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// SPDX-License-Identifier: AGPL-3.0-or-later
// Hybrid mocklib for adblock-fast functional tests.
//
// Key difference from mwan4's mocklib:
// - Does NOT mock the 'fs' module (real filesystem operations)
// - Selectively overrides system() to block service management
// while passing through data-processing commands (sed/sort/grep/awk)
// - Mocks only 'uci' and 'ubus'
'use strict';
if (!exists(global, 'REQUIRE_SEARCH_PATH'))
global.REQUIRE_SEARCH_PATH = [];
if (!exists(global, 'MOCK_SEARCH_PATH'))
global.MOCK_SEARCH_PATH = [];
if (!exists(global, 'TRACE_CALLS'))
global.TRACE_CALLS = null;
let _fs = require("fs");
// Force reloading uci and ubus modules so our mocks intercept them.
// Do NOT delete fs -- we want the REAL filesystem module.
delete global.modules.uci;
delete global.modules.ubus;
let _log = (level, fmt, ...args) => {
let color, prefix;
switch (level) {
case 'info':
color = 34;
prefix = '!';
break;
case 'warn':
color = 33;
prefix = 'W';
break;
case 'error':
color = 31;
prefix = 'E';
break;
default:
color = 0;
prefix = 'I';
}
let f = sprintf("\u001b[%d;1m[%s] %s\u001b[0m", color, prefix, fmt);
warn(replace(sprintf(f, ...args), "\n", "\n "), "\n");
};
let format_json = (data) => {
let rv;
let format_value = (value) => {
switch (type(value)) {
case "object":
return sprintf("{ /* %d keys */ }", length(value));
case "array":
return sprintf("[ /* %d items */ ]", length(value));
case "string":
if (length(value) > 64)
value = substr(value, 0, 64) + "...";
return sprintf("%J", value);
default:
return sprintf("%J", value);
}
};
switch (type(data)) {
case "object":
rv = "{";
let k = sort(keys(data));
for (let i, n in k)
rv += sprintf("%s %J: %s", i ? "," : "", n, format_value(data[n]));
rv += " }";
break;
case "array":
rv = "[";
for (let i, v in data)
rv += (i ? "," : "") + " " + format_value(v);
rv += " ]";
break;
default:
rv = format_value(data);
}
return rv;
};
let read_data_file = (path) => {
for (let dir in MOCK_SEARCH_PATH) {
let fd = _fs.open(dir + '/' + path, "r");
if (fd) {
let data = fd.read("all");
fd.close();
return data;
}
}
return null;
};
let read_json_file = (path) => {
let data = read_data_file(path);
if (data != null) {
try {
return json(data);
}
catch (e) {
_log('error', "Unable to parse JSON data in %s: %s", path, e);
return NaN;
}
}
return null;
};
let trace_call = (ns, func, args) => {
let msg = "[call] " +
(ns ? ns + "." : "") +
func;
for (let k, v in args) {
msg += ' ' + k + ' <';
switch (type(v)) {
case "array":
case "object":
msg += format_json(v);
break;
default:
msg += v;
}
msg += '>';
}
switch (TRACE_CALLS) {
case '1':
case 'stdout':
_fs.stdout.write(msg + "\n");
break;
case 'stderr':
_fs.stderr.write(msg + "\n");
break;
}
};
// Prepend mocklib/ to REQUIRE_SEARCH_PATH so mock uci/ubus are found
for (let pattern in REQUIRE_SEARCH_PATH) {
if (!match(pattern, /\*\.uc$/))
continue;
let path = replace(pattern, /\*/, 'mocklib'),
s = _fs.stat(path);
if (!s || s.type != 'file')
continue;
if (!length(global.MOCK_SEARCH_PATH))
global.MOCK_SEARCH_PATH = [ replace(path, /mocklib\.uc$/, '../mocks') ];
unshift(REQUIRE_SEARCH_PATH, replace(path, /mocklib\.uc$/, 'mocklib/*.uc'));
break;
}
if (!length(global.MOCK_SEARCH_PATH))
global.MOCK_SEARCH_PATH = [ './mocks' ];
// Register global mocklib namespace
global.mocklib = {
require: function(module) {
let path, res, ex;
if (type(REQUIRE_SEARCH_PATH) == "array" && index(REQUIRE_SEARCH_PATH[0], 'mocklib/*.uc') != -1)
path = shift(REQUIRE_SEARCH_PATH);
try {
res = require(module);
}
catch (e) {
ex = e;
}
if (path)
unshift(REQUIRE_SEARCH_PATH, path);
if (ex)
die(ex);
return res;
},
I: (...args) => _log('info', ...args),
N: (...args) => _log('notice', ...args),
W: (...args) => _log('warn', ...args),
E: (...args) => _log('error', ...args),
format_json,
read_data_file,
read_json_file,
trace_call,
};
// Selectively override system() -- block service management, pass through data processing
global.system = ((_orig_system) => function(argv, timeout) {
let cmd = '' + argv;
// Block commands that interact with system services or would hang
if (match(cmd, /^\/etc\/init\.d\//) ||
match(cmd, /\/usr\/bin\/logger\b/) ||
match(cmd, /^logger\b/) ||
match(cmd, /^sleep\b/) ||
match(cmd, /^resolveip\b/) ||
match(cmd, /^dnsmasq\s+--test/) ||
match(cmd, /^ipset\b/) ||
match(cmd, /^nft\b/) ||
match(cmd, /^chmod\b/) ||
match(cmd, /^chown\b/)) {
trace_call(null, "system[blocked]", { command: cmd });
return 0;
}
// Pass through real commands for data processing
return _orig_system(argv, timeout);
})(global.system);
// Override time() to return fixed value for reproducible tests
global.time = function() {
return 1615382640;
};
// Override getenv -- return null to prevent env interference
global.getenv = function(key) {
return null;
};
return global.mocklib;
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