stack-trace-parser

stack-trace-parser parses stack traces

Examples

Error exception

From example.js:

var stackTraceParser = require('./src/parser')
    assert = require('assert');

try {
  throw new Error('just got real');
}
catch (exception) {
  var stackTrace = stackTraceParser.parse(exception);

  assert(stackTrace.type === 'Error', "Expected stack trace type to be Error but instead it is " + stackTrace.type);
  assert.strictEqual(stackTrace.message, 'just got real', "Expected stack trace message to be 'just got real' but instead it is: " + stackTrace.message);
  assert(stackTrace[0].fileName.indexOf('example.js') !== -1, "Expected file name to contain 'example.js'!");
  assert.strictEqual(stackTrace[0].lineNumber, 5, "Expected line number to match line 5 of this file!");
  assert.strictEqual(stackTrace[0].columnNumber, 9, "Expected column number to match column 9 of this file!");
}

ReferenceError exception

From example-undefined.js:

var stackTraceParser = require('./src/parser')
    assert = require('assert');

try {
  d = d * 2;
}
catch (exception) {
  var stackTrace = stackTraceParser.parse(exception);

  assert(stackTrace.type === 'ReferenceError', "Expected stack trace type to be ReferenceError but instead it is " + stackTrace.type);
  assert.strictEqual(stackTrace.message, 'd is not defined', "Expected stack trace message to be 'd is not defined' but instead it is: " + stackTrace.message);
  assert(stackTrace[0].fileName.indexOf('example-undefined.js') !== -1, "Expected file name to contain 'example-undefined.js'!");
  assert.strictEqual(stackTrace[0].lineNumber, 5, "Expected line number to match line 5 of this file not " + stackTrace[0].lineNumber);
  assert.strictEqual(stackTrace[0].columnNumber, 7, "Expected column number to match column 7 of this file not " + stackTrace[0].columnNumber);
}

Handling eval exception

From example-eval.js:

var stackTraceParser = require('./src/parser')
    assert = require('assert');

try {
  var code =
    'var a = 10;\n' +
    '\n' +
    'a = a * z;';

  eval(code);
}
catch (exception) {
  var stackTrace = stackTraceParser.parse(exception);

  assert(stackTrace.type === 'ReferenceError', "Expected stack trace type to be ReferenceError but instead it is " + stackTrace.type);
  assert.strictEqual(stackTrace.message, 'z is not defined', "Expected stack trace message to be 'd is not defined' but instead it is: " + stackTrace.message);
  assert(stackTrace[0].isEval, "Expected first line of stack trace to be for eval");
  assert.strictEqual(stackTrace[0].evalLineNumber, 3, "Expected line number of eval to be 3 but instead " + stackTrace[0].evalLineNumber);
  assert.strictEqual(stackTrace[0].evalColumnNumber, 9, "Expected line number of eval to be 9 but instead " + stackTrace[0].evalColumnNumber);
}