Add base for simple expression unit tests

test/ParserTests/Parsing/Simple/SimpleExpressionTests.cpp

@@ -0,0 +1,100 @@
+#include <catch2/catch.hpp>
+
+#include "Parsing/Impl/AbstractParser.h"
+#include "Utils/ClassUtils.h"
+#include "Parsing/Mock/MockLexer.h"
+#include "Parsing/Simple/SimpleParserValue.h"
+#include "Parsing/Simple/Expression/ISimpleExpression.h"
+#include "Parsing/Simple/Expression/SimpleExpressionMatchers.h"
+#include "Parsing/Simple/Matcher/SimpleMatcherFactory.h"
+
+namespace test::parsing::simple::expression
+{
+    class SimpleExpressionTestState
+    {
+    public:
+        std::unique_ptr<ISimpleExpression> m_expression;
+    };
+
+    class SimpleExpressionSequence final : public AbstractSequence<SimpleParserValue, SimpleExpressionTestState>
+    {
+        const SimpleExpressionMatchers m_expression_matchers;
+
+    public:
+        SimpleExpressionSequence()
+            : m_expression_matchers(true, true, true, true)
+        {
+            const SimpleMatcherFactory create(this);
+
+            AddLabeledMatchers(m_expression_matchers.Expression(this), SimpleExpressionMatchers::LABEL_EXPRESSION);
+            AddMatchers(create.Label(SimpleExpressionMatchers::LABEL_EXPRESSION));
+        }
+
+    protected:
+        void ProcessMatch(SimpleExpressionTestState* state, SequenceResult<SimpleParserValue>& result) const override
+        {
+            state->m_expression = m_expression_matchers.ProcessExpression(result);
+        }
+    };
+
+    class SimpleExpressionTestsHelper
+    {
+    public:
+        std::unique_ptr<SimpleExpressionTestState> m_state;
+        std::unique_ptr<ILexer<SimpleParserValue>> m_lexer;
+
+        std::unique_ptr<SimpleExpressionSequence> m_sequence;
+
+        unsigned m_consumed_token_count;
+
+        explicit SimpleExpressionTestsHelper()
+            : m_state(std::make_unique<SimpleExpressionTestState>()),
+              m_sequence(std::make_unique<SimpleExpressionSequence>()),
+              m_consumed_token_count(0u)
+        {
+        }
+
+        void Tokens(std::initializer_list<Movable<SimpleParserValue>> tokens)
+        {
+            m_lexer = std::make_unique<MockLexer<SimpleParserValue>>(tokens, SimpleParserValue::EndOfFile(TokenPos()));
+        }
+
+        void Tokens(std::vector<SimpleParserValue> tokens)
+        {
+            m_lexer = std::make_unique<MockLexer<SimpleParserValue>>(std::move(tokens), SimpleParserValue::EndOfFile(TokenPos()));
+        }
+
+        bool PerformTest()
+        {
+            REQUIRE(m_lexer);
+
+            m_consumed_token_count = 0;
+            return m_sequence->MatchSequence(m_lexer.get(), m_state.get(), m_consumed_token_count);
+        }
+    };
+    
+    TEST_CASE("SimpleExpressions: Can parse expression with add operation", "[parsing][simple][expression]")
+    {
+        SimpleExpressionTestsHelper helper;
+        const TokenPos pos;
+        helper.Tokens({
+            SimpleParserValue::Integer(pos, 1336),
+            SimpleParserValue::Character(pos, '+'),
+            SimpleParserValue::Integer(pos, 1),
+            SimpleParserValue::EndOfFile(pos)
+        });
+
+        const auto result = helper.PerformTest();
+
+        REQUIRE(result);
+        REQUIRE(helper.m_consumed_token_count == 3);
+
+        const auto& expression = helper.m_state->m_expression;
+        REQUIRE(expression->IsStatic());
+
+        const auto value = expression->Evaluate();
+        REQUIRE(value.m_type == SimpleExpressionValue::Type::INT);
+        REQUIRE(value.m_int_value == 1337);
+    }
+    
+}

test/ParserTests/main.cpp

@@ -0,0 +1,2 @@
+#define CATCH_CONFIG_MAIN
+#include <catch2/catch.hpp>