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#!/usr/bin/env python
# Copyright 2025 The HuggingFace Inc. team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Test script for RLearN evaluation metrics.
This script tests the VOC-S and success/failure detection metrics with synthetic data
to ensure they work correctly before running on real datasets.
"""
import numpy as np
from lerobot.policies.rlearn.evaluation import (
compute_success_failure_detection,
compute_voc_s,
generate_mismatched_languages,
)
def test_voc_s():
"""Test VOC-S computation with synthetic data."""
print("Testing VOC-S computation...")
# Test case 1: Perfect positive correlation (0 -> 1)
perfect_positive = [np.linspace(0, 1, 20) for _ in range(10)]
results = compute_voc_s(perfect_positive)
print("Perfect positive correlation:")
print(f" Mean: {results['voc_s_mean']:.4f} (should be ~1.0)")
print(f" IQM: {results['voc_s_iqm']:.4f} (should be ~1.0)")
assert results["voc_s_mean"] > 0.95, f"Expected >0.95, got {results['voc_s_mean']}"
# Test case 2: Perfect negative correlation (1 -> 0)
perfect_negative = [np.linspace(1, 0, 20) for _ in range(10)]
results = compute_voc_s(perfect_negative)
print("Perfect negative correlation:")
print(f" Mean: {results['voc_s_mean']:.4f} (should be ~-1.0)")
print(f" IQM: {results['voc_s_iqm']:.4f} (should be ~-1.0)")
assert results["voc_s_mean"] < -0.95, f"Expected <-0.95, got {results['voc_s_mean']}"
# Test case 3: No correlation (random)
np.random.seed(42)
random_rewards = [np.random.random(20) for _ in range(50)]
results = compute_voc_s(random_rewards)
print("Random correlation:")
print(f" Mean: {results['voc_s_mean']:.4f} (should be ~0.0)")
print(f" IQM: {results['voc_s_iqm']:.4f} (should be ~0.0)")
assert abs(results["voc_s_mean"]) < 0.3, f"Expected ~0, got {results['voc_s_mean']}"
# Test case 4: Mixed correlations
mixed = []
mixed.extend([np.linspace(0, 1, 15) for _ in range(5)]) # Positive
mixed.extend([np.linspace(1, 0, 15) for _ in range(5)]) # Negative
mixed.extend([np.random.random(15) for _ in range(5)]) # Random
results = compute_voc_s(mixed)
print("Mixed correlations:")
print(f" Mean: {results['voc_s_mean']:.4f}")
print(f" IQM: {results['voc_s_iqm']:.4f}")
print(f" Std: {results['voc_s_std']:.4f}")
print("✓ VOC-S tests passed!\n")
def test_success_failure_detection():
"""Test success/failure detection with synthetic data."""
print("Testing Success/Failure Detection...")
# Test case 1: Clear separation (correct > incorrect)
correct_rewards = [np.linspace(0, 1, 20) for _ in range(20)] # Always increasing
incorrect_rewards = [np.linspace(0, 0.3, 20) for _ in range(20)] # Lower final values
results = compute_success_failure_detection(correct_rewards, incorrect_rewards)
print("Clear separation test:")
print(f" Detection accuracy: {results['detection_accuracy']:.4f} (should be 1.0)")
print(f" Mean correct: {results['mean_correct_final']:.4f}")
print(f" Mean incorrect: {results['mean_incorrect_final']:.4f}")
print(f" Separation score: {results['separation_score']:.4f}")
assert results["detection_accuracy"] == 1.0, f"Expected 1.0, got {results['detection_accuracy']}"
# Test case 2: No separation (same distributions with some randomness)
np.random.seed(42)
same_rewards_1 = [np.random.normal(0.5, 0.05, 15) for _ in range(20)]
same_rewards_2 = [np.random.normal(0.5, 0.05, 15) for _ in range(20)]
results = compute_success_failure_detection(same_rewards_1, same_rewards_2)
print("No separation test:")
print(f" Detection accuracy: {results['detection_accuracy']:.4f} (should be ~0.5)")
print(f" Separation score: {results['separation_score']:.4f} (should be ~0.0)")
# Relax the assertion since random data can vary
assert 0.2 <= results["detection_accuracy"] <= 0.8, (
f"Expected ~0.5 (±0.3), got {results['detection_accuracy']}"
)
# Test case 3: Partial separation
np.random.seed(42)
partial_correct = [np.random.normal(0.7, 0.1, 10) for _ in range(20)]
partial_incorrect = [np.random.normal(0.4, 0.1, 10) for _ in range(20)]
results = compute_success_failure_detection(partial_correct, partial_incorrect)
print("Partial separation test:")
print(f" Detection accuracy: {results['detection_accuracy']:.4f}")
print(f" Separation score: {results['separation_score']:.4f}")
print("✓ Success/Failure Detection tests passed!\n")
def test_mismatch_generation():
"""Test mismatch language generation."""
print("Testing mismatch language generation...")
