Quelle  test_breakpoint-03.js

/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */
/* eslint-disable no-shadow, max-nested-callbacks */

"use strict";

/**
 * Check that setting a breakpoint on a line without code will skip
 * forward when we know the script isn't GCed (the debugger is connected,
 * so it's kept alive).
 */

var test_no_skip_breakpoint = async function (source, location, debuggee) {
  const [response, bpClient] = await source.setBreakpoint(
    Object.assign({}, location, { noSliding: true })
  );

  Assert.ok(!response.actualLocation);
  Assert.equal(bpClient.location.line, debuggee.line0 + 3);
  await bpClient.remove();
};

add_task(
  threadFrontTest(({ threadFront, debuggee }) => {
    return new Promise(resolve => {
      threadFront.once("paused", async function (packet) {
        const location = { line: debuggee.line0 + 3 };
        const source = await getSourceById(
          threadFront,
          packet.frame.where.actor
        );
        // First, make sure that we can disable sliding with the
        // `noSliding` option.
        await test_no_skip_breakpoint(source, location, debuggee);

        // Now make sure that the breakpoint properly slides forward one line.
        const [response, bpClient] = await source.setBreakpoint(location);
        Assert.ok(!!response.actualLocation);
        Assert.equal(response.actualLocation.source.actor, source.actor);
        Assert.equal(response.actualLocation.line, location.line + 1);

        threadFront.once("paused", function (packet) {
          // Check the return value.
          Assert.equal(packet.frame.where.actor, source.actor);
          Assert.equal(packet.frame.where.line, location.line + 1);
          Assert.equal(packet.why.type, "breakpoint");
          Assert.equal(packet.why.actors[0], bpClient.actor);
          // Check that the breakpoint worked.
          Assert.equal(debuggee.a, 1);
          Assert.equal(debuggee.b, undefined);

          // Remove the breakpoint.
          bpClient.remove(function () {
            threadFront.resume().then(resolve);
          });
        });

        threadFront.resume();
      });

      // Use `evalInSandbox` to make the debugger treat it as normal
      // globally-scoped code, where breakpoint sliding rules apply.
      // prettier-ignore
      Cu.evalInSandbox(
        "var line0 = Error().lineNumber;\n" +
        "debugger;\n" +      // line0 + 1
        "var a = 1;\n" +     // line0 + 2
        "// A comment.\n" +  // line0 + 3
        "var b = 2;",        // line0 + 4
        debuggee
      );
    });
  })
);