Add more test cases for E402; issue #304

Author: IanLee1521

testsuite/E40.py

@@ -11,3 +11,28 @@
 
 import myclass
 import foo.bar.yourclass
+#: E402
+__all__ = ['abc']
+
+import foo
+#: Okay
+try:
+    import foo
+except:
+    pass
+else:
+    print('imported foo')
+finally:
+    print('made attempt to import foo')
+
+import bar
+#: E402
+VERSION = '1.2.3'
+
+import foo
+#: E402
+import foo
+
+a = 1
+
+import bar