moved some stuff around in an attempt to make

things cleaner (not sure it is, but we tryin)

test/utils/fixtures.cpp

@@ -0,0 +1,33 @@
+#include "utils.hpp"
+
+#include <doctest.h>
+
+namespace test::utils {
+    void check_parser_errors(const std::vector<ast::error::error*>& errors) {
+        if (errors.empty())
+            return;
+
+        INFO("parser has " << errors.size() << " errors:");
+        std::ostringstream combined;
+        for (auto& err : errors)
+            combined << "  > " << err->what() << '\n';
+
+        INFO(combined.str());
+
+        FAIL("Parser had errors.");
+    }
+
+    void ParserFixture::setup(std::string source) {
+        input.clear();
+        input << source;
+        lexer = std::make_unique<lexer::lexer>(input);
+        parser = std::make_unique<parser::parser>(*lexer);
+        program = parser->parse_program();
+        check_parser_errors(parser->errors);
+
+        REQUIRE_MESSAGE(
+            program != nullptr,
+            "parse_program() returned a null pointer"
+        );
+    }
+} // namespace test::utils