From 8a36eb498e1a1c2cf2e886356faa4ce67e52e874 Mon Sep 17 00:00:00 2001
From: Lexi Winter <lexi@le-fay.org>
Date: Sat, 21 Jun 2025 12:20:34 +0100
Subject: initial commit

---
 tests/getenv.cc | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 tests/getenv.cc

(limited to 'tests/getenv.cc')

diff --git a/tests/getenv.cc b/tests/getenv.cc
new file mode 100644
index 0000000..adfa84f
--- /dev/null
+++ b/tests/getenv.cc
@@ -0,0 +1,48 @@
+/*
+ * This source code is released into the public domain.
+ */
+
+#include <ranges>
+#include <string>
+
+#include <unistd.h>
+
+#include <catch2/catch_test_macros.hpp>
+
+import nihil;
+
+TEST_CASE("getenv: existing value", "[getenv]")
+{
+	auto constexpr *name = "LFJAIL_TEST_VAR";
+	auto constexpr *value = "test is a test";
+
+	REQUIRE(::setenv(name, value, 1) == 0);
+
+	auto const s = nihil::getenv(name);
+	REQUIRE(s);
+	REQUIRE(*s == value);
+}
+
+TEST_CASE("getenv: non-existing value", "[getenv]")
+{
+	auto constexpr *name = "LFJAIL_TEST_VAR";
+
+	REQUIRE(::unsetenv(name) == 0);
+
+	auto const s = nihil::getenv(name);
+	REQUIRE(!s);
+	REQUIRE(s.error() == std::errc::no_such_file_or_directory);
+}
+
+// Force the call to getenv_r() to reallocate.
+TEST_CASE("getenv: long value")
+{
+	auto constexpr *name = "LFJAIL_TEST_VAR";
+	auto const value = std::string(4096, 'a');
+
+	REQUIRE(::setenv(name, value.c_str(), 1) == 0);
+
+	auto const s = nihil::getenv(name);
+	REQUIRE(s);
+	REQUIRE(*s == value);
+}
-- 
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