Add test cases for xutils, xmagics_manager, xpreamble_manager and xbuffer

include/xeus-cpp/xholder.hpp

@@ -16,12 +16,13 @@
 #include <nlohmann/json.hpp>
 
 #include "xpreamble.hpp"
+#include "xeus_cpp_config.hpp"
 
 namespace nl = nlohmann;
 
 namespace xcpp
 {
-    class xholder_preamble
+    class XEUS_CPP_API xholder_preamble
     {
     public:
 

test/test_interpreter.cpp

@@ -8,24 +8,25 @@
 
 #include "doctest/doctest.h"
 #include "xeus-cpp/xinterpreter.hpp"
+#include "xeus-cpp/xholder.hpp"
+#include "xeus-cpp/xmanager.hpp"
 #include "xeus-cpp/xutils.hpp"
 
 TEST_SUITE("execute_request")
 {
     TEST_CASE("fetch_documentation")
     {
-
         xcpp::interpreter interpreter(0, nullptr);
 
         std::string code = "?std::vector";
         std::string inspect_result = "https://en.cppreference.com/w/cpp/container/vector";
         nl::json user_expressions = nl::json::object();
 
         nl::json result = interpreter.execute_request(
-            code,
-            false,
-            false,
-            user_expressions,
+            code, 
+            false, 
+            false, 
+            user_expressions, 
             false
         );
 
