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tests/cpydiff: Clarify f-string diffs regarding concatenation. 

Concatenation of any literals (including f-strings) should be avoided.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
This commit is contained in:
Jim Mussared 2021-11-18 23:29:48 +11:00 committed by Damien George
parent 11ed94797d
commit e99f7b6d25
1 changed files with 8 additions and 7 deletions
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15
tests/cpydiff/core_fstring_concat.py
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@ -1,12 +1,13 @@
"""
categories: Core
description: f-strings don't support concatenation with adjacent literals if the adjacent literals contain braces
description: f-strings don't support concatenation with adjacent literals if the adjacent literals contain braces or are f-strings
cause: MicroPython is optimised for code space.
workaround: Use the + operator between literal strings when either is an f-string
workaround: Use the + operator between literal strings when either or both are f-strings
"""
x = 1
print("aa" f"{x}")
print(f"{x}" "ab")
print("a{}a" f"{x}")
print(f"{x}" "a{}b")
x, y = 1, 2
print("aa" f"{x}") # works
print(f"{x}" "ab") # works
print("a{}a" f"{x}") # fails
print(f"{x}" "a{}b") # fails
print(f"{x}" f"{y}") # fails