First set of attribute tests. Contains one case of a value being copi…

…ed over and one case of a value being changed from zero to false.

xml_converter/test_cases/can_fade_tests/can_fade_is_false.xml

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+<OverlayData>
+<MarkerCategory  Name="IsFalse">
+</MarkerCategory>
+
+<POIs>
+<POI  CanFade="false"/>
+</POIs>
+</OverlayData>

xml_converter/test_cases/can_fade_tests/can_fade_is_zero.xml

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+<OverlayData>
+<MarkerCategory  Name="IsZero">
+</MarkerCategory>
+
+<POIs>
+<POI  CanFade="0" Type="IsZero"/>
+</POIs>
+</OverlayData>

xml_converter/test_cases/test_output/can_fade_corrected_zero.xml

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+<OverlayData>
+<MarkerCategory  Name="IsZero">
+</MarkerCategory>
+
+<POIs>
+<POI  CanFade="false" Type="IsZero"/>
+</POIs>
+</OverlayData>

xml_converter/test_cases/test_output/can_fade_is_false.xml

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+<OverlayData>
+<MarkerCategory  Name="IsFalse">
+</MarkerCategory>
+
+<POIs>
+<POI  CanFade="false"/>
+</POIs>
+</OverlayData>

xml_converter/tests/test_bool.cpp

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+#include "../src/attribute/bool.hpp"
+#include "../src/packaging_xml.hpp"
+#include <gtest/gtest.h>
+#include <fstream>
+
+class BoolTest : public ::testing::Test {
+ protected:
+    void SetUp() override {
+    }
+    void TearDown() override {
+    }
+};
+
+bool compare_files(const std::string& file1_path, const std::string& file2_path) {
+    std::ifstream file1(file1_path);
+    std::ifstream file2(file2_path);
+
+    if (!file1.is_open() || !file2.is_open()) {
+        std::cerr << "Error: Could not open one or both of the files." << std::endl;
+        return false;
+    }
+
+    char char1, char2;
+    bool files_are_equal = true;
+
+    while (true) {
+        char1 = file1.get();
+        char2 = file2.get();
+
+        if (char1 != char2) {
+            files_are_equal = false;
+            break;
+        }
+
+        if (file1.eof() && file2.eof()) {
+            break;  // Reached the end of both files
+        }
+
+        // If one file reaches the end before the other, they are not equal
+        if (file1.eof() || file2.eof()) {
+            files_are_equal = false;
+            break;
+        }
+    }
+
+    file1.close();
+    file2.close();
+
+    return files_are_equal;
+}
+
+TEST_F(BoolTest, ValueIsFalse) {
+    std::map<std::string, Category> marker_categories;
+    std::vector<Parseable*> parsed_pois;
+    std::string xml_input = "../test_cases/can_fade_tests/can_fade_is_false.xml";
+    std::string xml_output = "../test_cases/test_output/can_fade_is_false.xml";
+    parse_xml_file(xml_input, &marker_categories, &parsed_pois);
+    write_xml_file(xml_output, &marker_categories, &parsed_pois);
+    EXPECT_TRUE(compare_files(xml_input, xml_output));
+}
+
+TEST_F(BoolTest, ValueIsZero) {
+    std::map<std::string, Category> marker_categories;
+    std::vector<Parseable*> parsed_pois;
+    std::string xml_input = "../test_cases/can_fade_tests/can_fade_is_zero.xml";
+    std::string xml_output = "../test_cases/test_output/can_fade_corrected_zero.xml";
+    parse_xml_file(xml_input, &marker_categories, &parsed_pois);
+    write_xml_file(xml_output, &marker_categories, &parsed_pois);
+    EXPECT_FALSE(compare_files(xml_input, xml_output));
+}