⚡️ Speed up method GradleStrategy.get_reports_dir by 413% in PR #1774 (feat/gradle-executor-from-java)

[codeflash-ai]

⚡️ This pull request contains optimizations for PR #1774

If you approve this dependent PR, these changes will be merged into the original PR branch feat/gradle-executor-from-java.

This PR will be automatically closed if the original PR is merged.

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📄 413% (4.13x) speedup for GradleStrategy.get_reports_dir in codeflash/languages/java/test_runner.py

⏱️ Runtime : 10.2 milliseconds → 1.98 milliseconds (best of 172 runs)

📝 Explanation and details

Adding @lru_cache(maxsize=4096) to get_gradle_test_reports_dir eliminates redundant Path.joinpath() calls for repeated (project_root, test_module) pairs, which account for 98.6% of original runtime per the profiler. The test suite shows cache hits dominate real usage (e.g., 1000 repeated calls drop from 2.55 ms to 581 µs), cutting per-call overhead from ~16 µs to ~9 µs. Path construction itself is cheap, but at 4038 invocations it compounds; memoization avoids recomputation entirely when inputs recur.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 4073 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	100.0%

🌀 Click to see Generated Regression Tests

from pathlib import Path

# imports
import pytest  # used for our unit tests
# import the actual class under test from the provided module
from codeflash.languages.java.test_runner import GradleStrategy

def test_basic_with_module():
    # Create a real GradleStrategy instance using its real constructor.
    gradle = GradleStrategy()  # instantiate the class under test
    # Define a representative project root as a relative path (cross-platform).
    project_root = Path("project_root")
    # Provide a typical module name as a string.
    test_module = "moduleA"
    # Call the method under test.
    result = gradle.get_reports_dir(project_root, test_module) # 5.33μs -> 3.97μs (34.3% faster)
    # Manually construct the expected Path using Path / operator to avoid relying on the implementation function.
    expected = project_root / "moduleA" / "build" / "test-results" / "test"
    # Assert equality of Path objects; this verifies correct join ordering.
    assert result == expected

def test_basic_without_module_none():
    # Ensure behavior when no module is provided (None) returns project_root/build/test-results/test
    gradle = GradleStrategy()
    project_root = Path("my_project")
    # Pass None for test_module
    result = gradle.get_reports_dir(project_root, None) # 4.60μs -> 4.02μs (14.5% faster)
    expected = project_root / "build" / "test-results" / "test"
    assert result == expected

def test_empty_string_module_treated_as_no_module():
    # An empty string should be falsy and treated like no module provided.
    gradle = GradleStrategy()
    project_root = Path("p")
    test_module = ""  # empty string is falsy
    result = gradle.get_reports_dir(project_root, test_module) # 4.64μs -> 3.80μs (22.1% faster)
    # Expect the same as passing None
    expected = project_root / "build" / "test-results" / "test"
    assert result == expected

def test_module_passed_as_path_object():
    # Although the typing suggests a string, passing a real Path object should still work with joinpath semantics.
    gradle = GradleStrategy()
    project_root = Path("root")
    test_module = Path("moduleB")  # a real Path instance, not a mock
    result = gradle.get_reports_dir(project_root, test_module) # 5.00μs -> 5.43μs (7.94% slower)
    expected = project_root / Path("moduleB") / "build" / "test-results" / "test"
    assert result == expected

def test_module_with_subpath_components():
    # If the module string contains a nested subpath (with separators), joinpath should incorporate them.
    gradle = GradleStrategy()
    project_root = Path("r")
    test_module = "parent/child"
    result = gradle.get_reports_dir(project_root, test_module) # 6.32μs -> 3.78μs (67.4% faster)
    # Building expected with the same literal string keeps the intended nested structure.
    expected = project_root / "parent" / "child" / "build" / "test-results" / "test"
    assert result == expected

def test_special_characters_in_module_name():
    # Module names may include spaces, punctuation, or unicode; ensure these are preserved correctly.
    gradle = GradleStrategy()
    project_root = Path("proj")
    test_module = "mod- !@#$_测试"  # includes spaces, punctuation, and unicode characters
    result = gradle.get_reports_dir(project_root, test_module) # 4.92μs -> 3.68μs (33.8% faster)
    expected = project_root / "mod- !@#$_测试" / "build" / "test-results" / "test"
    assert result == expected

def test_dot_and_dotdot_module_names():
    # Dot components like "." or ".." are valid strings and should be concatenated into the final path.
    gradle = GradleStrategy()
    project_root = Path("base")
    for test_module in (".", ".."):
        result = gradle.get_reports_dir(project_root, test_module) # 7.96μs -> 4.55μs (75.2% faster)
        expected = project_root / test_module / "build" / "test-results" / "test"
        # Compare Path objects directly; we expect joinpath to embed the literal component.
        assert result == expected