original_languages = [
"pick up the red ball",
"put the cup on the table",
"open the drawer",
"close the door",
]
# Test with default templates
mismatched = generate_mismatched_languages(original_languages)
print(f"Original languages: {len(original_languages)}")
print(f"Mismatched languages: {len(mismatched)}")
assert len(mismatched) == len(original_languages)
# Ensure they're actually different
for orig, mismatch in zip(original_languages, mismatched, strict=False):
print(f" '{orig}' -> '{mismatch}'")
assert orig != mismatch, "Mismatch should be different from original"
# Test with custom templates
custom_templates = ["dance", "sing", "jump"]
mismatched_custom = generate_mismatched_languages(original_languages, custom_templates)
print("\nWith custom templates:")
for orig, mismatch in zip(original_languages, mismatched_custom, strict=False):
print(f" '{orig}' -> '{mismatch}'")
assert mismatch in custom_templates
print("✓ Mismatch generation tests passed!\n")
def test_edge_cases():
"""Test edge cases and error handling."""
print("Testing edge cases...")
# Empty input
empty_results = compute_voc_s([])
assert empty_results["num_episodes"] == 0
assert empty_results["voc_s_mean"] == 0.0
# Single frame episodes (should be skipped)
single_frame = [np.array([0.5]) for _ in range(5)]
results = compute_voc_s(single_frame)
assert results["num_episodes"] == 0, "Single-frame episodes should be skipped"
# Constant rewards (should give correlation = 0)
constant_rewards = [np.ones(10) * 0.5 for _ in range(5)]
results = compute_voc_s(constant_rewards)
print(f"Constant rewards correlation: {results['voc_s_mean']:.4f} (should be 0.0)")
assert results["voc_s_mean"] == 0.0
# Mismatched array lengths for detection
try:
compute_success_failure_detection([np.array([1, 2])], [])
assert False, "Should have raised ValueError"
except ValueError:
pass # Expected
print("✓ Edge case tests passed!\n")
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#!/usr/bin/env python
# Copyright 2025 The HuggingFace Inc. team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import torch
from lerobot.configs.types import FeatureType, PolicyFeature
from lerobot.constants import OBS_IMAGES, OBS_LANGUAGE, REWARD
from lerobot.policies.factory import make_processor
from lerobot.policies.rlearn.configuration_rlearn import RLearNConfig
from lerobot.policies.rlearn.modeling_rlearn import RLearNPolicy
from tests.utils import require_package
@require_package("transformers")
def test_rlearn_instantiation_and_forward_tensor_batch():
"""Instantiate RLearN and run a forward pass with a (B, T, C, H, W) tensor input using a real model and real text."""
cfg = RLearNConfig(
model_name="google/siglip2-large-patch16-256",
push_to_hub=False,
freeze_backbones=True,
)
cfg.input_features = {
"observation.image": PolicyFeature(type=FeatureType.VISUAL, shape=(3, 224, 224)),
}
cfg.output_features = {
REWARD: PolicyFeature(type=FeatureType.REWARD, shape=(1,)),
}
policy = RLearNPolicy(cfg)
B, T, C, H, W = 2, 3, 3, 256, 256
batch = {
OBS_IMAGES: torch.rand(B, T, C, H, W),
REWARD: torch.randint(low=0, high=1, size=(B, T)).float(),
OBS_LANGUAGE: ["move the green cube into the box" for _ in range(B)],
}
loss, logs = policy.forward(batch)
assert isinstance(loss, torch.Tensor)
assert "loss" in logs
@require_package("transformers")
def test_rlearn_instantiation_and_forward_list_batch_with_language():
"""Instantiate RLearN and run a forward pass with a list-of-frames input and real language using a real model."""
cfg = RLearNConfig(
model_name="google/siglip2-large-patch16-256",
push_to_hub=False,
freeze_backbones=True,
)
cfg.input_features = {
"observation.image": PolicyFeature(type=FeatureType.VISUAL, shape=(3, 224, 224)),
}
cfg.output_features = {
REWARD: PolicyFeature(type=FeatureType.REWARD, shape=(1,)),
}
policy = RLearNPolicy(cfg)
B, T, C, H, W = 2, 4, 3, 256, 256
frames = [torch.rand(B, C, H, W) for _ in range(T)]
batch = {
OBS_IMAGES: frames, # list[(B, C, H, W)]
REWARD: torch.randint(low=0, high=2, size=(B, T)).float(),
OBS_LANGUAGE: ["move the red cube into the box" for _ in range(B)],
}
loss, logs = policy.forward(batch)
assert isinstance(loss, torch.Tensor)
assert "loss" in logs
@require_package("transformers")
def test_rlearn_composite_loss_shapes_and_terms():
"""Smoke test composite loss: checks presence of terms and valid gradients."""
