fix(coverage): ignore files from npm registry (#18457)

Fixes https://github.com/denoland/deno/issues/17664 and part of
https://github.com/denoland/deno/issues/18454 by excluding files
belonging to npm modules by default in the coverage output.

cli/npm/resolvers/mod.rs

@@ -74,6 +74,10 @@ impl NpmPackageResolver {
     }
   }
 
+  pub fn root_dir_url(&self) -> &Url {
+    self.fs_resolver.root_dir_url()
+  }
+
   pub fn resolve_pkg_id_from_pkg_req(
     &self,
     req: &NpmPackageReq,

cli/tests/integration/coverage_tests.rs

@@ -277,6 +277,54 @@ fn no_snaps_included(test_name: &str, extension: &str) {
   output.assert_exit_code(0);
 }
 
+#[test]
+fn no_npm_cache_coverage() {
+  let context = TestContext::default();
+  let tempdir = context.deno_dir();
+  let tempdir = tempdir.path().join("cov");
+
+  let output = context
+    .new_command()
+    .args_vec(vec![
+      "test".to_string(),
+      "--quiet".to_string(),
+      "--allow-read".to_string(),
+      format!("--coverage={}", tempdir.to_str().unwrap()),
+      format!("coverage/no_npm_coverage/no_npm_coverage_test.ts"),
+    ])
+    .run();
+
+  output.assert_exit_code(0);
+  output.skip_output_check();
+
+  let output = context
+    .new_command()
+    .args_vec(vec![
+      "coverage".to_string(),
+      format!("{}/", tempdir.to_str().unwrap()),
+    ])
+    .split_output()
+    .run();
+
+  // Verify there's no "Check" being printed
+  assert!(output.stderr().is_empty());
+
+  let actual = util::strip_ansi_codes(output.stdout()).to_string();
+
+  let expected = fs::read_to_string(
+    util::testdata_path().join("coverage/no_npm_coverage/expected.out"),
+  )
+  .unwrap();
+
+  if !util::wildcard_match(&expected, &actual) {
+    println!("OUTPUT\n{actual}\nOUTPUT");
+    println!("EXPECTED\n{expected}\nEXPECTED");
+    panic!("pattern match failed");
+  }
+
+  output.assert_exit_code(0);
+}
+
 #[test]
 fn no_transpiled_lines() {
   let context = TestContext::default();

cli/tests/testdata/coverage/no_npm_coverage/expected.out

@@ -0,0 +1 @@
+cover [WILDCARD]/no_npm_coverage/no_npm_coverage.ts ... 100.000% (4/4)

cli/tests/testdata/coverage/no_npm_coverage/no_npm_coverage.ts

@@ -0,0 +1,4 @@
+import chalk from "npm:chalk";
+export function main() {
+  console.log(chalk.red("RED"));
+}

cli/tests/testdata/coverage/no_npm_coverage/no_npm_coverage_test.ts

@@ -0,0 +1,4 @@
+import { main } from "./no_npm_coverage.ts";
+Deno.test("main", () => {
+  main();
+});

cli/tools/coverage/mod.rs

@@ -588,6 +588,7 @@ fn filter_coverages(
   coverages: Vec<ScriptCoverage>,
   include: Vec<String>,
   exclude: Vec<String>,
+  npm_root_dir: &str,
 ) -> Vec<ScriptCoverage> {
   let include: Vec<Regex> =
     include.iter().map(|e| Regex::new(e).unwrap()).collect();
@@ -599,6 +600,7 @@ fn filter_coverages(
     .into_iter()
     .filter(|e| {
       let is_internal = e.url.starts_with("ext:")
+        || e.url.starts_with(npm_root_dir)
         || e.url.ends_with("__anonymous__")
         || e.url.ends_with("$deno$test.js")
         || e.url.ends_with(".snap");
@@ -620,12 +622,14 @@ pub async fn cover_files(
   }
 
   let ps = ProcState::build(flags).await?;
+  let root_dir_url = ps.npm_resolver.root_dir_url();
 
   let script_coverages = collect_coverages(coverage_flags.files)?;
   let script_coverages = filter_coverages(
     script_coverages,
     coverage_flags.include,
     coverage_flags.exclude,
+    root_dir_url.as_str(),
   );
 
   let proc_coverages: Vec<_> = script_coverages