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+/**
+ * @fileoverview Test case for mixed-content in web-platform-tests.
+ * @author burnik@google.com (Kristijan Burnik)
+ */
+
+/**
+ * MixedContentTestCase exercises all the tests for checking browser behavior
+ * when resources regarded as mixed-content are requested. A single run covers
+ * only a single scenario.
+ * @param {object} scenario A JSON describing the test arrangement and
+ *     expectation(s). Refer to /mixed-content/spec.src.json for details.
+ * @param {string} description The test scenario verbose description.
+ * @param {SanityChecker} sanityChecker Instance of an object used to check the
+ *     running scenario. Useful in debug mode. See ./sanity-checker.js.
+ *     Run {@code ./tools/generate.py -h} for info on test generating modes.
+ * @return {object} Object wrapping the start method used to run the test.
+ */
+function TestCase(scenarios, sanityChecker) {
+  function runTest(scenario) {
+    sanityChecker.checkScenario(scenario, subresourceMap);
+
+    const urls = getRequestURLs(scenario.subresource,
+                                scenario.origin,
+                                scenario.redirection);
+    const checkResult = _ => {
+      // Send request to check if the key has been torn down.
+      return xhrRequest(urls.assertUrl)
+        .then(assertResult => {
+            // Now check if the value has been torn down. If it's still there,
+            // we have blocked the request to mixed-content.
+            assert_equals(assertResult.status, scenario.expectation,
+              "The resource request should be '" + scenario.expectation + "'.");
+          });
+    };
+
+    /** @type {Subresource} */
+    const subresource = {
+      subresourceType: scenario.subresource,
+      url: urls.testUrl,
+      policyDeliveries: scenario.subresource_policy_deliveries,
+    };
+
+    promise_test(() => {
+      return xhrRequest(urls.announceUrl)
+        // Send out the real resource request.
+        // This should tear down the key if it's not blocked.
+        .then(_ => invokeRequest(subresource, scenario.source_context_list))
+        // We check the key state, regardless of whether the main request
+        // succeeded or failed.
+        .then(checkResult, checkResult);
+      }, scenario.test_description);
+  }  // runTest
+
+  function runTests() {
+    for (const scenario of scenarios) {
+      runTest(scenario);
+    }
+  }
+
+  return {start: runTests};
+}