Initial Course

modules/12_cpp20/test/concepts_test.cpp

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+#include "concepts.hpp"
+#include <gtest/gtest.h>
+
+TEST(Concepts, DoubleValue) {
+    EXPECT_EQ(cpp20::double_value(21), 42);
+}
+
+TEST(Concepts, Clamp01) {
+    EXPECT_DOUBLE_EQ(cpp20::clamp01(1.5), 1.0);
+    EXPECT_DOUBLE_EQ(cpp20::clamp01(-0.5), 0.0);
+}
+
+TEST(Concepts, UppercaseCopy) {
+    EXPECT_EQ(cpp20::uppercase_copy(std::string{"hello"}), "HELLO");
+}
+
+TEST(Concepts, SumIntegral) {
+    EXPECT_EQ(cpp20::sum_integral({1, 2, 3}), 6);
+}

modules/12_cpp20/test/ranges_test.cpp

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+#include "ranges.hpp"
+#include <gtest/gtest.h>
+
+TEST(Ranges, EvenNumbers) {
+    EXPECT_EQ(cpp20::even_numbers({1, 2, 3, 4, 5}), (std::vector<int>{2, 4}));
+}
+
+TEST(Ranges, TakeFirstThree) {
+    EXPECT_EQ(cpp20::take_first_three({9, 8, 7, 6, 5}), (std::vector<int>{9, 8, 7}));
+}
+
+TEST(Ranges, JoinStrings) {
+    EXPECT_EQ(cpp20::join_strings({"C", "++", "20"}), "C++20");
+}

modules/12_cpp20/test/spaceship_operator_test.cpp

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+#include "spaceship_operator.hpp"
+#include <gtest/gtest.h>
+
+TEST(SpaceshipOperator, SortVersions) {
+    const auto sorted = cpp20::sort_versions({{1, 10, 0}, {1, 2, 0}, {2, 0, 0}});
+    ASSERT_EQ(sorted.size(), 3U);
+    EXPECT_EQ(sorted[0].major, 1);
+    EXPECT_EQ(sorted[0].minor, 2);
+    EXPECT_EQ(sorted[2].major, 2);
+}
+
+TEST(SpaceshipOperator, IsSorted) {
+    EXPECT_TRUE(cpp20::is_sorted_versions({{1, 0, 0}, {1, 1, 0}, {2, 0, 0}}));
+}

modules/12_cpp20/test/span_test.cpp

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+#include "span.hpp"
+#include <gtest/gtest.h>
+
+TEST(Span, SpanSum) {
+    const int data[] = {1, 2, 3, 4};
+    EXPECT_EQ(cpp20::span_sum(data), 10);
+}
+
+TEST(Span, FirstAndLast) {
+    const std::vector<int> data = {10, 20, 30};
+    const auto [first, last] = cpp20::first_and_last(std::span<const int>{data});
+    EXPECT_EQ(first, 10);
+    EXPECT_EQ(last, 30);
+}
+
+TEST(Span, MakeSubspan) {
+    const std::vector<int> data = {1, 2, 3, 4, 5};
+    EXPECT_EQ(cpp20::make_subspan(data, 1, 3), (std::vector<int>{2, 3, 4}));
+}