mirror of
https://github.com/servo/servo.git
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223 lines
8.6 KiB
JavaScript
223 lines
8.6 KiB
JavaScript
/**
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* Each test is run twice: once using etag/If-None-Match and once with
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* date/If-Modified-Since. Each test run gets its own URL and randomized
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* content and operates independently.
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*
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* The test steps are run with request_cache.length fetch requests issued
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* and their immediate results sanity-checked. The cache.py server script
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* stashes an entry containing any If-None-Match, If-Modified-Since, Pragma,
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* and Cache-Control observed headers for each request it receives. When
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* the test fetches have run, this state is retrieved from cache.py and the
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* expected_* lists are checked, including their length.
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*
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* This means that if a request_* fetch is expected to hit the cache and not
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* touch the network, then there will be no entry for it in the expect_*
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* lists. AKA (request_cache.length - expected_validation_headers.length)
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* should equal the number of cache hits that didn't touch the network.
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*
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* Test dictionary keys:
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* - state: required string that determines whether the Expires response for
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* the fetched document should be set in the future ("fresh") or past
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* ("stale").
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* - vary: optional string to be passed to the server for it to quote back
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* in a Vary header on the response to us.
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* - cache_control: optional string to be passed to the server for it to
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* quote back in a Cache-Control header on the response to us.
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* - redirect: optional string "same-origin" or "cross-origin". If
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* provided, the server will issue an absolute redirect to the script on
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* the same or a different origin, as appropriate. The redirected
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* location is the script with the redirect parameter removed, so the
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* content/state/etc. will be as if you hadn't specified a redirect.
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* - request_cache: required array of cache modes to use (via `cache`).
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* - request_headers: optional array of explicit fetch `headers` arguments.
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* If provided, the server will log an empty dictionary for each request
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* instead of the request headers it would normally log.
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* - response: optional array of specialized response handling. Right now,
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* "error" array entries indicate a network error response is expected
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* which will reject with a TypeError.
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* - expected_validation_headers: required boolean array indicating whether
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* the server should have seen an If-None-Match/If-Modified-Since header
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* in the request.
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* - expected_no_cache_headers: required boolean array indicating whether
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* the server should have seen Pragma/Cache-control:no-cache headers in
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* the request.
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* - expected_max_age_headers: optional boolean array indicating whether
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* the server should have seen a Cache-Control:max-age=0 header in the
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* request.
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*/
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var now = new Date();
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function base_path() {
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return location.pathname.replace(/\/[^\/]*$/, '/');
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}
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function make_url(uuid, id, value, content, info) {
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var dates = {
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fresh: new Date(now.getFullYear() + 1, now.getMonth(), now.getDay()).toGMTString(),
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stale: new Date(now.getFullYear() - 1, now.getMonth(), now.getDay()).toGMTString(),
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};
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var vary = "";
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if ("vary" in info) {
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vary = "&vary=" + info.vary;
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}
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var cache_control = "";
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if ("cache_control" in info) {
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cache_control = "&cache_control=" + info.cache_control;
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}
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var redirect = "";
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var ignore_request_headers = "";
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if ("request_headers" in info) {
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// Ignore the request headers that we send since they may be synthesized by the test.
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ignore_request_headers = "&ignore";
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}
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var url_sans_redirect = "resources/cache.py?token=" + uuid +
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"&content=" + content +
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"&" + id + "=" + value +
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"&expires=" + dates[info.state] +
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vary + cache_control + ignore_request_headers;
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// If there's a redirect, the target is the script without any redirect at
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// either the same domain or a different domain.
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if ("redirect" in info) {
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var host_info = get_host_info();
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var origin;
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switch (info.redirect) {
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case "same-origin":
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origin = host_info['HTTP_ORIGIN'];
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break;
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case "cross-origin":
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origin = host_info['HTTP_REMOTE_ORIGIN'];
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break;
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}
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var redirected_url = origin + base_path() + url_sans_redirect;
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return url_sans_redirect + "&redirect=" + encodeURIComponent(redirected_url);
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} else {
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return url_sans_redirect;
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}
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}
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function expected_status(type, identifier, init) {
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if (type == "date" &&
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init.headers &&
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init.headers["If-Modified-Since"] == identifier) {
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// The server will respond with a 304 in this case.
