Unexpected token '[' when running Solidity test - node.js

Question

I'm currently running a Mocha test of my Solidity contract but it throws error which is related to compiler code.
C:\eth\compile.js:8
modules.exports = solc.compile(source).[];
SyntaxError: Unexpected token '['
at wrapSafe (internal/modules/cjs/loader.js:979:16)
at Module._compile (internal/modules/cjs/loader.js:1027:27)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
at Module.load (internal/modules/cjs/loader.js:928:32)
at Function.Module._load (internal/modules/cjs/loader.js:769:14)
at Module.require (internal/modules/cjs/loader.js:952:19)
at require (internal/modules/cjs/helpers.js:88:18)
at Object.<anonymous> (C:\eth\test\inbox.test.js:5:31)
at Module._compile (internal/modules/cjs/loader.js:1063:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
at Module.load (internal/modules/cjs/loader.js:928:32)
at Function.Module._load (internal/modules/cjs/loader.js:769:14)
at Module.require (internal/modules/cjs/loader.js:952:19)
at require (internal/modules/cjs/helpers.js:88:18)
at Object.exports.requireOrImport (C:\eth\node_modules\mocha\lib\esm-utils.js:42:12)
at Object.exports.loadFilesAsync (C:\eth\node_modules\mocha\lib\esm-utils.js:55:34)
at Mocha.loadFilesAsync (C:\eth\node_modules\mocha\lib\mocha.js:473:19)
at singleRun (C:\eth\node_modules\mocha\lib\cli\run-helpers.js:125:15)
at exports.runMocha (C:\eth\node_modules\mocha\lib\cli\run-helpers.js:190:10)
at Object.exports.handler (C:\eth\node_modules\mocha\lib\cli\run.js:362:11)
at C:\eth\node_modules\mocha\node_modules\yargs\build\index.cjs:443:71
The compiler itself is:
const path = require('path');
const fs = require('fs');
const solc = require('solc');
const inboxPath = path.resolve(__dirname, 'contracts', 'inbox.sol');
const source = fs.readFileSync(inboxPath, 'utf8');
modules.exports = solc.compile(source).[:Inbox];

Answer 1

You need to pass the JSON-stringified options object (to the compile() function), not just the text source. See the example in the readme.
Your solc.compile(source).[:Inbox] code has syntax errors (combining access to property with . and array with [) and logical errors (undefined :Inbox, incorrect path to the compiled result, trying to access a JSON string as an object).
Asssuming that inbox.sol contains contract Inbox that is the main contract you want to compile, this is a working code replacement for the last line in your question:
const options = {
language: 'Solidity',
sources: {
'inbox.sol': {
content: source
}
},
settings: {
outputSelection: {
'*': {
'*': ['*']
}
}
}
};
const compiledRaw = solc.compile(JSON.stringify(options));
const compiledObj = JSON.parse(compiledRaw);
const compiledInboxContract = compiledObj.contracts['inbox.sol']['Inbox'];
//console.log(compiledInboxContract)
module.exports = compiledInboxContract;