npm test failed

[htamakos]

Issue Description

According to README, I ran tests. But errors occured like below.

$ npm test

> [email protected] test /Users/htamakos/.ghq/github.com/oracle/pgx-client-js
> mocha

/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/yargs/yargs.js:1163
      else throw err
           ^

TypeError [ERR_INVALID_ARG_TYPE]: The "id" argument must be of type string. Received type undefined
    at validateString (internal/validators.js:107:11)
    at Module.require (internal/modules/cjs/loader.js:659:3)
    at require (internal/modules/cjs/helpers.js:16:16)
    at Object.<anonymous> (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/test/common.js:3:13)
    at Module._compile (internal/modules/cjs/loader.js:759:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:770:10)
    at Module.load (internal/modules/cjs/loader.js:628:32)
    at Function.Module._load (internal/modules/cjs/loader.js:555:12)
    at Module.require (internal/modules/cjs/loader.js:666:19)
    at require (internal/modules/cjs/helpers.js:16:16)
    at Object.<anonymous> (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/test/algorithms.js:4:16)
    at Module._compile (internal/modules/cjs/loader.js:759:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:770:10)
    at Module.load (internal/modules/cjs/loader.js:628:32)
    at Function.Module._load (internal/modules/cjs/loader.js:555:12)
    at Module.require (internal/modules/cjs/loader.js:666:19)
    at require (internal/modules/cjs/helpers.js:16:16)
    at /Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/mocha/lib/mocha.js:330:36
    at Array.forEach (<anonymous>)
    at Mocha.loadFiles (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/mocha/lib/mocha.js:327:14)
    at Mocha.run (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/mocha/lib/mocha.js:804:10)
    at Object.exports.singleRun (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/mocha/lib/cli/run-helpers.js:207:16)
    at exports.runMocha (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/mocha/lib/cli/run-helpers.js:300:13)
    at Object.exports.handler (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/mocha/lib/cli/run.js:296:3)
    at Object.runCommand (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/yargs/lib/command.js:242:26)
    at Object.parseArgs [as _parseArgs] (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/yargs/yargs.js:1104:24)
    at Object.parse (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/yargs/yargs.js:566:25)
    at Object.exports.main (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/mocha/lib/cli/cli.js:63:6)
    at Object.<anonymous> (/Users/htamakos/.ghq/github.com/oracle/pgx-client-js/node_modules/mocha/bin/_mocha:10:23)
    at Module._compile (internal/modules/cjs/loader.js:759:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:770:10)
    at Module.load (internal/modules/cjs/loader.js:628:32)
    at Function.Module._load (internal/modules/cjs/loader.js:555:12)
    at Function.Module.runMain (internal/modules/cjs/loader.js:824:10)
    at internal/main/run_main_module.js:17:11
npm ERR! Test failed.  See above for more details.

Cause

At test/common.js, ORACLE_PGX_DIR environment variable is needed to load pgx-client-js module. But when npm test command is executed, this environment variable is not set. So Error (TypeError [ERR_INVALID_ARG_TYPE]: The "id" argument must be of type string. Received type undefined) is occured.

https://github.com/oracle/pgx-client-js/blob/master/test/common.js#L3