1 files changed, 90 insertions, 0 deletions
diff --git a/browser/modules/test/unit/test_E10SUtils_nested_URIs.js b/browser/modules/test/unit/test_E10SUtils_nested_URIs.js
new file mode 100644
index 0000000000..5ebcac114f
--- /dev/null
+++ b/browser/modules/test/unit/test_E10SUtils_nested_URIs.js
@@ -0,0 +1,90 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+
+const { E10SUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/E10SUtils.sys.mjs"
+);
+
+var TEST_PREFERRED_REMOTE_TYPES = [
+  E10SUtils.WEB_REMOTE_TYPE,
+  E10SUtils.NOT_REMOTE,
+  "fakeRemoteType",
+];
+
+// These test cases give a nestedURL and a plainURL that should always load in
+// the same remote type. By making these tests comparisons, they should work
+// with any pref combination.
+var TEST_CASES = [
+  {
+    nestedURL: "jar:file:///some.file!/",
+    plainURL: "file:///some.file",
+  },
+  {
+    nestedURL: "jar:jar:file:///some.file!/!/",
+    plainURL: "file:///some.file",
+  },
+  {
+    nestedURL: "jar:http://some.site/file!/",
+    plainURL: "http://some.site/file",
+  },
+  {
+    nestedURL: "view-source:http://some.site",
+    plainURL: "http://some.site",
+  },
+  {
+    nestedURL: "view-source:file:///some.file",
+    plainURL: "file:///some.file",
+  },
+  {
+    nestedURL: "view-source:about:home",
+    plainURL: "about:home",
+  },
+  {
+    nestedURL: "view-source:about:robots",
+    plainURL: "about:robots",
+  },
+  {
+    nestedURL: "view-source:pcast:http://some.site",
+    plainURL: "http://some.site",
+  },
+];
+
+function run_test() {
+  for (let testCase of TEST_CASES) {
+    for (let preferredRemoteType of TEST_PREFERRED_REMOTE_TYPES) {
+      let plainUri = Services.io.newURI(testCase.plainURL);
+      let plainRemoteType = E10SUtils.getRemoteTypeForURIObject(plainUri, {
+        multiProcess: true,
+        remoteSubFrames: false,
+        preferredRemoteType,
+      });
+
+      let nestedUri = Services.io.newURI(testCase.nestedURL);
+      let nestedRemoteType = E10SUtils.getRemoteTypeForURIObject(nestedUri, {
+        multiProcess: true,
+        remoteSubFrames: false,
+        preferredRemoteType,
+      });
+
+      let nestedStr = nestedUri.scheme + ":";
+      do {
+        nestedUri = nestedUri.QueryInterface(Ci.nsINestedURI).innerURI;
+        if (nestedUri.scheme == "about") {
+          nestedStr += nestedUri.spec;
+          break;
+        }
+
+        nestedStr += nestedUri.scheme + ":";
+      } while (nestedUri instanceof Ci.nsINestedURI);
+
+      let plainStr =
+        plainUri.scheme == "about" ? plainUri.spec : plainUri.scheme + ":";
+      equal(
+        nestedRemoteType,
+        plainRemoteType,
+        `Check that ${nestedStr} loads in same remote type as ${plainStr}` +
+          ` with preferred remote type: ${preferredRemoteType}`
+      );
+    }
+  }
+}