Add base for menu parsing unit tests

test/ParserTestUtils/Parsing/Mock/MockParserLineStream.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <vector>
+#include <unordered_map>
+
+#include "Parsing/IParserLineStream.h"
+
+class MockParserLineStream final : public IParserLineStream
+{
+public:
+    static const std::string MOCK_FILENAME;
+
+private:
+    class IncludePos
+    {
+    public:
+        std::string m_filename;
+        const std::vector<std::string>& m_lines;
+        unsigned m_pos;
+
+        IncludePos(std::string filename, const std::vector<std::string>& lines);
+    };
+    
+    std::unordered_map<std::string, std::vector<std::string>> m_include_lines;
+    std::vector<IncludePos> m_include_positions;
+
+public:
+    explicit MockParserLineStream(const std::vector<std::string>& lines);
+
+    void AddIncludeLines(const std::string& filename, const std::vector<std::string>& lines);
+    ParserLine NextLine() override;
+    bool IncludeFile(const std::string& filename) override;
+    void PopCurrentFile() override;
+    _NODISCARD bool IsOpen() const override;
+    _NODISCARD bool Eof() const override;
+};