more tests with different positions of global variables and multiple reassignments

tests/test_code_replacement.py

@@ -1695,6 +1695,159 @@ print("Hello world")
 
 a=2
 print("Hello world")
+def some_fn():
+    a=np.zeros(10)
+    print("did something")
+class NewClass:
+    def __init__(self, name):
+        self.name = name
+    def __call__(self, value):
+        return "I am still old"
+    def new_function2(value):
+        return cst.ensure_type(value, str)
+    def __init__(self, name):
+        self.name = name
+    def __call__(self, value):
+        return "I am still old"
+    def new_function2(value):
+        return cst.ensure_type(value, str)
+"""
+    code_path = (Path(__file__).parent.resolve() / "../code_to_optimize/global_var_original.py").resolve()
+    code_path.write_text(original_code, encoding="utf-8")
+    tests_root = Path("/Users/codeflash/Downloads/codeflash-dev/codeflash/code_to_optimize/tests/pytest/")
+    project_root_path = (Path(__file__).parent / "..").resolve()
+    func = FunctionToOptimize(function_name="some_fn", parents=[], file_path=code_path)
+    test_config = TestConfig(
+        tests_root=tests_root,
+        tests_project_rootdir=project_root_path,
+        project_root_path=project_root_path,
+        test_framework="pytest",
+        pytest_cmd="pytest",
+    )
+    func_optimizer = FunctionOptimizer(function_to_optimize=func, test_cfg=test_config)
+    code_context: CodeOptimizationContext = func_optimizer.get_code_optimization_context().unwrap()
+    original_helper_code: dict[Path, str] = {}
+    helper_function_paths = {hf.file_path for hf in code_context.helper_functions}
+    for helper_function_path in helper_function_paths:
+        with helper_function_path.open(encoding="utf8") as f:
+            helper_code = f.read()
+            original_helper_code[helper_function_path] = helper_code
+    func_optimizer.args = Args()
+    func_optimizer.replace_function_and_helpers_with_optimized_code(
+        code_context=code_context, optimized_code=optimized_code
+    )
+    new_code = code_path.read_text(encoding="utf-8")
+    code_path.unlink(missing_ok=True)
+    assert new_code.rstrip() == expected_code.rstrip()
+
+    original_code = """print("Hello world")
+def some_fn():
+    print("did noting")
+class NewClass:
+    def __init__(self, name):
+        self.name = name
+    def __call__(self, value):
+        return "I am still old"
+    def new_function2(value):
+        return cst.ensure_type(value, str)
+a=1
+"""
+    optimized_code = """a=2
+import numpy as np
+def some_fn():
+    a=np.zeros(10)
+    print("did something")
+class NewClass:
+    def __init__(self, name):
+        self.name = name
+    def __call__(self, value):
+        return "I am still old"
+    def new_function2(value):
+        return cst.ensure_type(value, str)
+print("Hello world")
+        """
+    expected_code = """import numpy as np
+print("Hello world")
+
+print("Hello world")
+def some_fn():
+    a=np.zeros(10)
+    print("did something")
+class NewClass:
+    def __init__(self, name):
+        self.name = name
+    def __call__(self, value):
+        return "I am still old"
+    def new_function2(value):
+        return cst.ensure_type(value, str)
+    def __init__(self, name):
+        self.name = name
+    def __call__(self, value):
+        return "I am still old"
+    def new_function2(value):
+        return cst.ensure_type(value, str)
+a=2    
+"""
+    code_path = (Path(__file__).parent.resolve() / "../code_to_optimize/global_var_original.py").resolve()
+    code_path.write_text(original_code, encoding="utf-8")
+    tests_root = Path("/Users/codeflash/Downloads/codeflash-dev/codeflash/code_to_optimize/tests/pytest/")
+    project_root_path = (Path(__file__).parent / "..").resolve()
+    func = FunctionToOptimize(function_name="some_fn", parents=[], file_path=code_path)
+    test_config = TestConfig(
+        tests_root=tests_root,
+        tests_project_rootdir=project_root_path,
+        project_root_path=project_root_path,
+        test_framework="pytest",
+        pytest_cmd="pytest",
+    )
+    func_optimizer = FunctionOptimizer(function_to_optimize=func, test_cfg=test_config)
+    code_context: CodeOptimizationContext = func_optimizer.get_code_optimization_context().unwrap()
+    original_helper_code: dict[Path, str] = {}
+    helper_function_paths = {hf.file_path for hf in code_context.helper_functions}
+    for helper_function_path in helper_function_paths:
+        with helper_function_path.open(encoding="utf8") as f:
+            helper_code = f.read()
+            original_helper_code[helper_function_path] = helper_code
+    func_optimizer.args = Args()
+    func_optimizer.replace_function_and_helpers_with_optimized_code(
+        code_context=code_context, optimized_code=optimized_code
+    )
+    new_code = code_path.read_text(encoding="utf-8")
+    code_path.unlink(missing_ok=True)
+    assert new_code.rstrip() == expected_code.rstrip()
+
+    original_code = """a=1
+print("Hello world")
+def some_fn():
+    print("did noting")
+class NewClass:
+    def __init__(self, name):
+        self.name = name
+    def __call__(self, value):
+        return "I am still old"
+    def new_function2(value):
+        return cst.ensure_type(value, str)
+"""
+    optimized_code = """import numpy as np
+a=2
+def some_fn():
+    a=np.zeros(10)
+    print("did something")
+class NewClass:
+    def __init__(self, name):
+        self.name = name
+    def __call__(self, value):
+        return "I am still old"
+    def new_function2(value):
+        return cst.ensure_type(value, str)
+a=3
+print("Hello world")
+    """
+    expected_code = """import numpy as np
+print("Hello world")
+
+a=3
+print("Hello world")
 def some_fn():
     a=np.zeros(10)
     print("did something")