1 files changed, 90 insertions, 0 deletions
diff --git a/tests/basics/string_format_error.py b/tests/basics/string_format_error.py
new file mode 100644
index 000000000..708348d59
--- /dev/null
+++ b/tests/basics/string_format_error.py
@@ -0,0 +1,90 @@
+# tests for errors in {} format string
+
+try:
+    '{0:0}'.format('zzz')
+except (ValueError):
+    print('ValueError')
+
+try:
+    '{1:}'.format(1)
+except IndexError:
+    print('IndexError')
+
+try:
+    '}'.format('zzzz')
+except ValueError:
+    print('ValueError')
+
+# end of format parsing conversion specifier
+try:
+    '{!'.format('a')
+except ValueError:
+    print('ValueError')
+
+# unknown conversion specifier
+try:
+    'abc{!d}'.format('1')
+except ValueError:
+    print('ValueError')
+
+try:
+    '{abc'.format('zzzz')
+except ValueError:
+    print('ValueError')
+
+# expected ':' after specifier
+try:
+    '{!s :}'.format(2)
+except ValueError:
+    print('ValueError')
+
+try:
+    '{}{0}'.format(1, 2)
+except ValueError:
+    print('ValueError')
+
+try:
+    '{1:}'.format(1)
+except IndexError:
+    print('IndexError')
+
+try:
+    '{ 0 :*^10}'.format(12)
+except KeyError:
+    print('KeyError')
+
+try:
+    '{0}{}'.format(1)
+except ValueError:
+    print('ValueError')
+
+try:
+    '{}{}'.format(1)
+except IndexError:
+    print('IndexError')
+
+try:
+    '{0:+s}'.format('1')
+except ValueError:
+    print('ValueError')
+
+try:
+    '{0:+c}'.format(1)
+except ValueError:
+    print('ValueError')
+
+try:
+    '{0:s}'.format(1)
+except ValueError:
+    print('ValueError')
+
+try:
+    '{:*"1"}'.format('zz')
+except ValueError:
+    print('ValueError')
+
+# unknown format code for str arg
+try:
+    '{:X}'.format('zz')
+except ValueError:
+    print('ValueError')