@@ -48,3 +49,232 @@ TEST_SUITE("extract_filename")
         REQUIRE(argc == 2);
     }
 }
+
+TEST_SUITE("should_print_version")
+{
+    // This test case checks if the function `should_print_version` correctly identifies
+    // when the "--version" argument is passed. It sets up a scenario where "--version"
+    // is one of the command line arguments and checks if the function returns true.
+    TEST_CASE("should_print_version_with_version_arg")
+    {
+        char arg1[] = "program_name";
+        char arg2[] = "--version";
+        char* argv[] = {arg1, arg2};
+        int argc = 2;
+
+        bool result = xcpp::should_print_version(argc, argv);
+
+        REQUIRE(result == true);
+    }
+
+    // This test case checks if the function `should_print_version` correctly identifies
+    // when the "--version" argument is not passed. It sets up a scenario where "--version"
+    // is not one of the command line arguments and checks if the function returns false.
+    TEST_CASE("should_print_version_without_version_arg")
+    {
+        char arg1[] = "program_name";
+        char arg2[] = "-f";
+        char arg3[] = "filename";
+        char* argv[] = {arg1, arg2, arg3};
+        int argc = 3;
+
+        bool result = xcpp::should_print_version(argc, argv);
+
+        REQUIRE(result == false);
+    }
+}
+
+TEST_SUITE("build_interpreter")
+{
+    // This test case checks if the function `build_interpreter` returns a non-null pointer
+    // when valid arguments are passed. It sets up a scenario with valid command line arguments
+    // and checks if the function returns a non-null pointer.
+    TEST_CASE("build_interpreter_pointer_not_null")
+    {
+        char arg1[] = "program_name";
+        char arg2[] = "-option1";
+        char* argv[] = {arg1, arg2};
+        int argc = 2;
+
+        interpreter_ptr interp_ptr = xcpp::build_interpreter(argc, argv);
+
+        REQUIRE(interp_ptr != nullptr);
+    }
+}
+
+TEST_SUITE("is_match_magics_manager")
+{
+    // This test case checks if the function `is_match` correctly identifies strings that match
+    // the regex pattern used in `xmagics_manager`. It sets up a scenario where strings that should
+    // match the pattern are passed and checks if the function returns true.
+    TEST_CASE("is_match_true")
+    {
+        xcpp::xmagics_manager manager;
+
+        bool result1 = manager.is_match("%%magic");
+        bool result2 = manager.is_match("%magic");
+
+        REQUIRE(result1 == true);
+        REQUIRE(result2 == true);
+    }
+
+    // This test case checks if the function `is_match` correctly identifies strings that do not match
+    // the regex pattern used in `xmagics_manager`. It sets up a scenario where strings that should not
+    // match the pattern are passed and checks if the function returns false.
+    TEST_CASE("is_match_false")
+    {
+        xcpp::xmagics_manager manager;
+
+        bool result1 = manager.is_match("not a magic");
+        bool result2 = manager.is_match("%%");
+        bool result3 = manager.is_match("%");
+
+        REQUIRE(result1 == false);
+        REQUIRE(result2 == false);
+        REQUIRE(result3 == false);
+    }
+}
+
+TEST_SUITE("clone_magics_manager")
+{
+    // This test case checks if the function `clone_magics_manager` returns a non-null pointer
+    // when called. It doesn't require any specific setup as it's testing the default behavior
+    // of the function, and checks if the function returns a non-null pointer.
+    TEST_CASE("clone_magics_manager_not_null")
+    {
+        xcpp::xmagics_manager manager;
+
+        xcpp::xpreamble* clone = manager.clone();
+
+        REQUIRE(clone != nullptr);
+    }
+
+    // This test case checks if the function `clone_magics_manager` returns a cloned object
+    // of the same type as the original. It calls the function and checks if the type of the
+    // returned object matches the type of the original `magics_manager`.
+    TEST_CASE("clone_magics_manager_same_type")
+    {
+        xcpp::xmagics_manager manager;
+
+        xcpp::xpreamble* clone = manager.clone();
+
+        REQUIRE(dynamic_cast<xcpp::xmagics_manager*>(clone) != nullptr);
+
+        delete clone;
+    }
+}
+
+TEST_SUITE("xpreamble_manager_operator")
+{
+    // This test case checks if the `xpreamble_manager` correctly registers and accesses
+    // a `xpreamble` object. It sets up a scenario where a `xpreamble` object is registered
+    // with a name and checks if the object can be accessed using the same name.
+    TEST_CASE("register_and_access")
+    {
+        std::string name = "test";
+        xcpp::xpreamble_manager manager;
+        xcpp::xmagics_manager* magics = new xcpp::xmagics_manager();
+        manager.register_preamble(name, magics);
+
+        xcpp::xholder_preamble& result = manager.operator[](name);
+
+        REQUIRE(&(result.get_cast<xcpp::xmagics_manager>()) == magics);
+    }
+}
+
+TEST_SUITE("xbuffer")
+{
+    // This test case checks if the `xoutput_buffer` correctly calls the callback function
+    // when the buffer is flushed. It sets up a scenario where a `xoutput_buffer` object is
+    // created with a callback function, and checks if the callback function is called when
+    // the buffer is flushed.
+    TEST_CASE("xoutput_buffer_calls_callback_on_sync")
+    {
+        std::string callback_output;
+        auto callback = [&callback_output](const std::string& value)
+        {
+            callback_output = value;
+        };
+        xcpp::xoutput_buffer buffer(callback);
+        std::ostream stream(&buffer);
+
+        stream << "Hello, world!";
+        stream.flush();
+
+        REQUIRE(callback_output == "Hello, world!");
+    }
+
+    // This test case checks if the `xinput_buffer` correctly calls the callback function
+    // when the buffer is flushed. It sets up a scenario where a `xinput_buffer` object is
+    // created with a callback function, and checks if the callback function is called when
+    // the buffer is flushed.
+    TEST_CASE("xinput_buffer_calls_callback_on_underflow")
+    {
+        std::string callback_input;
+        auto callback = [&callback_input](std::string& value)
+        {
+            value = callback_input;
+        };
+        xcpp::xinput_buffer buffer(callback);
+        std::istream stream(&buffer);
+
+        callback_input = "Hello, world!";
+        std::string output;
+        std::getline(stream, output);
+
+        REQUIRE(output == "Hello, world!");
+    }
+
+    // This test case checks if the `xoutput_buffer` correctly handles an empty output.
+    // It sets up a scenario where the `xoutput_buffer` is given an empty output, then checks
+    // if the buffer correctly identifies and handles this situation without errors or exceptions.
+    TEST_CASE("xoutput_buffer_handles_empty_output")
+    {
+        std::string callback_output;
+        auto callback = [&callback_output](const std::string& value)
+        {
+            callback_output = value;
+        };
+
+        xcpp::xoutput_buffer buffer(callback);
+        std::ostream stream(&buffer);
+
+        stream << "";
+        stream.flush();
+
+        REQUIRE(callback_output == "");
+    }
+
+    // This test case checks if the `xinput_buffer` correctly handles an empty input.
+    // It sets up a scenario where the `xinput_buffer` is given an empty input, then checks
+    // if the buffer correctly identifies and handles this situation without errors or exceptions.
+    TEST_CASE("xinput_buffer_handles_empty_input")
+    {
+        std::string callback_input = "";
+        auto callback = [&callback_input](std::string& value)
+        {
+            value = callback_input;
+        };
+
+        xcpp::xinput_buffer buffer(callback);
+        std::istream stream(&buffer);
+
+        std::string output;
+        std::getline(stream, output);
+
+        REQUIRE(output == "");
+    }
+
+    // This test case checks if the `xnull` correctly discards the output.
+    // It sets up a scenario where the `xnull` is given some output, then checks
+    // if the output is correctly discarded and not stored or returned.
+    TEST_CASE("xnull_discards_output")
+    {
+        xcpp::xnull null_buf;
+        std::ostream null_stream(&null_buf);
+
+        null_stream << "Hello, world!";
+
+        REQUIRE(null_stream.good() == true);
+    }
+}