From 5c5c496b605886b286d1b99e0f9e28ec02117ad5 Mon Sep 17 00:00:00 2001
From: Yuqian Yang <crupest@crupest.life>
Date: Fri, 17 Oct 2025 14:06:48 +0800
Subject: Use std::from_chars.

---
 test/base/StringUtilTest.cpp | 112 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)

(limited to 'test/base/StringUtilTest.cpp')

diff --git a/test/base/StringUtilTest.cpp b/test/base/StringUtilTest.cpp
index 3ce4cff1..5951531d 100644
--- a/test/base/StringUtilTest.cpp
+++ b/test/base/StringUtilTest.cpp
@@ -101,6 +101,118 @@ TEST_CASE("StringUtil Utf16CodePointIterator", "[string]") {
   REQUIRE(code_points == expected_code_points);
 }
 
+TEST_CASE("ParseToNumber Work", "[string]") {
+  using namespace cru::string;
+
+  auto r1 = ParseToNumber<int>("123");
+  REQUIRE(r1.valid);
+  REQUIRE(r1.value == 123);
+  REQUIRE(r1.processed_char_count == 3);
+
+  auto r2 = ParseToNumber<int>("123.123");
+  REQUIRE(!r2.valid);
+
+  auto r3 = ParseToNumber<float>("123.123");
+  REQUIRE(r3.valid);
+  REQUIRE(r3.value == 123.123f);
+  REQUIRE(r3.processed_char_count == 7);
+
+  auto r4 = ParseToNumber<float>("a123");
+  REQUIRE(!r4.valid);
+}
+
+TEST_CASE("ParseToNumber AllowLeadingZeroFlag", "[string]") {
+  using namespace cru::string;
+
+  auto r1 = ParseToNumber<int>("  123");
+  REQUIRE(!r1.valid);
+
+  auto r2 = ParseToNumber<int>("  123", ParseToNumberFlags::AllowLeadingSpaces);
+  REQUIRE(r2.valid);
+  REQUIRE(r2.value == 123);
+  REQUIRE(r2.processed_char_count == 5);
+
+  auto r3 = ParseToNumber<float>("  123.123");
+  REQUIRE(!r3.valid);
+
+  auto r4 =
+      ParseToNumber<float>("  123.123", ParseToNumberFlags::AllowLeadingSpaces);
+  REQUIRE(r4.valid);
+  REQUIRE(r4.value == 123.123f);
+  REQUIRE(r4.processed_char_count == 9);
+}
+
+TEST_CASE("StringToIntegerConverterImpl AllowTrailingSpacesFlag", "[string]") {
+  using namespace cru::string;
+
+  auto r1 = ParseToNumber<int>("123  ");
+  REQUIRE(!r1.valid);
+
+  auto r2 =
+      ParseToNumber<int>("123  ", ParseToNumberFlags::AllowTrailingSpaces);
+  REQUIRE(r2.valid);
+  REQUIRE(r2.value == 123);
+  REQUIRE(r2.processed_char_count == 3);
+
+  auto r3 = ParseToNumber<float>("123.123  ");
+  REQUIRE(!r3.valid);
+
+  auto r4 = ParseToNumber<float>("123.123  ",
+                                 ParseToNumberFlags::AllowTrailingSpaces);
+  REQUIRE(r4.valid);
+  REQUIRE(r4.value == 123.123f);
+  REQUIRE(r4.processed_char_count == 7);
+}
+
+TEST_CASE("StringToIntegerConverterImpl AllowTrailingJunk", "[string]") {
+  using namespace cru::string;
+
+  auto r1 = ParseToNumber<int>("123ab");
+  REQUIRE(!r1.valid);
+
+  auto r2 = ParseToNumber<int>("123ab", ParseToNumberFlags::AllowTrailingJunk);
+  REQUIRE(r2.valid);
+  REQUIRE(r2.value == 123);
+  REQUIRE(r2.processed_char_count == 3);
+
+  auto r3 = ParseToNumber<float>("123.123ab");
+  REQUIRE(!r3.valid);
+
+  auto r4 =
+      ParseToNumber<float>("123.123ab", ParseToNumberFlags::AllowTrailingJunk);
+  REQUIRE(r4.valid);
+  REQUIRE(r4.value == 123.123f);
+  REQUIRE(r4.processed_char_count == 7);
+}
+
+TEST_CASE("StringToIntegerConverterImpl CompositeFlags", "[string]") {
+  using namespace cru::string;
+
+  auto r1 =
+      ParseToNumber<int>("  123ab", ParseToNumberFlags::AllowLeadingSpaces |
+                                        ParseToNumberFlags::AllowTrailingJunk);
+  REQUIRE(r1.valid);
+  REQUIRE(r1.value == 123);
+  REQUIRE(r1.processed_char_count == 5);
+
+  auto r2 = ParseToNumber<float>("  123.123ab",
+                                 ParseToNumberFlags::AllowLeadingSpaces |
+                                     ParseToNumberFlags::AllowTrailingJunk);
+  REQUIRE(r2.valid);
+  REQUIRE(r2.value == 123.123f);
+  REQUIRE(r2.processed_char_count == 9);
+}
+
+TEST_CASE("String ParseToNumberList", "[string]") {
+  using namespace cru::string;
+
+  auto r1 = ParseToNumberList<int>("123 456 789");
+  REQUIRE(r1 == std::vector<int>{123, 456, 789});
+
+  auto r2 = ParseToNumberList<float>("1.1 2.2 3.3");
+  REQUIRE(r2 == std::vector<float>{1.1f, 2.2f, 3.3f});
+}
+
 // TEST(WinString, IndexUtf8ToUtf16) {
 //   using cru::platform::win::IndexUtf8ToUtf16;
 //   std::string_view utf8_string = "aπ你🤣!";
-- 
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