zulip/web/tests/lib/zblueslip.js

128 lines
3.9 KiB
JavaScript

"use strict";
const {strict: assert} = require("assert");
function make_zblueslip() {
const lib = {};
const opts = {
// Silently swallow all debug, log and info calls.
debug: false,
log: false,
info: false,
// Check against expected error values for the following.
warn: true,
error: true,
};
const names = Object.keys(opts);
// For fatal messages, we should use assert.throws
/* istanbul ignore next */
lib.fatal = (msg) => {
throw new Error(msg);
};
// Store valid test data for options.
lib.test_data = {};
lib.test_logs = {};
for (const name of names) {
lib.test_data[name] = [];
lib.test_logs[name] = [];
}
lib.expect = (name, message, expected_count = 1) => {
assert.notEqual(opts[name], undefined, `unexpected arg for expect: ${name}`);
assert.ok(
expected_count > 0 && Number.isInteger(expected_count),
"expected count should be a positive integer",
);
const obj = {message, count: 0, expected_count};
lib.test_data[name].push(obj);
};
const check_seen_messages = () => {
for (const name of names) {
for (const obj of lib.test_logs[name]) {
const message = obj.message;
const i = lib.test_data[name].findIndex((x) => x.message === message);
if (i === -1) {
// Only throw this for message types we want to explicitly track.
// For example, we do not want to throw here for debug messages.
if (opts[name]) {
throw new Error(`Unexpected '${name}' message: ${message}`);
}
continue;
}
lib.test_data[name][i].count += 1;
}
for (const obj of lib.test_data[name]) {
const message = obj.message;
assert.equal(
obj.count,
obj.expected_count,
`Expected ${obj.expected_count} of '${name}': ${message}`,
);
}
}
};
lib.reset = (skip_checks = false) => {
if (!skip_checks) {
check_seen_messages();
}
for (const name of names) {
lib.test_data[name] = [];
lib.test_logs[name] = [];
}
};
lib.get_test_logs = (name) => lib.test_logs[name];
// Create logging functions
for (const name of names) {
if (!opts[name]) {
// should just log the message.
lib[name] = function (message, more_info, stack) {
lib.test_logs[name].push({message, more_info, stack});
};
continue;
}
lib[name] = function (message, more_info, stack) {
/* istanbul ignore if */
if (typeof message !== "string") {
// We may catch exceptions in blueslip, and if
// so our stub should include that.
if (message.toString().includes("exception")) {
message = message.toString();
} else {
throw new Error("message should be string: " + message);
}
}
lib.test_logs[name].push({message, more_info, stack});
const matched_error_message = lib.test_data[name].find((x) => x.message === message);
const exact_match_fail = !matched_error_message;
if (exact_match_fail) {
const error = new Error(`Invalid ${name} message: "${message}".`);
error.blueslip = true;
throw error;
}
};
}
lib.exception_msg = function (ex) {
return ex.message;
};
lib.measure_time = (label, f) => f();
/* istanbul ignore next */
lib.preview_node = (node) => "node:" + node;
return lib;
}
module.exports = make_zblueslip();