Implement number evaluation

tests/evaluator_tests.c

@@ -0,0 +1,33 @@
+#include "evaluator.h"
+#include "memory_pool.h"
+#include "testing.h"
+
+static memory_pool_t pool;
+
+static void number_1234_is_evaluated_as_1234(void)
+{
+	init_memory_pool(&pool);
+	expression_t *expression = allocate_expression(&pool);
+	expression->is_number = true;
+	expression->number = 1234;
+	const int result = evaluate(expression);
+	ASSERT_EQUAL(1234, result);
+}
+
+static void number_4321_is_evaluated_as_4321(void)
+{
+	init_memory_pool(&pool);
+	expression_t *expression = allocate_expression(&pool);
+	expression->is_number = true;
+	expression->number = 4321;
+	const int result = evaluate(expression);
+	ASSERT_EQUAL(4321, result);
+}
+
+int main(void)
+{
+	TESTING_BEGIN();
+	RUN_TEST(number_1234_is_evaluated_as_1234);
+	RUN_TEST(number_4321_is_evaluated_as_4321);
+	TESTING_END();
+}