[PATCH] D82300: [unittest, ADT] Add unit tests for itostr & utostr

[Thomas Preud'homme via Phabricator via llvm-commits]

thopre marked an inline comment as done.
thopre added inline comments.


================
Comment at: llvm/unittests/ADT/StringExtrasTest.cpp:195-196
+  EXPECT_EQ("1", utostr(1, /*isNeg=*/false));
+  EXPECT_EQ("18446744073709551615", utostr(MaxUint64));
+  EXPECT_EQ("18446744073709551615", utostr(MaxUint64, /*isNeg=*/false));
+
----------------
jhenderson wrote:
> Here, and in the below cases using the max/min values, I wonder whether it would be more robust to write something like:
> 
> ```
>   EXPECT_EQ(std::to_string(MaxUint64), utostr(MaxUint64));
>   EXPECT_EQ("-" + std::to_string(MaxUint64), utostr(MaxUint64, /*isNeg=*/true);
> ```
>  etc.
> 
> I'd expect them to produce identical output, but it also is easier to confirm the expected number. It also removes any concerns about numeric representation (2's complement etc).
It's what I did originally but I was not sure if it was fine to rely on std::to_string being correct.


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https://reviews.llvm.org/D82300