Bug 1353429: Test Principal URI escaping.r=valentin

Differential Revision: https://phabricator.services.mozilla.com/D66997

--HG--
extra : moz-landing-system : lando

caps/tests/unit/test_uri_escaping.js

@@ -0,0 +1,29 @@
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+var ssm = Services.scriptSecurityManager;
+
+function makeURI(uri) {
+  return Services.io.newURI(uri);
+}
+
+function createPrincipal(aURI) {
+  try {
+    var uri = makeURI(aURI);
+    var principal = ssm.createContentPrincipal(uri, {});
+    return principal;
+  } catch (e) {
+    return null;
+  }
+}
+
+function run_test() {
+  Assert.equal(createPrincipal("http://test^test/foo^bar#x^y"), null);
+
+  Assert.equal(createPrincipal("http://test^test/foo\\bar"), null);
+
+  Assert.equal(createPrincipal("http://test:2^3/foo\\bar"), null);
+
+  Assert.equal(
+    createPrincipal("http://test/foo^bar").exposableSpec,
+    "http://test/foo%5Ebar"
+  );
+}

caps/tests/unit/xpcshell.ini

@@ -2,4 +2,5 @@
 head =
 
 [test_origin.js]
+[test_uri_escaping.js]
 [test_ipv6_host_literal.js]