1 files changed, 45 insertions, 0 deletions
diff --git a/devtools/shared/tests/unit/test_stack.js b/devtools/shared/tests/unit/test_stack.js
new file mode 100644
index 000000000..ef747c83f
--- /dev/null
+++ b/devtools/shared/tests/unit/test_stack.js
@@ -0,0 +1,45 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test stack.js.
+
+function run_test() {
+  let loader = new DevToolsLoader();
+  let require = loader.require;
+
+  const {StackFrameCache} = require("devtools/server/actors/utils/stack");
+
+  let cache = new StackFrameCache();
+  cache.initFrames();
+  let baseFrame = {
+    line: 23,
+    column: 77,
+    source: "nowhere",
+    functionDisplayName: "nobody",
+    parent: null,
+    asyncParent: null,
+    asyncCause: null
+  };
+  cache.addFrame(baseFrame);
+
+  let event = cache.makeEvent();
+  do_check_eq(event[0], null);
+  do_check_eq(event[1].functionDisplayName, "nobody");
+  do_check_eq(event.length, 2);
+
+  cache.addFrame({
+    line: 24,
+    column: 78,
+    source: "nowhere",
+    functionDisplayName: "still nobody",
+    parent: null,
+    asyncParent: baseFrame,
+    asyncCause: "async"
+  });
+
+  event = cache.makeEvent();
+  do_check_eq(event[0].functionDisplayName, "still nobody");
+  do_check_eq(event[0].parent, 0);
+  do_check_eq(event[0].asyncParent, 1);
+  do_check_eq(event.length, 1);
+}