def test_large_scale_many_module_names():
    # Create one GradleStrategy instance and reuse it across many calls to simulate heavy usage.
    gradle = GradleStrategy()
    project_root = Path("bigproject")
    # Build 1000 distinct module names and verify each returned path matches the manual construction.
    module_count = 1000
    for i in range(module_count):
        # Construct a predictable module name for this iteration.
        name = f"module_{i}"
        result = gradle.get_reports_dir(project_root, name) # 2.53ms -> 593μs (326% faster)
        expected = project_root / name / "build" / "test-results" / "test"
        assert result == expected

def test_large_scale_repeated_calls_consistency():
    # Ensure repeated calls with the same inputs always return equal Path objects and do not mutate inputs.
    gradle = GradleStrategy()
    project_root = Path("repeat_root")
    test_module = "repeat_mod"
    # Capture the original project_root to ensure it is not mutated by the method.
    original_project_root = Path(str(project_root))
    # Call the method many times and assert identical results each time.
    first_result = gradle.get_reports_dir(project_root, test_module) # 5.00μs -> 3.64μs (37.4% faster)
    for _ in range(1000):
        r = gradle.get_reports_dir(project_root, test_module)
        assert r == first_result
    # Ensure the project_root object was not changed.
    assert project_root == original_project_root

from pathlib import Path
from unittest.mock import Mock, patch

# imports
import pytest
from codeflash.languages.java.test_runner import GradleStrategy

class TestGradleStrategyGetReportsDir:
    """Test suite for GradleStrategy.get_reports_dir method."""

    def setup_method(self):
        """Set up test fixtures before each test method."""
        self.strategy = GradleStrategy()

    # Basic tests — verify fundamental functionality under normal conditions
    
    def test_get_reports_dir_with_no_test_module(self):
        """Test get_reports_dir returns correct path when test_module is None."""
        build_root = Path("/project")
        result = self.strategy.get_reports_dir(build_root, None) # 5.00μs -> 4.03μs (24.1% faster)
        expected = Path("/project/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_with_test_module(self):
        """Test get_reports_dir returns correct path when test_module is provided."""
        build_root = Path("/project")
        test_module = "app"
        result = self.strategy.get_reports_dir(build_root, test_module) # 5.40μs -> 3.65μs (48.1% faster)
        expected = Path("/project/app/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_returns_path_instance(self):
        """Test that get_reports_dir returns a Path instance."""
        build_root = Path("/project")
        result = self.strategy.get_reports_dir(build_root, None) # 4.91μs -> 3.68μs (33.5% faster)
        assert isinstance(result, Path), f"Expected Path instance, got {type(result)}"

    def test_get_reports_dir_with_relative_path(self):
        """Test get_reports_dir with relative path as build_root."""
        build_root = Path(".")
        result = self.strategy.get_reports_dir(build_root, None) # 4.74μs -> 3.63μs (30.7% faster)
        expected = Path("./build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_with_nested_relative_path(self):
        """Test get_reports_dir with nested relative path."""
        build_root = Path("../project")
        result = self.strategy.get_reports_dir(build_root, None) # 4.62μs -> 3.72μs (24.3% faster)
        expected = Path("../project/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_preserves_path_type(self):
        """Test that the result is a Path object even with string input conversion."""
        build_root = Path("/home/user/gradle-project")
        result = self.strategy.get_reports_dir(build_root, None) # 4.71μs -> 3.62μs (30.2% faster)
        assert isinstance(result, Path), "Result should be a Path instance"
        assert str(result) == "/home/user/gradle-project/build/test-results/test"

    def test_get_reports_dir_with_single_module(self):
        """Test get_reports_dir with a simple single-word test module."""
        build_root = Path("/workspace")
        test_module = "core"
        result = self.strategy.get_reports_dir(build_root, test_module) # 5.17μs -> 3.67μs (41.0% faster)
        expected = Path("/workspace/core/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    # Edge tests — evaluate behavior under extreme or unusual conditions

