relative redirect server & fetch test

cli/tests/unit/fetch_test.ts

@@ -335,6 +335,27 @@ unitTest(
   }
 );
 
+unitTest(
+  {
+    perms: { net: true },
+  },
+  async function fetchWithRelativeRedirectionUrl(): Promise<void> {
+    const cases = [
+      ["end", "http://localhost:4551/a/b/end"],
+      ["/end", "http://localhost:4551/end"],
+    ];
+    for (const [loc, redUrl] of cases) {
+      const response = await fetch("http://localhost:4551/a/b/c", {
+        headers: new Headers([["x-location", loc]]),
+      });
+      assertEquals(response.url, redUrl);
+      assertEquals(response.redirected, true);
+      assertEquals(response.ok, true);
+      assertEquals(await response.text(), "Hello, World!");
+    }
+  }
+);
+
 unitTest(
   {
     perms: { net: true },

test_util/src/lib.rs

@@ -35,6 +35,7 @@ const ANOTHER_REDIRECT_PORT: u16 = 4547;
 const DOUBLE_REDIRECTS_PORT: u16 = 4548;
 const INF_REDIRECTS_PORT: u16 = 4549;
 const REDIRECT_ABSOLUTE_PORT: u16 = 4550;
+const REDIRECT_RELATIVE_PORT: u16 = 4551;
 const HTTPS_PORT: u16 = 5545;
 
 pub const PERMISSION_VARIANTS: [&str; 5] =
@@ -155,6 +156,22 @@ pub async fn run_all_servers() {
   let absolute_redirect_server_fut =
     warp::serve(routes).bind(([127, 0, 0, 1], REDIRECT_ABSOLUTE_PORT));
 
+  let routes = warp::path!("a" / "b" / "c")
+    .and(warp::header::<String>("x-location"))
+    .map(|token: String| {
+      let uri: Uri = token.parse().unwrap();
+      warp::redirect(uri)
+    })
+    .or(
+      warp::any()
+      .map(|| {
+        "Hello, World!"
+      })
+    );
+
+  let relative_redirect_server_fut =
+    warp::serve(routes).bind(([127, 0, 0, 1], REDIRECT_RELATIVE_PORT));
+
   let echo_server = warp::path("echo_server")
     .and(warp::post())
     .and(warp::body::bytes())
@@ -343,6 +360,7 @@ pub async fn run_all_servers() {
       inf_redirect_server_fut,
       double_redirect_server_fut,
       absolute_redirect_server_fut,
+      relative_redirect_server_fut
     )
   }
   .boxed();