diff --git a/scripts/pipeline_generator/pipeline_generator_helper.py b/scripts/pipeline_generator/pipeline_generator_helper.py
new file mode 100644
index 0000000..ab02d95
--- /dev/null
+++ b/scripts/pipeline_generator/pipeline_generator_helper.py
@@ -0,0 +1,14 @@
+from typing import List
+
+from .step import TestStep
+
+def step_should_run(step: TestStep, run_all: bool, list_file_diff: List[str]) -> bool:
+    """Determine whether the step should automatically run or not."""
+    if step.optional:
+        return False
+    if not step.source_file_dependencies or run_all:
+        return True
+    return any(source_file in diff_file
+        for source_file in step.source_file_dependencies
+        for diff_file in list_file_diff
+    )
diff --git a/scripts/tests/pipeline_generator/test_pipeline_generator_helper.py b/scripts/tests/pipeline_generator/test_pipeline_generator_helper.py
new file mode 100644
index 0000000..d0a9003
--- /dev/null
+++ b/scripts/tests/pipeline_generator/test_pipeline_generator_helper.py
@@ -0,0 +1,50 @@
+import pytest
+import sys
+
+from scripts.pipeline_generator.pipeline_generator_helper import step_should_run
+from scripts.pipeline_generator.step import TestStep
+
+def _get_test_step():
+    return TestStep(
+        label="Test",
+        command="echo 'Hello, World!'",
+    )
+
+@pytest.mark.parametrize(
+    ("run_all, source_file_dependencies, list_file_diff, expected"), 
+    [
+        (False, None, [], True),
+        (True, None, [], True),
+        (False, ["file1", "file2"], [], False),
+        (True, ["file1", "file2"], [], True),
+        (False, ["file1", "file2"], ["file1"], True),
+        (False, ["file1", "file2"], ["file3"], False),
+        (True, ["file1", "file2"], ["file3"], True),
+    ]
+)
+def test_step_should_run(run_all, source_file_dependencies, list_file_diff, expected):
+    test_step = _get_test_step()
+    test_step.source_file_dependencies = source_file_dependencies
+    assert step_should_run(test_step, run_all, list_file_diff) == expected
+
+@pytest.mark.parametrize(
+    ("run_all, source_file_dependencies, list_file_diff"), 
+    [
+        (False, None, []),
+        (True, None, []),
+        (False, ["file1", "file2"], []),
+        (True, ["file1", "file2"], []),
+        (False, ["file1", "file2"], ["file1"]),
+        (False, ["file1", "file2"], ["file3"]),
+        (True, ["file1", "file2"], ["file3"]),
+    ]
+)
+def test_step_should_run_optional(run_all, source_file_dependencies, list_file_diff):
+    test_step = _get_test_step()
+    test_step.optional = True # When optional is True, step should not run at all
+    test_step.source_file_dependencies = source_file_dependencies
+
+    assert step_should_run(test_step, run_all, list_file_diff) == False
+
+if __name__ == "__main__":
+    sys.exit(pytest.main(["-v", __file__]))