refactor: port fetch test to rust (#3887)

cli/tests/integration_tests.rs

@@ -21,11 +21,36 @@ fn deno_dir_test() {
   drop(g);
 }
 
-// TODO(#2933): Rewrite this test in rust.
 #[test]
 fn fetch_test() {
+  pub use deno::test_util::*;
+  use std::process::Command;
+  use tempfile::TempDir;
+
   let g = util::http_server();
-  util::run_python_script("tools/fetch_test.py");
+
+  let deno_dir = TempDir::new().expect("tempdir fail");
+  let t = util::root_path().join("cli/tests/006_url_imports.ts");
+
+  let output = Command::new(deno_exe_path())
+    .env("DENO_DIR", deno_dir.path())
+    .current_dir(util::root_path())
+    .arg("fetch")
+    .arg(t)
+    .output()
+    .expect("Failed to spawn script");
+
+  let code = output.status.code();
+  let out = std::str::from_utf8(&output.stdout).unwrap();
+
+  assert_eq!(Some(0), code);
+  assert_eq!(out, "");
+
+  let expected_path = deno_dir
+    .path()
+    .join("deps/http/localhost_PORT4545/cli/tests/subdir/mod2.ts");
+  assert_eq!(expected_path.exists(), true);
+
   drop(g);
 }