Fixed #1792: Sorting literals sometimes ignored when placed on first few lines of file.

3 files changed, 46 insertions, 1 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8085c36..f271a3c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ Find out more about isort's release policy [here](https://pycqa.github.io/isort/
   - Made all exceptions pickleable.
   - Fixed #1779: Pylama integration ignores pylama specific isort config overrides.
   - Fixed #1781: `--from-first` CLI flag shouldn't take any arguments.
+  - Fixed #1792: Sorting literals sometimes ignored when placed on first few lines of file.
 
 ### 5.9.2 July 8th 2021
   - Improved behavior of `isort --check --atomic` against Cython files.
diff --git a/isort/core.py b/isort/core.py
index 4b24e45c..4d0a46eb 100644
--- a/isort/core.py
+++ b/isort/core.py
@@ -176,10 +176,13 @@ def process(
                 (index == 0 or (index in (1, 2) and not contains_imports))
                 and stripped_line.startswith("#")
                 and stripped_line not in config.section_comments
+                and stripped_line not in CODE_SORT_COMMENTS
             ):
                 in_top_comment = True
             elif in_top_comment and (
-                not line.startswith("#") or stripped_line in config.section_comments
+                not line.startswith("#")
+                or stripped_line in config.section_comments
+                or stripped_line in CODE_SORT_COMMENTS
             ):
                 in_top_comment = False
                 first_comment_index_end = index - 1
diff --git a/tests/unit/test_regressions.py b/tests/unit/test_regressions.py
index 449f83d5..1853893e 100644
--- a/tests/unit/test_regressions.py
+++ b/tests/unit/test_regressions.py
@@ -1828,3 +1828,44 @@ v = """
 v=""""""
 '''
     )
+
+
+def test_literal_sort_at_top_of_file_issue_1792():
+    assert (
+        isort.code(
+            '''"""I'm a docstring! Look at me!"""
+
+# isort: unique-list
+__all__ = ["Foo", "Foo", "Bar"]
+
+from typing import final  # arbitrary
+
+
+@final
+class Foo:
+    ...
+
+
+@final
+class Bar:
+    ...
+'''
+        )
+        == '''"""I'm a docstring! Look at me!"""
+
+# isort: unique-list
+__all__ = ['Bar', 'Foo']
+
+from typing import final  # arbitrary
+
+
+@final
+class Foo:
+    ...
+
+
+@final
+class Bar:
+    ...
+'''
+    )