Add base for menu parsing unit tests

test/ParserTestUtils/Parsing/Mock/MockSequence.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "Parsing/Sequence/AbstractSequence.h"
+
+struct MockSequenceState
+{
+    char m_dummy;
+};
+
+template<typename TokenType>
+class MockSequence final : public AbstractSequence<TokenType, MockSequenceState>
+{
+public:
+    typedef AbstractSequence<TokenType, MockSequenceState> parent_t;
+
+private:
+    using parent_t::AddMatchers;
+    using parent_t::AddLabeledMatchers;
+
+    std::function<void(SequenceResult<TokenType>&)> m_handler;
+
+protected:
+    void ProcessMatch(MockSequenceState* state, SequenceResult<TokenType>& result) const override
+    {
+        if (m_handler)
+            m_handler(result);
+    }
+
+public:
+    void AddMockMatchers(std::initializer_list<Movable<std::unique_ptr<typename parent_t::matcher_t>>> matchers)
+    {
+        AddMatchers(matchers);
+    }
+
+    void AddMockLabeledMatchers(std::initializer_list<Movable<std::unique_ptr<typename parent_t::matcher_t>>> matchers, const int label)
+    {
+        AddLabeledMatchers(matchers, label);
+    }
+
+    void Handle(std::function<void(SequenceResult<TokenType>&)> handler)
+    {
+        m_handler = std::move(handler);
+    }
+
+    IMatcherForLabelSupplier<TokenType>* GetLabelSupplier()
+    {
+        return this;
+    }
+};