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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
/* eslint-env node */
async function get_command_function(cmd, commands) {
/*
Converts a string such as `measure.start` into the actual
function that is found in the `commands` module.
XXX: Find a way to share this function between
perftest_record.js and browsertime_interactive.js
*/
if (cmd == "") {
throw new Error("A blank command was given.");
} else if (cmd.endsWith(".")) {
throw new Error(
"An extra `.` was found at the end of this command: " + cmd
);
}
// `func` will hold the actual method that needs to be called,
// and the `parent_mod` is the context required to run the `func`
// method. Without that context, `this` becomes undefined in the browsertime
// classes.
let func = null;
let parent_mod = null;
for (let func_part of cmd.split(".")) {
if (func_part == "") {
throw new Error(
"An empty function part was found in the command: " + cmd
);
}
if (func === null) {
parent_mod = commands;
func = commands[func_part];
} else if (func !== undefined) {
parent_mod = func;
func = func[func_part];
} else {
break;
}
}
if (func == undefined) {
throw new Error(
"The given command could not be found as a function: " + cmd
);
}
return [func, parent_mod];
}
module.exports = async function (context, commands) {
context.log.info("Starting an interactive browsertime test");
let page_cycles = context.options.browsertime.page_cycles;
let post_startup_delay = context.options.browsertime.post_startup_delay;
let input_cmds = context.options.browsertime.commands;
context.log.info(
"Waiting for %d ms (post_startup_delay)",
post_startup_delay
);
await commands.wait.byTime(post_startup_delay);
// unpack commands from python
let cmds = input_cmds.split(";;;");
for (let count = 0; count < page_cycles; count++) {
context.log.info("Navigating to about:blank w/nav, count: " + count);
await commands.navigate("about:blank");
let pages_visited = [];
for (let cmdstr of cmds) {
let [cmd, ...args] = cmdstr.split(":::");
if (cmd == "measure.start") {
if (args[0] != "") {
pages_visited.push(args[0]);
}
}
let [func, parent_mod] = await get_command_function(cmd, commands);
try {
await func.call(parent_mod, ...args);
} catch (e) {
context.log.info(
`Exception found while running \`commands.${cmd}(${args})\`: `
);
context.log.info(e.stack);
}
}
// Log the number of pages visited for results parsing
context.log.info("[] metrics: pages_visited: " + pages_visited);
}
context.log.info("Browsertime pageload ended.");
return true;
};