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return [304, "Not Modified"];
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}
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return [200, "OK"];
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}
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function expected_response_text(type, identifier, init, content) {
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if (type == "date" &&
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init.headers &&
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init.headers["If-Modified-Since"] == identifier) {
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// The server will respond with a 304 in this case.
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return "";
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}
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return content;
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}
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function server_state(uuid) {
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return fetch("resources/cache.py?querystate&token=" + uuid)
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.then(function(response) {
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return response.text();
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}).then(function(text) {
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// null will be returned if the server never received any requests
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// for the given uuid. Normalize that to an empty list consistent
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// with our representation.
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return JSON.parse(text) || [];
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});
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}
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function make_test(type, info) {
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return function(test) {
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var uuid = token();
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var identifier = (type == "tag" ? Math.random() : now.toGMTString());
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var content = Math.random().toString();
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var url = make_url(uuid, type, identifier, content, info);
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var fetch_functions = [];
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for (var i = 0; i < info.request_cache.length; ++i) {
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fetch_functions.push(function(idx) {
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var init = {cache: info.request_cache[idx]};
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if ("request_headers" in info) {
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init.headers = info.request_headers[idx];
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}
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if (init.cache === "only-if-cached") {
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// only-if-cached requires we use same-origin mode.
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init.mode = "same-origin";
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}
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return fetch(url, init)
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.then(function(response) {
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if ("response" in info && info.response[idx] === "error") {
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assert_true(false, "fetch should have been an error");
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return;
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}
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assert_array_equals([response.status, response.statusText],
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expected_status(type, identifier, init));
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return response.text();
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}).then(function(text) {
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assert_equals(text, expected_response_text(type, identifier, init, content));
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}, function(reason) {
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if ("response" in info && info.response[idx] === "error") {
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assert_throws(new TypeError(), function() { throw reason; });
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} else {
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throw reason;
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}
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});
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});
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}
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var i = 0;
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function run_next_step() {
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if (fetch_functions.length) {
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return fetch_functions.shift()(i++)
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.then(run_next_step);
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} else {
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return Promise.resolve();
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}
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}
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return run_next_step()
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.then(function() {
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// Now, query the server state
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return server_state(uuid);
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}).then(function(state) {
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var expectedState = [];
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info.expected_validation_headers.forEach(function (validate) {
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if (validate) {
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if (type == "tag") {
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expectedState.push({"If-None-Match": '"' + identifier + '"'});
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} else {
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expectedState.push({"If-Modified-Since": identifier});
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}
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} else {
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expectedState.push({});
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}
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});
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for (var i = 0; i < info.expected_no_cache_headers.length; ++i) {
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if (info.expected_no_cache_headers[i]) {
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expectedState[i]["Pragma"] = "no-cache";
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expectedState[i]["Cache-Control"] = "no-cache";
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}
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}
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if ("expected_max_age_headers" in info) {
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for (var i = 0; i < info.expected_max_age_headers.length; ++i) {
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if (info.expected_max_age_headers[i]) {
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expectedState[i]["Cache-Control"] = "max-age=0";
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}
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}
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}
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assert_equals(state.length, expectedState.length);
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for (var i = 0; i < state.length; ++i) {
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for (var header in state[i]) {
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assert_equals(state[i][header], expectedState[i][header]);
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delete expectedState[i][header];
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}
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for (var header in expectedState[i]) {
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assert_false(header in state[i]);
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}
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}
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});
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};
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}
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function run_tests(tests)
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{
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tests.forEach(function(info) {
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promise_test(make_test("tag", info), info.name + " with Etag and " + info.state + " response");
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promise_test(make_test("date", info), info.name + " with Last-Modified and " + info.state + " response");
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});
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}
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