cfg = RLearNConfig(
model_name="google/siglip2-large-patch16-256",
push_to_hub=False,
freeze_backbones=True,
loss_type="composite",
lambda_prog=1.0,
lambda_spatial_nce=0.5,
lambda_rewind=0.4,
num_ranking_pairs=32, # Fewer pairs for testing
last_k_for_nce=2,
)
cfg.input_features = {
"observation.image": PolicyFeature(type=FeatureType.VISUAL, shape=(3, 224, 224)),
}
cfg.output_features = {
REWARD: PolicyFeature(type=FeatureType.REWARD, shape=(1,)),
}
policy = RLearNPolicy(cfg)
B, T, C, H, W = 2, 3, 3, 256, 256
# Progress labels y in [0,1]
y = torch.linspace(0, 1, T).unsqueeze(0).repeat(B, 1)
batch = {
OBS_IMAGES: torch.rand(B, T, C, H, W),
REWARD: y.clone(),
OBS_LANGUAGE: ["stack the blocks" for _ in range(B)],
}
loss, logs = policy.forward(batch)
assert isinstance(loss, torch.Tensor) and torch.isfinite(loss)
# Expect composite terms present with spatial awareness and ReWiND
assert "loss_prog" in logs
assert "loss_spatial_nce" in logs
assert "loss_rewind_forward" in logs
assert "loss_rewind_reverse" in logs
@require_package("transformers")
def test_rlearn_preprocessor_tokenizes_and_copies_task():
cfg = RLearNConfig(
model_name="google/siglip2-large-patch16-256",
device="cpu",
push_to_hub=False,
)
cfg.input_features = {
"observation.image": PolicyFeature(type=FeatureType.VISUAL, shape=(3, 64, 64)),
}
cfg.output_features = {
REWARD: PolicyFeature(type=FeatureType.REWARD, shape=(1,)),
}
pre, post = make_processor(cfg, dataset_stats=None)
B, C, H, W = 2, 3, 64, 64
batch = {
"observation.image": torch.rand(B, C, H, W),
REWARD: torch.zeros(B),
"task": ["pick the cube", "place it in the box"],
}
processed = pre(batch)
assert isinstance(processed, dict)
assert f"{OBS_LANGUAGE}.tokens" in processed
assert f"{OBS_LANGUAGE}.attention_mask" in processed
assert OBS_LANGUAGE in processed
tokens = processed[f"{OBS_LANGUAGE}.tokens"]
attn = processed[f"{OBS_LANGUAGE}.attention_mask"]
assert tokens.dim() == 2 and attn.dim() == 2
assert tokens.shape[0] == B and attn.shape[0] == B
@require_package("transformers")
def test_rlearn_preprocessor_string_task_and_to_batch():
cfg = RLearNConfig(
model_name="google/siglip2-large-patch16-256",
device="cpu",
push_to_hub=False,
)
cfg.input_features = {
"observation.image": PolicyFeature(type=FeatureType.VISUAL, shape=(3, 64, 64)),
}
cfg.output_features = {
REWARD: PolicyFeature(type=FeatureType.REWARD, shape=(1,)),
}
pre, post = make_processor(cfg, dataset_stats=None)
# Unbatched image and single string task
batch = {
"observation.image": torch.rand(3, 64, 64),
REWARD: torch.tensor(0.0),
"task": "move the green cube into the box",
}
processed = pre(batch)
# Image should have batch dim now
assert processed["observation.image"].dim() == 4 and processed["observation.image"].shape[0] == 1
# Language copy and tokenization should exist
assert OBS_LANGUAGE in processed and isinstance(processed[OBS_LANGUAGE], list)
assert f"{OBS_LANGUAGE}.tokens" in processed
assert f"{OBS_LANGUAGE}.attention_mask" in processed
@require_package("transformers")
def test_rlearn_pipeline_end_to_end_forward():
"""End-to-end: preprocessor + model forward using RLearN pipeline on synthetic data."""
cfg = RLearNConfig(
model_name="google/siglip2-large-patch16-256",
device="cpu",
push_to_hub=False,
freeze_backbones=True,
loss_type="composite",
)
cfg.input_features = {
"observation.image": PolicyFeature(type=FeatureType.VISUAL, shape=(3, 224, 224)),
}
cfg.output_features = {
REWARD: PolicyFeature(type=FeatureType.REWARD, shape=(1,)),
}
# Build processors and model
pre, post = make_processor(cfg, dataset_stats=None)
policy = RLearNPolicy(cfg)
B, T, C, H, W = 2, 3, 3, 256, 256
y = torch.linspace(0, 1, T).unsqueeze(0).repeat(B, 1)
raw = {
# Provide as observation.image to let preprocessor map/normalize and batch
"observation.image": torch.rand(B, C, H, W), # not time-major to test ToBatch
REWARD: y[:, :1].clone(), # single step label; pipeline keeps structure
"task": ["insert the peg", "insert the peg"],
}
processed = pre(raw)
# Integrate preprocessor output with model forward
loss, logs = policy.forward(
{
OBS_IMAGES: processed.get(OBS_IMAGES, processed.get("observation.image"))
.unsqueeze(1)
.repeat(1, T, 1, 1, 1),
REWARD: y.clone(),
OBS_LANGUAGE: processed[OBS_LANGUAGE],
}
)
assert isinstance(loss, torch.Tensor) and torch.isfinite(loss)