/* *************************************************************************************
* copyright: Copyright (c) 2021 Lowell D. Thomas, all rights reserved
* license: BSD-2-Clause (https://opensource.org/licenses/BSD-2-Clause)
* ********************************************************************************* */This example will emulate the Java OData test tool. An OData parser will parse the OData test cases and verify the success or failure of each test as required. Any individual test case can also be traced.
The test cases have been converted from the original XML format to JSON format. (See the C-laguage example, ex-odata.) In the JSON format, the examples are separated into “valid”, those that parse successfully and “invalid”, those that are expected, by design, to fail. No attempt is made to match the character at which any test is expected to fail.
This main program provides for running:
module.exports = function main(args) {
/* display the program arguments */
console.log('odata args');
console.dir(args);
/* the help screen */
let desc = '';
desc += 'The OData example demonstrates parsing the OData grammar and executing the parser\n';
desc += 'against the large set of test cases given at https://github.com/oasis-tcs/odata-abnf.\n';
let help = '';
help += 'Usage: npm run odata [-- args]\n';
help += ' args: help (or no arg) to display this help screen.\n';
help += ' valid run all of the valid test cases\n';
help += ' invalid run all of the test cases expected to fail\n';
help += ' all-cases run all of the test cases\n';
help += ' trace n parse and trace the nth test case where n is an index from the list\n';
help += ' all run all demonstrations\n';
if (!args[0]) {
/* display the help screen and exit */
console.log(desc);
console.log(help);
return;
}
/* select the test to run */
let index;
switch (args[0]) {
case 'help':
console.log(help);
return;
case 'valid':
console.log('\nDemonstrate: run all of the valid test cases');
require('./run')('valid');
break;
case 'invalid':
console.log('\nDemonstrate: run all of the test cases expected to fail');
require('./run')('invalid');
break;
case 'all-cases':
console.log('\nDemonstrate: run all of the test cases');
require('./run')('all');
break;
case 'trace':
console.log('\nDemonstrate: parse and trace the nth test case where n is an index from the list');
if (args[1] === undefined) {
console.log('trace requires and integer index argument');
console.log();
console.log(help);
break;
}
index = parseInt(args[1], 10);
if (Number.isNaN(index)) {
console.log(`index argument = ${args[1]} but must be a number`);
console.log();
console.log(help);
break;
}
require('./run')('trace', index);
break;
case 'all':
console.log('\nDemonstrate: run all of the valid test cases');
require('./run')('valid');
console.log('\nDemonstrate: run all of the test cases expected to fail');
require('./run')('invalid');
console.log('\nDemonstrate: run all of the test cases');
require('./run')('all');
console.log('\nDemonstrate: parse and trace the 10th test case where 10 is an index from the list');
index = 10;
if (Number.isNaN(index)) {
console.log(`index argument = ${args[1]} but must be a number`);
console.log();
console.log(help);
break;
}
require('./run')('trace', index);
break;
default:
console.log(`unrecognized argument: ${args[0]}`);
console.log(help);
}
};