doctest 2.3.8 (new formula)

Closes #56464.

Signed-off-by: chenrui <chenrui333@gmail.com>

Formula/doctest.rb

@@ -0,0 +1,34 @@
+class Doctest < Formula
+  desc "The fastest feature-rich C++11/14/17/20 single-header testing framework"
+  homepage "https://github.com/onqtam/doctest"
+  url "https://github.com/onqtam/doctest/archive/2.3.8.tar.gz"
+  sha256 "d7232437eceb46ad5de03cacdee770c80f2e53e7b8efc1c8a8ed29539f64efa5"
+
+  depends_on "cmake" => :build
+
+  def install
+    mkdir "build" do
+      system "cmake", "..", *std_cmake_args
+      system "cmake", "--build", ".", "--target", "install"
+    end
+  end
+
+  test do
+    (testpath/"test.cpp").write <<~EOS
+      #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+      #include <doctest/doctest.h>
+      TEST_CASE("Basic") {
+        int x = 1;
+        SUBCASE("Test section 1") {
+          x = x + 1;
+          REQUIRE(x == 2);
+        }
+        SUBCASE("Test section 2") {
+          REQUIRE(x == 1);
+        }
+      }
+    EOS
+    system ENV.cxx, "test.cpp", "-std=c++11", "-o", "test"
+    system "./test"
+  end
+end