browser_dbg-features-breakable-positions.js

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */

"use strict";

const testServer = createVersionizedHttpTestServer(
  "examples/sourcemaps-reload-uncompressed"
);
const TEST_URL = testServer.urlFor("index.html");

// getTokenFromPosition pauses 0.5s for each line,
// so this test is quite slow to complete
requestLongerTimeout(4);

/**
 * Cover the breakpoints positions/columns:
 * - assert that the UI displayed markers in CodeMirror next to each breakable columns,
 * - assert the data in the reducers about the breakable columns.
 *
 * Note that it doesn't assert that the breakpoint can be hit.
 * It only verify data integrity and the UI.
 */
add_task(async function testBreakableLinesOverReloads() {
  const dbg = await initDebuggerWithAbsoluteURL(
    TEST_URL,
    "index.html",
    "script.js",
    "original.js"
  );

  info("Assert breakable lines of the first html page load");
  await assertBreakablePositions(dbg, "index.html", 78, [
    { line: 16, columns: [6, 14] },
    { line: 17, columns: [] },
    { line: 21, columns: [12, 20, 48] },
    { line: 24, columns: [12, 20] },
    { line: 25, columns: [] },
    { line: 30, columns: [] },
    { line: 36, columns: [] },
  ]);

  info("Pretty print first html page load and assert breakable lines");
  await prettyPrint(dbg);
  await assertBreakablePositions(dbg, "index.html:formatted", 87, [
    { line: 16, columns: [0, 8] },
    { line: 22, columns: [0, 8, 35] },
    { line: 27, columns: [0, 8] },
    { line: 28, columns: [] },
    { line: 36, columns: [] },
  ]);
  await closeTab(dbg, "index.html:formatted");

  info("Assert breakable lines of the first original source file, original.js");
  // The length of original.js is longer than the test file
  // because the sourcemap replaces the content of the original file
  // and appends a few lines with a "WEBPACK FOOTER" comment
  // All the appended lines are empty lines or comments, so none of them are breakable.
  await assertBreakablePositions(dbg, "original.js", 15, [
    { line: 1, columns: [] },
    { line: 2, columns: [2, 9, 32] },
    { line: 3, columns: [] },
    { line: 5, columns: [] },
    { line: 8, columns: [2, 8] },
    { line: 9, columns: [2, 10] },
    { line: 10, columns: [] },
  ]);

  info("Assert breakable lines of the simple first load of script.js");
  await assertBreakablePositions(dbg, "script.js", 9, [