Added tests

sentry_sdk/utils.py

@@ -1181,7 +1181,7 @@ def merge_stack_frames(frames, full_stack, client_options):
         else None
     )
     if max_stack_frames is not None:
-        new_frames = new_frames[:max_stack_frames]
+        new_frames = new_frames[len(new_frames) - max_stack_frames :]
 
     return new_frames
 

tests/test_full_stack_frames.py

@@ -0,0 +1,103 @@
+import sentry_sdk
+
+
+def test_full_stack_frames_default(sentry_init, capture_events):
+    sentry_init()
+    events = capture_events()
+
+    def foo():
+        try:
+            bar()
+        except Exception as e:
+            sentry_sdk.capture_exception(e)
+
+    def bar():
+        raise Exception("This is a test exception")
+
+    foo()
+
+    (event,) = events
+    frames = event["exception"]["values"][0]["stacktrace"]["frames"]
+
+    assert len(frames) == 2
+    assert frames[-1]["function"] == "bar"
+    assert frames[-2]["function"] == "foo"
+
+
+def test_full_stack_frames_enabled(sentry_init, capture_events):
+    sentry_init(
+        add_full_stack=True,
+    )
+    events = capture_events()
+
+    def foo():
+        try:
+            bar()
+        except Exception as e:
+            sentry_sdk.capture_exception(e)
+
+    def bar():
+        raise Exception("This is a test exception")
+
+    foo()
+
+    (event,) = events
+    frames = event["exception"]["values"][0]["stacktrace"]["frames"]
+
+    assert len(frames) > 2
+    assert frames[-1]["function"] == "bar"
+    assert frames[-2]["function"] == "foo"
+    assert frames[-3]["function"] == "foo"
+    assert frames[-4]["function"] == "test_full_stack_frames_enabled"
+
+
+def test_full_stack_frames_enabled_truncated(sentry_init, capture_events):
+    sentry_init(
+        add_full_stack=True,
+        max_stack_frames=3,
+    )
+    events = capture_events()
+
+    def foo():
+        try:
+            bar()
+        except Exception as e:
+            sentry_sdk.capture_exception(e)
+
+    def bar():
+        raise Exception("This is a test exception")
+
+    foo()
+
+    (event,) = events
+    frames = event["exception"]["values"][0]["stacktrace"]["frames"]
+
+    assert len(frames) == 3
+    assert frames[-1]["function"] == "bar"
+    assert frames[-2]["function"] == "foo"
+    assert frames[-3]["function"] == "foo"
+
+
+def test_full_stack_frames_default_no_truncation_happening(sentry_init, capture_events):
+    sentry_init(
+        max_stack_frames=1,  # this is ignored if add_full_stack=False (which is the default)
+    )
+    events = capture_events()
+
+    def foo():
+        try:
+            bar()
+        except Exception as e:
+            sentry_sdk.capture_exception(e)
+
+    def bar():
+        raise Exception("This is a test exception")
+
+    foo()
+
+    (event,) = events
+    frames = event["exception"]["values"][0]["stacktrace"]["frames"]
+
+    assert len(frames) == 2
+    assert frames[-1]["function"] == "bar"
+    assert frames[-2]["function"] == "foo"