zulip/frontend_tests/zjsunit/zblueslip.js

120 lines
3.9 KiB
JavaScript

exports.make_zblueslip = function () {
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 = Array.from(Object.keys(opts));
// For fatal messages, we should use assert.throws
lib.fatal = (msg) => {
throw 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, count = 1) => {
if (opts[name] === undefined) {
throw Error('unexpected arg for expect: ' + name);
}
if (count <= 0 && Number.isInteger(count)) {
throw Error('expected count should be a positive integer');
}
const obj = {message, count, expected_count: 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 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;
if (obj.count > 0) {
throw Error(`We did not see expected ${obj.expected_count} of '${name}': ${message}`);
} else if (obj.count < 0) {
throw Error(`We saw ${obj.expected_count - obj.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) {
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 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 = Error(`Invalid ${name} message: "${message}".`);
error.blueslip = true;
throw error;
}
};
}
lib.exception_msg = function (ex) {
return ex.message;
};
lib.start_timing = () => () => {};
lib.preview_node = (node) => 'node:' + node;
return lib;
};