1 files changed, 70 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_breakpoint-16.js b/devtools/server/tests/xpcshell/test_breakpoint-16.js
new file mode 100644
index 0000000000..a42306eee1
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_breakpoint-16.js
@@ -0,0 +1,70 @@
+/* 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 we can set breakpoints in columns, not just lines.
+ */
+
+add_task(
+  threadFrontTest(async ({ threadFront, client, debuggee }) => {
+    const packet = await executeOnNextTickAndWaitForPause(
+      () => evaluateTestCode(debuggee),
+      threadFront
+    );
+    const source = await getSourceById(threadFront, packet.frame.where.actor);
+    const location = {
+      sourceUrl: source.url,
+      line: debuggee.line0 + 1,
+      column: 55,
+    };
+
+    let timesBreakpointHit = 0;
+    threadFront.setBreakpoint(location, {});
+
+    while (timesBreakpointHit < 3) {
+      await resume(threadFront);
+      const packet = await waitForPause(threadFront);
+      await testAssertions(
+        packet,
+        debuggee,
+        source,
+        location,
+        timesBreakpointHit
+      );
+
+      timesBreakpointHit++;
+    }
+
+    threadFront.removeBreakpoint(location);
+    await threadFront.resume();
+  })
+);
+
+function evaluateTestCode(debuggee) {
+  // prettier-ignore
+  Cu.evalInSandbox(
+    "var line0 = Error().lineNumber;\n" +
+    "(function () { debugger; this.acc = 0; for (var i = 0; i < 3; i++) this.acc++; }());",
+    debuggee
+  );
+}
+
+async function testAssertions(
+  packet,
+  debuggee,
+  source,
+  location,
+  timesBreakpointHit
+) {
+  Assert.equal(packet.why.type, "breakpoint");
+  Assert.equal(packet.frame.where.actor, source.actor);
+  Assert.equal(packet.frame.where.line, location.line);
+  Assert.equal(packet.frame.where.column, location.column);
+
+  Assert.equal(debuggee.acc, timesBreakpointHit);
+  const environment = await packet.frame.getEnvironment();
+  Assert.equal(environment.bindings.variables.i.value, timesBreakpointHit);
+}