util/TerminatedArray: new class

test/util/TestTerminatedArray.cxx

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: BSD-2-Clause
+// author: Max Kellermann <max.kellermann@gmail.com>
+
+#include "util/TerminatedArray.hxx"
+
+#include <gtest/gtest.h>
+
+TEST(TerminatedArray, PointerArray)
+{
+	const char *const raw_array[] = {"foo", "bar", nullptr};
+
+	TerminatedArray<const char *const, nullptr> array{raw_array};
+	EXPECT_STREQ(*array.begin(), "foo");
+	EXPECT_STREQ(*std::next(array.begin()), "bar");
+	EXPECT_EQ(std::prev(std::next(array.begin())), array.begin());
+	EXPECT_NE(array.begin(), array.end());
+	EXPECT_NE(std::next(array.begin()), array.end());
+	EXPECT_EQ(std::next(array.begin(), 2), array.end());
+}
+
+TEST(TerminatedArray, CSTring)
+{
+	const char raw_array[] = "abc";
+
+	TerminatedArray<const char, '\0'> array{raw_array};
+	EXPECT_EQ(*array.begin(), 'a');
+	EXPECT_EQ(*std::next(array.begin()), 'b');
+	EXPECT_EQ(*std::next(array.begin(), 2), 'c');
+	EXPECT_EQ(std::prev(std::next(array.begin())), array.begin());
+	EXPECT_NE(array.begin(), array.end());
+	EXPECT_NE(std::next(array.begin()), array.end());
+	EXPECT_NE(std::next(array.begin(), 2), array.end());
+	EXPECT_EQ(std::next(array.begin(), 3), array.end());
+}