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diff --git a/devtools/server/tests/xpcshell/test_watchpoint-02.js b/devtools/server/tests/xpcshell/test_watchpoint-02.js
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+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+/* eslint-disable no-shadow */
+
+"use strict";
+
+/*
+Test that debugger advances instead of pausing twice on the
+same line when encountering both a watchpoint and a breakpoint.
+*/
+
+add_task(
+ threadFrontTest(async args => {
+ await testBreakpointAndSetWatchpoint(args);
+ await testBreakpointAndGetWatchpoint(args);
+ await testLoops(args);
+ })
+);
+
+// Test that we advance to the next line when a location
+// has both a breakpoint and set watchpoint.
+async function testBreakpointAndSetWatchpoint({
+ commands,
+ threadFront,
+ debuggee,
+}) {
+ async function evaluateJS(input) {
+ const { result } = await commands.scriptCommand.execute(input, {
+ frameActor: packet.frame.actorID,
+ });
+ return result;
+ }
+
+ function evaluateTestCode(debuggee) {
+ /* eslint-disable */
+ Cu.evalInSandbox(
+ ` // 1
+ function stopMe(obj) { // 2
+ debugger; // 3
+ obj.a = 2; // 4
+ debugger; // 5
+ } //
+ stopMe({a: 1})`,
+ debuggee,
+ "1.8",
+ "test_watchpoint-02.js"
+ );
+ /* eslint-disable */
+ }
+
+ const packet = await executeOnNextTickAndWaitForPause(
+ () => evaluateTestCode(debuggee),
+ threadFront
+ );
+
+ info("Test that we pause on the debugger statement.");
+ Assert.equal(packet.frame.where.line, 3);
+ Assert.equal(packet.why.type, "debuggerStatement");
+
+ info("Add set watchpoint.");
+ const args = packet.frame.arguments;
+ const obj = args[0];
+ const objClient = threadFront.pauseGrip(obj);
+ await objClient.addWatchpoint("a", "obj.a", "set");
+
+ info("Add breakpoint.");
+ const source = await getSourceById(threadFront, packet.frame.where.actor);
+
+ const location = {
+ sourceUrl: source.url,
+ line: 4,
+ };
+
+ threadFront.setBreakpoint(location, {});
+
+ info("Test that pause occurs on breakpoint.");
+ const packet2 = await resumeAndWaitForPause(threadFront);
+ Assert.equal(packet2.frame.where.line, 4);
+ Assert.equal(packet2.why.type, "breakpoint");
+
+ const packet3 = await resumeAndWaitForPause(threadFront);
+
+ info("Test that we pause on the second debugger statement.");
+ Assert.equal(packet3.frame.where.line, 5);
+ Assert.equal(packet3.why.type, "debuggerStatement");
+
+ info("Test that the value has updated.");
+ const result = await evaluateJS("obj.a");
+ Assert.equal(result, 2);
+
+ info("Remove breakpoint and finish.");
+ threadFront.removeBreakpoint(location, {});
+
+ await resume(threadFront);
+}
+
+// Test that we advance to the next line when a location
+// has both a breakpoint and get watchpoint.
+async function testBreakpointAndGetWatchpoint({ threadFront, debuggee }) {
+ function evaluateTestCode(debuggee) {
+ /* eslint-disable */
+ Cu.evalInSandbox(
+ ` // 1
+ function stopMe(obj) { // 2
+ debugger; // 3
+ obj.a + 4; // 4
+ debugger; // 5
+ } //
+ stopMe({a: 1})`,
+ debuggee,
+ "1.8",
+ "test_watchpoint-02.js"
+ );
+ /* eslint-disable */
+ }
+
+ const packet = await executeOnNextTickAndWaitForPause(
+ () => evaluateTestCode(debuggee),
+ threadFront
+ );
+
+ info("Test that we pause on the debugger statement.");
+ Assert.equal(packet.frame.where.line, 3);
+
+ info("Add get watchpoint.");
+ const args = packet.frame.arguments;
+ const obj = args[0];
+ const objClient = threadFront.pauseGrip(obj);
+ await objClient.addWatchpoint("a", "obj.a", "get");
+
+ info("Add breakpoint.");
+ const source = await getSourceById(threadFront, packet.frame.where.actor);
+
+ const location = {
+ sourceUrl: source.url,
+ line: 4,
+ };
+
+ threadFront.setBreakpoint(location, {});
+
+ info("Test that pause occurs on breakpoint.");
+ const packet2 = await resumeAndWaitForPause(threadFront);
+ Assert.equal(packet2.frame.where.line, 4);
+ Assert.equal(packet2.why.type, "breakpoint");
+
+ const packet3 = await resumeAndWaitForPause(threadFront);
+
+ info("Test that we pause on the second debugger statement.");
+ Assert.equal(packet3.frame.where.line, 5);
+ Assert.equal(packet3.why.type, "debuggerStatement");
+
+ info("Remove breakpoint and finish.");
+ threadFront.removeBreakpoint(location, {});
+
+ await resume(threadFront);
+}
+
+// Test that we can pause multiple times
+// on the same line for a watchpoint.
+async function testLoops({ commands, threadFront, debuggee }) {
+ async function evaluateJS(input) {
+ const { result } = await commands.scriptCommand.execute(input, {
+ frameActor: packet.frame.actorID,
+ });
+ return result;
+ }
+
+ function evaluateTestCode(debuggee) {
+ /* eslint-disable */
+ Cu.evalInSandbox(
+ ` // 1
+ function stopMe(obj) { // 2
+ let i = 0; // 3
+ debugger; // 4
+ while (i++ < 2) { // 5
+ obj.a = 2; // 6
+ } // 7
+ debugger; // 8
+ } //
+ stopMe({a: 1})`,
+ debuggee,
+ "1.8",
+ "test_watchpoint-02.js"
+ );
+ /* eslint-disable */
+ }
+
+ const packet = await executeOnNextTickAndWaitForPause(
+ () => evaluateTestCode(debuggee),
+ threadFront
+ );
+
+ info("Test that we pause on the debugger statement.");
+ Assert.equal(packet.frame.where.line, 4);
+ Assert.equal(packet.why.type, "debuggerStatement");
+
+ info("Add set watchpoint.");
+ const args = packet.frame.arguments;
+ const obj = args[0];
+ const objClient = threadFront.pauseGrip(obj);
+ await objClient.addWatchpoint("a", "obj.a", "set");
+
+ info("Test that watchpoint triggers pause on set.");
+ const packet2 = await resumeAndWaitForPause(threadFront);
+ Assert.equal(packet2.frame.where.line, 6);
+ Assert.equal(packet2.why.type, "setWatchpoint");
+ let result = await evaluateJS("obj.a");
+ Assert.equal(result, 1);
+
+ info("Test that watchpoint triggers pause on set (2nd time).");
+ const packet3 = await resumeAndWaitForPause(threadFront);
+ Assert.equal(packet3.frame.where.line, 6);
+ Assert.equal(packet3.why.type, "setWatchpoint");
+ let result2 = await evaluateJS("obj.a");
+ Assert.equal(result2, 2);
+
+ info("Test that we pause on second debugger statement.");
+ const packet4 = await resumeAndWaitForPause(threadFront);
+ Assert.equal(packet4.frame.where.line, 8);
+ Assert.equal(packet4.why.type, "debuggerStatement");
+
+ await resume(threadFront);
+}