[llvm] 8ca7d2a - [unittest, ADT] Add unit tests for itostr & utostr

[Thomas Preud'homme via llvm-commits]

Author: Thomas Preud'homme
Date: 2020-06-23T14:48:37+01:00
New Revision: 8ca7d2a1ee96d6b17ef743f3578618f4fd9781e9

URL: https://github.com/llvm/llvm-project/commit/8ca7d2a1ee96d6b17ef743f3578618f4fd9781e9
DIFF: https://github.com/llvm/llvm-project/commit/8ca7d2a1ee96d6b17ef743f3578618f4fd9781e9.diff

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

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D82300

Added: 
    

Modified: 
    llvm/unittests/ADT/StringExtrasTest.cpp

Removed: 
    


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diff  --git a/llvm/unittests/ADT/StringExtrasTest.cpp b/llvm/unittests/ADT/StringExtrasTest.cpp
index 67d573d64975..d17a172dbd9c 100644
--- a/llvm/unittests/ADT/StringExtrasTest.cpp
+++ b/llvm/unittests/ADT/StringExtrasTest.cpp
@@ -182,3 +182,32 @@ TEST(StringExtras, ConvertToCamelFromSnakeCase) {
   testConvertToCamelCase(true, "Op_Name", "Op_Name");
   testConvertToCamelCase(true, "opName", "OpName");
 }
+
+constexpr uint64_t MaxUint64 = std::numeric_limits<uint64_t>::max();
+constexpr int64_t MaxInt64 = std::numeric_limits<int64_t>::max();
+constexpr int64_t MinInt64 = std::numeric_limits<int64_t>::min();
+
+TEST(StringExtras, UToStr) {
+  EXPECT_EQ("0", utostr(0));
+  EXPECT_EQ("0", utostr(0, /*isNeg=*/false));
+  EXPECT_EQ("1", utostr(1));
+  EXPECT_EQ("1", utostr(1, /*isNeg=*/false));
+  EXPECT_EQ(std::to_string(MaxUint64), utostr(MaxUint64));
+  EXPECT_EQ(std::to_string(MaxUint64), utostr(MaxUint64, /*isNeg=*/false));
+
+  EXPECT_EQ("-0", utostr(0, /*isNeg=*/true));
+  EXPECT_EQ("-1", utostr(1, /*isNeg=*/true));
+  EXPECT_EQ("-" + std::to_string(MaxInt64), utostr(MaxInt64, /*isNeg=*/true));
+  constexpr uint64_t MinusMinInt64 = -static_cast<uint64_t>(MinInt64);
+  EXPECT_EQ("-" + std::to_string(MinusMinInt64),
+            utostr(MinusMinInt64, /*isNeg=*/true));
+  EXPECT_EQ("-" + std::to_string(MaxUint64), utostr(MaxUint64, /*isNeg=*/true));
+}
+
+TEST(StringExtras, IToStr) {
+  EXPECT_EQ("0", itostr(0));
+  EXPECT_EQ("1", itostr(1));
+  EXPECT_EQ("-1", itostr(-1));
+  EXPECT_EQ(std::to_string(MinInt64), itostr(MinInt64));
+  EXPECT_EQ(std::to_string(MaxInt64), itostr(MaxInt64));
+}