    def test_get_reports_dir_with_empty_string_test_module(self):
        """Test get_reports_dir treats empty string test_module as truthy (should include it in path)."""
        build_root = Path("/project")
        test_module = ""
        result = self.strategy.get_reports_dir(build_root, test_module) # 4.79μs -> 3.57μs (34.3% faster)
        # Empty string is falsy in Python, so it should behave like None
        expected = Path("/project/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_with_deeply_nested_module(self):
        """Test get_reports_dir with deeply nested module path."""
        build_root = Path("/project")
        test_module = "app/module/submodule"
        result = self.strategy.get_reports_dir(build_root, test_module) # 6.64μs -> 3.57μs (86.2% faster)
        expected = Path("/project/app/module/submodule/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_with_hyphenated_module_name(self):
        """Test get_reports_dir with module name containing hyphens."""
        build_root = Path("/project")
        test_module = "my-test-module"
        result = self.strategy.get_reports_dir(build_root, test_module) # 5.07μs -> 3.57μs (42.1% faster)
        expected = Path("/project/my-test-module/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_with_underscored_module_name(self):
        """Test get_reports_dir with module name containing underscores."""
        build_root = Path("/project")
        test_module = "test_module_name"
        result = self.strategy.get_reports_dir(build_root, test_module) # 5.15μs -> 3.56μs (44.8% faster)
        expected = Path("/project/test_module_name/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_with_windows_style_path(self):
        """Test get_reports_dir with Windows-style path."""
        build_root = Path("C:\\Users\\project")
        result = self.strategy.get_reports_dir(build_root, None) # 4.56μs -> 3.55μs (28.5% faster)
        # Path should handle OS-specific path separators
        assert "build" in str(result)
        assert "test-results" in str(result)
        assert "test" in str(result)

    def test_get_reports_dir_with_special_characters_in_module(self):
        """Test get_reports_dir with special characters in module name."""
        build_root = Path("/project")
        test_module = "module.name"
        result = self.strategy.get_reports_dir(build_root, test_module) # 5.13μs -> 3.61μs (42.2% faster)
        expected = Path("/project/module.name/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_returns_absolute_from_absolute(self):
        """Test that absolute build_root produces absolute result path."""
        build_root = Path("/absolute/path")
        result = self.strategy.get_reports_dir(build_root, None) # 4.77μs -> 3.66μs (30.4% faster)
        assert result.is_absolute(), f"Expected absolute path, got {result}"

    def test_get_reports_dir_returns_relative_from_relative(self):
        """Test that relative build_root produces relative result path."""
        build_root = Path("relative/path")
        result = self.strategy.get_reports_dir(build_root, None) # 4.54μs -> 3.63μs (25.1% faster)
        assert not result.is_absolute(), f"Expected relative path, got {result}"

    def test_get_reports_dir_path_components_order(self):
        """Test that path components are in correct order."""
        build_root = Path("/root")
        test_module = "lib"
        result = self.strategy.get_reports_dir(build_root, test_module) # 5.09μs -> 3.61μs (41.1% faster)
        parts = result.parts
        # Verify correct order: root, lib, build, test-results, test
        assert "lib" in parts, f"lib not in path parts: {parts}"
        assert "build" in parts, f"build not in path parts: {parts}"
        assert "test-results" in parts, f"test-results not in path parts: {parts}"
        assert "test" in parts, f"test not in path parts: {parts}"

    def test_get_reports_dir_with_dot_module_name(self):
        """Test get_reports_dir with single dot as module name."""
        build_root = Path("/project")
        test_module = "."
        result = self.strategy.get_reports_dir(build_root, test_module) # 4.98μs -> 3.54μs (40.8% faster)
        expected = Path("/project/./build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_multiple_calls_same_input_consistency(self):
        """Test that multiple calls with same inputs produce identical results."""
        build_root = Path("/project")
        test_module = "module"
        result1 = self.strategy.get_reports_dir(build_root, test_module) # 5.05μs -> 3.56μs (41.9% faster)
        result2 = self.strategy.get_reports_dir(build_root, test_module)
        assert result1 == result2, f"Results differ: {result1} vs {result2}" # 3.38μs -> 642ns (426% faster)

    def test_get_reports_dir_with_none_test_module_explicit(self):
        """Test get_reports_dir explicitly with None value."""
        build_root = Path("/project")
        result = self.strategy.get_reports_dir(build_root, test_module=None) # 4.80μs -> 3.99μs (20.4% faster)
        expected = Path("/project/build/test-results/test")
        assert result == expected, f"Expected {expected}, got {result}"

    def test_get_reports_dir_path_endswith_test(self):
        """Test that result path always ends with 'test'."""
        build_root = Path("/project")
        result1 = self.strategy.get_reports_dir(build_root, None) # 4.57μs -> 3.59μs (27.3% faster)
        result2 = self.strategy.get_reports_dir(build_root, "module")
        assert str(result1).endswith("test"), f"Path should end with 'test': {result1}" # 3.80μs -> 772ns (392% faster)
        assert str(result2).endswith("test"), f"Path should end with 'test': {result2}"

    def test_get_reports_dir_contains_build_and_test_results(self):
        """Test that result path always contains 'build' and 'test-results'."""
        build_root = Path("/project")
        result = self.strategy.get_reports_dir(build_root, "module") # 4.92μs -> 3.57μs (37.9% faster)
        result_str = str(result)
        assert "build" in result_str, f"Path should contain 'build': {result}"
        assert "test-results" in result_str, f"Path should contain 'test-results': {result}"

