@stryker-mutator/core
Version:
The extendable JavaScript mutation testing framework
76 lines • 2.27 kB
JavaScript
import treeKill from 'tree-kill';
import { StrykerError } from '@stryker-mutator/util';
export const objectUtils = {
/**
* Calls a defined callback function on each element of a map, and returns an array that contains the results.
*
* @param subject The map to act on
* @param callbackFn The callback fn
* @returns
*/
map(subject, callbackFn) {
const results = [];
subject.forEach((value, key) => results.push(callbackFn(value, key)));
return results;
},
/**
* A wrapper around `process.env` (for testability)
*/
getEnvironmentVariable(nameEnvironmentVariable) {
return process.env[nameEnvironmentVariable];
},
undefinedEmptyString(str) {
if (str) {
return str;
}
return undefined;
},
getEnvironmentVariableOrThrow(name) {
const value = this.getEnvironmentVariable(name);
if (value === undefined) {
throw new StrykerError(`Missing environment variable "${name}"`);
}
else {
return value;
}
},
isWarningEnabled(warningType, warningOptions) {
if (typeof warningOptions === 'boolean') {
return warningOptions;
}
else {
return !!warningOptions[warningType];
}
},
/**
* A wrapper around `process.exitCode = n` (for testability)
*/
setExitCode(n) {
process.exitCode = n;
},
kill(pid) {
return new Promise((res, rej) => {
treeKill(pid, 'SIGKILL', (err) => {
if (err && !canIgnore(err.code)) {
rej(err);
}
else {
res();
}
});
function canIgnore(code) {
// https://docs.microsoft.com/en-us/windows/desktop/Debug/system-error-codes--0-499-
// these error codes mean the program is _already_ closed.
return code === 255 || code === 128;
}
});
},
/**
* Creates a random integer number.
* @returns A random integer.
*/
random() {
return Math.ceil(Math.random() * 10000000);
},
};
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