Test for sort imports

Sorting imports has been an unwritten coding style of our codebase. This
commit makes it into a test rule.

Signed-off-by: Hritik Vijay <hritikxx8@gmail.com>

Author: Hritik14

pyproject.toml

@@ -43,4 +43,10 @@ addopts = [
     "-rfExXw",
     "--strict",
     "--doctest-modules"
-]
+]
+
+[tool.isort]
+profile = "black"
+line_length = 100
+atomic = true
+multi_line_output = 3

vulnerabilities/tests/test_basics.py

@@ -20,11 +20,10 @@
 #  VulnerableCode is a free software code scanning tool from nexB Inc. and others.
 #  Visit https://github.com/nexB/vulnerablecode/ for support and download.
 
-from os.path import dirname
-from os.path import join
 import subprocess
 import sys
 import unittest
+from os.path import dirname, join
 
 root_dir = dirname(dirname(dirname(__file__)))
 bin_dir = dirname(sys.executable)
@@ -37,3 +36,9 @@ def test_codestyle(self):
             subprocess.check_output(args.split(), cwd=root_dir)
         except Exception as e:
             raise Exception(f"Black style check failed, please format the code using black") from e
+
+        args = join(bin_dir, "isort -c .")
+        try:
+            subprocess.check_output(args.split(), cwd=root_dir)
+        except Exception as e:
+            raise Exception("Unsorted imports, please sort your imports using isort") from e