fix(op_crates/web): Use "deno:" URLs for internal script specifiers (#7383)

op_crates/web/Cargo.toml

@@ -2,7 +2,7 @@
 
 [package]
 name = "deno_web"
-version = "0.7.0"
+version = "0.7.1"
 edition = "2018"
 description = "Collection of Web APIs"
 authors = ["the Deno authors"]

op_crates/web/lib.rs

@@ -2,30 +2,32 @@
 
 use deno_core::js_check;
 use deno_core::JsRuntime;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 
 pub fn init(isolate: &mut JsRuntime) {
+  let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
   let files = vec![
-    get_path("00_dom_exception.js"),
-    get_path("01_event.js"),
-    get_path("02_abort_signal.js"),
-    get_path("08_text_encoding.js"),
+    manifest_dir.join("00_dom_exception.js"),
+    manifest_dir.join("01_event.js"),
+    manifest_dir.join("02_abort_signal.js"),
+    manifest_dir.join("08_text_encoding.js"),
   ];
+  // TODO(nayeemrmn): https://github.com/rust-lang/cargo/issues/3946 to get the
+  // workspace root.
+  let display_root = manifest_dir.parent().unwrap().parent().unwrap();
   for file in files {
     println!("cargo:rerun-if-changed={}", file.display());
+    let display_path = file.strip_prefix(display_root).unwrap();
+    let display_path_str = display_path.display().to_string();
     js_check(isolate.execute(
-      &file.to_string_lossy(),
+      &("deno:".to_string() + &display_path_str.replace('\\', "/")),
       &std::fs::read_to_string(&file).unwrap(),
     ));
   }
 }
 
 pub fn get_declaration() -> PathBuf {
-  get_path("lib.deno_web.d.ts")
-}
-
-fn get_path(file_name: &str) -> PathBuf {
-  PathBuf::from(env!("CARGO_MANIFEST_DIR")).join(file_name)
+  PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("lib.deno_web.d.ts")
 }
 
 #[cfg(test)]
@@ -78,6 +80,25 @@ mod tests {
     });
   }
 
+  #[test]
+  fn test_event_error() {
+    run_in_task(|mut cx| {
+      let mut isolate = setup();
+      let result = isolate.execute("foo.js", "new Event()");
+      if let Err(error) = result {
+        let error_string = error.to_string();
+        // Test that the script specifier is a URL: `deno:<repo-relative path>`.
+        assert!(error_string.starts_with("deno:op_crates/web/01_event.js"));
+        assert!(error_string.contains("Uncaught TypeError"));
+      } else {
+        unreachable!();
+      }
+      if let Poll::Ready(Err(_)) = isolate.poll_unpin(&mut cx) {
+        unreachable!();
+      }
+    });
+  }
+
   #[test]
   fn test_event_target() {
     run_in_task(|mut cx| {