1 files changed, 78 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_breakpoint-13.js b/devtools/server/tests/xpcshell/test_breakpoint-13.js
new file mode 100644
index 0000000000..2265f3449a
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_breakpoint-13.js
@@ -0,0 +1,78 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Check that execution doesn't pause twice while stepping, when encountering
+ * either a breakpoint or a debugger statement.
+ */
+
+add_task(
+  threadFrontTest(async ({ threadFront, debuggee }) => {
+    const packet = await executeOnNextTickAndWaitForPause(
+      () => evaluateTestCode(debuggee),
+      threadFront
+    );
+
+    const source = await getSourceById(threadFront, packet.frame.where.actor);
+    await threadFront.setBreakpoint(
+      { sourceUrl: source.url, line: 3, column: 6 },
+      {}
+    );
+
+    info("Check that the stepping worked.");
+    const packet1 = await stepIn(threadFront);
+    Assert.equal(packet1.frame.where.line, 6);
+    Assert.equal(packet1.why.type, "resumeLimit");
+
+    info("Entered the foo function call frame.");
+    const packet2 = await stepIn(threadFront);
+    Assert.equal(packet2.frame.where.line, 3);
+    Assert.equal(packet2.why.type, "resumeLimit");
+
+    info("Check that the breakpoint wasn't the reason for this pause");
+    const packet3 = await stepIn(threadFront);
+    Assert.equal(packet3.frame.where.line, 4);
+    Assert.equal(packet3.why.type, "resumeLimit");
+    Assert.equal(packet3.why.frameFinished.return.type, "undefined");
+
+    info("Check that the debugger statement wasn't the reason for this pause.");
+    const packet4 = await stepIn(threadFront);
+    Assert.equal(debuggee.a, 1);
+    Assert.equal(debuggee.b, undefined);
+    Assert.equal(packet4.frame.where.line, 7);
+    Assert.equal(packet4.why.type, "resumeLimit");
+
+    info("Check that the debugger statement wasn't the reason for this pause.");
+    const packet5 = await stepIn(threadFront);
+    Assert.equal(packet5.frame.where.line, 8);
+    Assert.equal(packet5.why.type, "resumeLimit");
+
+    info("Remove the breakpoint and finish.");
+    await stepIn(threadFront);
+    threadFront.removeBreakpoint({ sourceUrl: source.url, line: 3 });
+
+    await resume(threadFront);
+  })
+);
+
+function evaluateTestCode(debuggee) {
+  /* eslint-disable */
+  Cu.evalInSandbox(
+    `
+  function foo() {
+    this.a = 1; // <-- breakpoint set here
+  }
+  debugger;
+  foo();
+  debugger;
+  var b = 2;
+  `,
+    debuggee,
+    "1.8",
+    "test_breakpoint-13.js",
+    1
+  );
+  /* eslint-enable */
+}