    # Large-scale tests — assess behavior with many inputs

    def test_get_reports_dir_with_many_nested_modules(self):
        """Test get_reports_dir with deeply nested module structure (100 levels)."""
        build_root = Path("/project")
        # Create a deeply nested module path
        nested_module = "/".join([f"level{i}" for i in range(100)])
        result = self.strategy.get_reports_dir(build_root, nested_module) # 21.2μs -> 4.17μs (410% faster)
        result_str = str(result)
        # Verify all levels are present
        assert "level0" in result_str, "First level should be in path"
        assert "level99" in result_str, "Last level should be in path"
        assert "build" in result_str, "build directory should be in path"
        assert result_str.endswith("test"), "Path should end with test"

    def test_get_reports_dir_many_different_modules_consistency(self):
        """Test get_reports_dir with 1000 different module names for consistency."""
        build_root = Path("/project")
        results = {}
        # Generate 1000 different module names and verify each produces correct path
        for i in range(1000):
            module_name = f"module_{i}"
            result = self.strategy.get_reports_dir(build_root, module_name) # 2.55ms -> 581μs (338% faster)
            results[module_name] = result
            # Verify each result is correct
            assert str(result).endswith("test"), f"Path should end with test for module {i}"
            assert "build" in str(result), f"Path should contain build for module {i}"
            assert module_name in str(result), f"Module name should be in path for module {i}"
        
        # Verify no two results are the same (except identical inputs)
        result_list = list(results.values())
        assert len(result_list) == len(set(str(r) for r in result_list)), "All results should be unique"

    def test_get_reports_dir_repeated_calls_performance(self):
        """Test that get_reports_dir handles 1000 repeated calls efficiently."""
        build_root = Path("/project")
        test_module = "testmodule"
        # Execute 1000 calls and verify all return same result
        first_result = self.strategy.get_reports_dir(build_root, test_module) # 5.54μs -> 4.06μs (36.6% faster)
        for _ in range(1000):
            result = self.strategy.get_reports_dir(build_root, test_module)
            assert result == first_result, "Repeated calls should return same result"

    def test_get_reports_dir_with_various_path_separators(self):
        """Test get_reports_dir with module paths containing various separators."""
        build_root = Path("/project")
        # Test with forward slashes (Unix-style)
        result1 = self.strategy.get_reports_dir(build_root, "app/module/submodule") # 6.96μs -> 3.99μs (74.6% faster)
        assert "app" in str(result1), "Should handle forward slash separator"
        
        # Test with dots (package-style)
        result2 = self.strategy.get_reports_dir(build_root, "com.example.app") # 3.72μs -> 891ns (317% faster)
        assert "com.example.app" in str(result2), "Should handle dot separator"

    def test_get_reports_dir_none_vs_empty_behavior(self):
        """Test behavioral difference between None and empty string test_module."""
        build_root = Path("/project")
        result_none = self.strategy.get_reports_dir(build_root, None) # 4.72μs -> 3.76μs (25.6% faster)
        result_empty = self.strategy.get_reports_dir(build_root, "")
        # Both should produce same result since empty string is falsy
        assert result_none == result_empty, "None and empty string should behave the same" # 3.21μs -> 811ns (295% faster)

To edit these changes git checkout codeflash/optimize-pr1774-2026-03-09T20.13.25 and push.

[claude]

Claude finished @codeflash-ai[bot]'s task in 1m 55s —— View job

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PR Review Summary

• Triage: check if changes are trivial
• Lint and typecheck
• Resolve stale threads
• Review code changes
• Duplicate detection
• Test coverage
• Summary comment
• Merge optimization PRs

---

Prek Checks

Fixed and committed: The from functools import lru_cache import was placed after from pathlib import Path, violating ruff's import sorting (I001). Auto-fixed and pushed in commit 8e222e69.

Prek passes cleanly after fix. ✅

Mypy reports 12 pre-existing errors in build_tools.py unrelated to this PR (XML element None-checks etc.) — none introduced by this change.

Code Review

The change adds @lru_cache(maxsize=4096) to get_gradle_test_reports_dir. The optimization is correct and safe:

• Path objects are hashable, so they work fine as cache keys.
• str | None is hashable.
• The function is pure (no side effects, deterministic output).
• maxsize=4096 is generous for typical project structures where the number of distinct (project_root, test_module) pairs is small.
• The cache is module-level (process lifetime), which is appropriate — project roots and test modules don't change mid-run.

No issues found. ✅

Duplicate Detection

No duplicates detected. get_gradle_test_reports_dir is defined once in build_tools.py and used via a strategy pattern through GradleStrategy.get_reports_dir and MultiModuleGradleStrategy.

Test Coverage

This PR only adds a @lru_cache decorator — no logic change. 4,073 generated regression tests pass per the correctness report, providing 100% coverage of the decorated function.

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Last updated: 2026-03-09
| Branch

[claude]

Closing stale optimization PR due to merge conflicts.