Add JSON roundtrip tests for Positional and Short wrappers

Author: Centimo

tests/json/test_positional_and_short.cpp

@@ -0,0 +1,65 @@
+#include <gtest/gtest.h>
+#include <rfl.hpp>
+#include <rfl/json.hpp>
+#include <string>
+#include <vector>
+
+#include "write_and_read.hpp"
+
+namespace test_positional_and_short_json {
+
+struct PositionalConfig {
+  rfl::Positional<std::string> input_file;
+  rfl::Positional<int> count;
+};
+
+TEST(json, test_positional_write_and_read) {
+  write_and_read(
+      PositionalConfig{"data.csv", 42},
+      R"({"input_file":"data.csv","count":42})");
+}
+
+struct ShortConfig {
+  rfl::Short<"p", int> port;
+  rfl::Short<"v", bool> verbose;
+  std::string host;
+};
+
+TEST(json, test_short_write_and_read) {
+  write_and_read(
+      ShortConfig{8080, true, "localhost"},
+      R"({"port":8080,"verbose":true,"host":"localhost"})");
+}
+
+struct CombinedConfig {
+  rfl::Positional<std::string> input_file;
+  rfl::Short<"o", std::string> output_dir;
+  rfl::Short<"v", bool> verbose;
+  int count;
+  std::vector<std::string> tags;
+};
+
+TEST(json, test_positional_and_short_combined_write_and_read) {
+  write_and_read(
+      CombinedConfig{"data.csv", "/tmp/out", true, 10, {"dev", "prod"}},
+      R"({"input_file":"data.csv","output_dir":"/tmp/out","verbose":true,"count":10,"tags":["dev","prod"]})");
+}
+
+TEST(json, test_positional_read_from_json) {
+  const auto result = rfl::json::read<PositionalConfig>(
+      R"({"input_file":"test.txt","count":7})");
+  ASSERT_TRUE(result) << result.error().what();
+  EXPECT_EQ(result.value().input_file(), "test.txt");
+  EXPECT_EQ(result.value().count(), 7);
+}
+
+TEST(json, test_short_read_from_json) {
+  const auto result = rfl::json::read<ShortConfig>(
+      R"({"port":3000,"verbose":false,"host":"example.com"})");
+  ASSERT_TRUE(result) << result.error().what();
+  EXPECT_EQ(result.value().port(), 3000);
+  EXPECT_FALSE(result.value().verbose());
+  EXPECT_EQ(result.value().host, "example.com");
+}
+
+}  // namespace test_positional_and_short_json