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-rw-r--r--Lib/test/test_fstring.py18
1 files changed, 18 insertions, 0 deletions
diff --git a/Lib/test/test_fstring.py b/Lib/test/test_fstring.py
index 3484fce..c9e6e7d 100644
--- a/Lib/test/test_fstring.py
+++ b/Lib/test/test_fstring.py
@@ -1150,6 +1150,24 @@ non-important content
self.assertRaises(SyntaxError, eval, "f'{C=]'")
+ # Make sure leading and following text works.
+ x = 'foo'
+ self.assertEqual(f'X{x=}Y', 'Xx='+repr(x)+'Y')
+
+ # Make sure whitespace around the = works.
+ self.assertEqual(f'X{x =}Y', 'Xx ='+repr(x)+'Y')
+ self.assertEqual(f'X{x= }Y', 'Xx= '+repr(x)+'Y')
+ self.assertEqual(f'X{x = }Y', 'Xx = '+repr(x)+'Y')
+
+ # These next lines contains tabs. Backslash escapes don't
+ # work in f-strings.
+ # patchcheck doens't like these tabs. So the only way to test
+ # this will be to dynamically created and exec the f-strings. But
+ # that's such a hassle I'll save it for another day. For now, convert
+ # the tabs to spaces just to shut up patchcheck.
+ #self.assertEqual(f'X{x =}Y', 'Xx\t='+repr(x)+'Y')
+ #self.assertEqual(f'X{x = }Y', 'Xx\t=\t'+repr(x)+'Y')
+
def test_walrus(self):
x = 20
# This isn't an assignment expression, it's 'x', with a format