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stackTrace.js
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stackTrace.js
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var tape = require('../');
var tap = require('tap');
var concat = require('concat-stream');
var tapParser = require('tap-parser');
var yaml = require('js-yaml');
tap.test('preserves stack trace with newlines', function (tt) {
tt.plan(3);
var test = tape.createHarness();
var stream = test.createStream();
var parser = stream.pipe(tapParser());
var stackTrace = 'foo\n bar';
parser.once('assert', function (data) {
delete data.diag.at;
tt.deepEqual(data, {
ok: false,
id: 1,
name: "Error: Preserve stack",
diag: {
stack: stackTrace,
operator: 'error',
expected: 'undefined',
actual: '[Error: Preserve stack]'
}
});
});
stream.pipe(concat(function (body) {
var body = body.toString('utf8');
body = stripAt(body);
tt.equal(
body,
'TAP version 13\n'
+ '# multiline stack trace\n'
+ 'not ok 1 Error: Preserve stack\n'
+ ' ---\n'
+ ' operator: error\n'
+ ' expected: |-\n'
+ ' undefined\n'
+ ' actual: |-\n'
+ ' [Error: Preserve stack]\n'
+ ' stack: |-\n'
+ ' foo\n'
+ ' bar\n'
+ ' ...\n'
+ '\n'
+ '1..1\n'
+ '# tests 1\n'
+ '# pass 0\n'
+ '# fail 1\n'
);
tt.deepEqual(getDiag(body), {
stack: stackTrace,
operator: 'error',
expected: 'undefined',
actual: '[Error: Preserve stack]'
});
}));
test('multiline stack trace', function (t) {
t.plan(1);
var err = new Error('Preserve stack');
err.stack = stackTrace;
t.error(err);
});
});
tap.test('preserves stack trace for failed assertions', function (tt) {
tt.plan(6);
var test = tape.createHarness();
var stream = test.createStream();
var parser = stream.pipe(tapParser());
var stack = ''
parser.once('assert', function (data) {
tt.equal(typeof data.diag.at, 'string');
tt.equal(typeof data.diag.stack, 'string');
at = data.diag.at || '';
stack = data.diag.stack || '';
tt.ok(/^Error: true should be false(\n at .+)+/.exec(stack), 'stack should be a stack')
tt.deepEqual(data, {
ok: false,
id: 1,
name: "true should be false",
diag: {
at: at,
stack: stack,
operator: 'equal',
expected: false,
actual: true
}
});
});
stream.pipe(concat(function (body) {
var body = body.toString('utf8');
body = stripAt(body);
tt.equal(
body,
'TAP version 13\n'
+ '# t.equal stack trace\n'
+ 'not ok 1 true should be false\n'
+ ' ---\n'
+ ' operator: equal\n'
+ ' expected: false\n'
+ ' actual: true\n'
+ ' stack: |-\n'
+ ' '
+ stack.replace(/\n/g, '\n ') + '\n'
+ ' ...\n'
+ '\n'
+ '1..1\n'
+ '# tests 1\n'
+ '# pass 0\n'
+ '# fail 1\n'
);
tt.deepEqual(getDiag(body), {
stack: stack,
operator: 'equal',
expected: false,
actual: true
});
}));
test('t.equal stack trace', function (t) {
t.plan(1);
t.equal(true, false, 'true should be false');
});
});
tap.test('preserves stack trace for failed assertions where actual===falsy', function (tt) {
tt.plan(6);
var test = tape.createHarness();
var stream = test.createStream();
var parser = stream.pipe(tapParser());
var stack = ''
parser.once('assert', function (data) {
tt.equal(typeof data.diag.at, 'string');
tt.equal(typeof data.diag.stack, 'string');
at = data.diag.at || '';
stack = data.diag.stack || '';
tt.ok(/^Error: false should be true(\n at .+)+/.exec(stack), 'stack should be a stack')
tt.deepEqual(data, {
ok: false,
id: 1,
name: "false should be true",
diag: {
at: at,
stack: stack,
operator: 'equal',
expected: true,
actual: false
}
});
});
stream.pipe(concat(function (body) {
var body = body.toString('utf8');
body = stripAt(body);
tt.equal(
body,
'TAP version 13\n'
+ '# t.equal stack trace\n'
+ 'not ok 1 false should be true\n'
+ ' ---\n'
+ ' operator: equal\n'
+ ' expected: true\n'
+ ' actual: false\n'
+ ' stack: |-\n'
+ ' '
+ stack.replace(/\n/g, '\n ') + '\n'
+ ' ...\n'
+ '\n'
+ '1..1\n'
+ '# tests 1\n'
+ '# pass 0\n'
+ '# fail 1\n'
);
tt.deepEqual(getDiag(body), {
stack: stack,
operator: 'equal',
expected: true,
actual: false
});
}));
test('t.equal stack trace', function (t) {
t.plan(1);
t.equal(false, true, 'false should be true');
});
});
function getDiag (body) {
var yamlStart = body.indexOf(' ---');
var yamlEnd = body.indexOf(' ...\n');
var diag = body.slice(yamlStart, yamlEnd).split('\n').map(function (line) {
return line.slice(2);
}).join('\n');
// Get rid of 'at' variable (which has a line number / path of its own that's
// difficult to check).
var withStack = yaml.safeLoad(diag);
delete withStack.at;
return withStack;
}
function stripAt (body) {
return body.replace(/^\s*at:\s+Test.*$\n/m, '');
}