+use js_sys::*;
+use wasm_bindgen::JsCast;
+use wasm_bindgen::JsValue;
+use wasm_bindgen_test::*;
+
+// Note: This error is not thrown any more, so there are no tests that will generate this error.
+// Instead we just have to manually construct it
+
+#[wasm_bindgen_test]
+fn new() {
+    let error = EvalError::new("some message");
+    let base_error: &Error = error.dyn_ref().unwrap();
+    assert_eq!(JsValue::from(base_error.message()), "some message");
+}
+
+#[wasm_bindgen_test]
+fn set_message() {
+    let error = EvalError::new("test");
+    let base_error: &Error = error.dyn_ref().unwrap();
+    base_error.set_message("another");
+    assert_eq!(JsValue::from(base_error.message()), "another");
+}
+
+#[wasm_bindgen_test]
+fn name() {
+    let error = EvalError::new("test");
+    let base_error: &Error = error.dyn_ref().unwrap();
+    assert_eq!(JsValue::from(base_error.name()), "EvalError");
+}
+
+#[wasm_bindgen_test]
+fn set_name() {
+    let error = EvalError::new("test");
+    let base_error: &Error = error.dyn_ref().unwrap();
+    base_error.set_name("different");
+    assert_eq!(JsValue::from(base_error.name()), "different");
+}
+
+#[wasm_bindgen_test]
+fn to_string() {
+    let error = EvalError::new("error message 1");
+    let base_error: &Error = error.dyn_ref().unwrap();
+    assert_eq!(
+        JsValue::from(base_error.to_string()),
+        "EvalError: error message 1"
+    );
+    base_error.set_name("error_name_1");
+    assert_eq!(
+        JsValue::from(base_error.to_string()),
+        "error_name_1: error message 1"
+    );
+}
+
+#[wasm_bindgen_test]
+fn evalerror_inheritance() {
+    let error = EvalError::new("some message");
+    assert!(error.is_instance_of::<EvalError>());
+    assert!(error.is_instance_of::<Error>());
+    assert!(error.is_instance_of::<Object>());
+    let _: &Error = error.as_ref();
+    let _: &Object = error.as_ref();
+}