text: """Test cases for IR generation."""
  
  import os.path
  
  from mypy.test.config import test_temp_dir
  from mypy.test.data import DataDrivenTestCase
  from mypy.errors import CompileError
  
  from mypyc.common import TOP_LEVEL_NAME
  from mypyc.ir.func_ir import format_func
  from mypyc.test.testutil import (
      ICODE_GEN_BUILTINS, use_custom_builtins, MypycDataSuite, build_ir_for_single_file,
      assert_test_output, remove_comment_lines, replace_native_int
  )
  from mypyc.options import CompilerOptions
  
  files = [
      'irbuild-basic.test',
      'irbuild-lists.test',
      'irbuild-dict.test',
      'irbuild-statements.test',
      'irbuild-nested.test',
      'irbuild-classes.test',
      'irbuild-optional.test',
      'irbuild-tuple.test',
      'irbuild-any.test',
      'irbuild-generics.test',
      'irbuild-try.test',
      'irbuild-set.test',
      'irbuild-strip-asserts.test',
      'irbuild-int.test',
  ]
  
  
  class TestGenOps(MypycDataSuite):
      files = files
      base_path = test_temp_dir
      optional_out = True
  
      def run_case(self, testcase: DataDrivenTestCase) -> None:
          # Kind of hacky. Not sure if we need more structure here.
          options = CompilerOptions(strip_asserts='StripAssert' in testcase.name)
          """Perform a runtime checking transformation test case."""
          with use_custom_builtins(os.path.join(self.data_prefix, ICODE_GEN_BUILTINS), testcase):
              expected_output = remove_comment_lines(testcase.output)
              expected_output = replace_native_int(expected_output)
              try:
                  ir = build_ir_for_single_file(testcase.input, options)
              except CompileError as e:
                  actual = e.messages
              else:
                  actual = []
                  for fn in ir:
                      if (fn.name == TOP_LEVEL_NAME
                              and not testcase.name.endswith('_toplevel')):
                          continue
                      actual.extend(format_func(fn))
  
              assert_test_output(testcase, actual, 'Invalid source code output',
                                 expected_output)
  