From 64ba8e99ec1cc82f99fb9ad8ab1da10b25fe6eb1 Mon Sep 17 00:00:00 2001
From: Timothy Crosley <timothy.crosley@gmail.com>
Date: Thu, 16 Apr 2020 22:51:08 -0700
Subject: Initial show_diff coverage

---
 isort/api.py      | 2 +-
 tests/test_api.py | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/isort/api.py b/isort/api.py
index 4648d77a..8e3e2018 100644
--- a/isort/api.py
+++ b/isort/api.py
@@ -486,7 +486,6 @@ def sort_file(
                             disregard_skip=disregard_skip,
                             **config_kwargs,
                         )
-                    source_file.stream.close()
                     if changed:
                         if show_diff or ask_to_apply:
                             source_file.stream.seek(0)
@@ -499,6 +498,7 @@ def sort_file(
                                 str(source_file.path)
                             ):
                                 return
+                        source_file.stream.close()
                         tmp_file.replace(source_file.path)
                         if not config.quiet:
                             print(f"Fixing {source_file.path}")
diff --git a/tests/test_api.py b/tests/test_api.py
index 44db6e62..bc0a4ffa 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -15,6 +15,7 @@ def test_sort_file(tmpdir) -> None:
     imperfect = tmpdir.join(f"test_needs_changes.py")
     imperfect.write_text("import b\nimport a\n", "utf8")
     api.sort_file(imperfect, write_to_stdout=True, show_diff=True)
+    api.sort_file(imperfect, show_diff=True)
 
 
 def test_check_file(tmpdir) -> None:
-- 
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