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// Flags: --expose-internals
'use strict';
const common = require('../common');
common.skipIfInspectorDisabled();
const assert = require('assert');
const inspector = require('inspector');
const path = require('path');
const { pathToFileURL } = require('url');
// This test case will set a breakpoint 4 lines below
function debuggedFunction() {
let i;
let accum = 0;
for (i = 0; i < 5; i++) {
accum += i;
}
return accum;
}
let scopeCallback = null;
function checkScope(session, scopeId) {
session.post('Runtime.getProperties', {
'objectId': scopeId,
'ownProperties': false,
'accessorPropertiesOnly': false,
'generatePreview': true
}, scopeCallback);
}
function debuggerPausedCallback(session, notification) {
const params = notification.params;
const callFrame = params.callFrames[0];
const scopeId = callFrame.scopeChain[0].object.objectId;
checkScope(session, scopeId);
}
function waitForWarningSkipAsyncStackTraces(resolve) {
process.once('warning', function(warning) {
if (warning.code === 'INSPECTOR_ASYNC_STACK_TRACES_NOT_AVAILABLE') {
waitForWarningSkipAsyncStackTraces(resolve);
} else {
resolve(warning);
}
});
}
async function testNoCrashWithExceptionInCallback() {
// There is a deliberate exception in the callback
const session = new inspector.Session();
session.connect();
const error = new Error('We expect this');
console.log('Expecting warning to be emitted');
const promise = new Promise(waitForWarningSkipAsyncStackTraces);
session.post('Console.enable', () => { throw error; });
assert.strictEqual(await promise, error);
session.disconnect();
}
function testSampleDebugSession() {
let cur = 0;
const failures = [];
const expects = {
i: [0, 1, 2, 3, 4],
accum: [0, 0, 1, 3, 6]
};
scopeCallback = function(error, result) {
const i = cur++;
let v, actual, expected;
for (v of result.result) {
actual = v.value.value;
expected = expects[v.name][i];
if (actual !== expected) {
failures.push(`Iteration ${i} variable: ${v.name} ` +
`expected: ${expected} actual: ${actual}`);
}
}
};
const session = new inspector.Session();
session.connect();
session.on('Debugger.paused',
(notification) => debuggerPausedCallback(session, notification));
let cbAsSecondArgCalled = false;
assert.throws(() => {
session.post('Debugger.enable', function() {}, function() {});
}, TypeError);
session.post('Debugger.enable', () => cbAsSecondArgCalled = true);
session.post('Debugger.setBreakpointByUrl', {
'lineNumber': 14,
'url': pathToFileURL(path.resolve(__dirname, __filename)).toString(),
'columnNumber': 0,
'condition': ''
});
debuggedFunction();
assert.deepStrictEqual(cbAsSecondArgCalled, true);
assert.deepStrictEqual(failures, []);
assert.strictEqual(cur, 5);
scopeCallback = null;
session.disconnect();
assert.throws(() => session.post('Debugger.enable'), (e) => !!e);
}
async function testNoCrashConsoleLogBeforeThrow() {
const session = new inspector.Session();
session.connect();
let attempt = 1;
process.on('warning', common.mustCall(3));
session.on('inspectorNotification', () => {
if (attempt++ > 3)
return;
console.log('console.log in handler');
throw new Error('Exception in handler');
});
session.post('Runtime.enable');
console.log('Did not crash');
session.disconnect();
}
async function doTests() {
await testNoCrashWithExceptionInCallback();
testSampleDebugSession();
let breakpointHit = false;
scopeCallback = () => (breakpointHit = true);
debuggedFunction();
assert.strictEqual(breakpointHit, false);
testSampleDebugSession();
await testNoCrashConsoleLogBeforeThrow();
}
doTests();
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