#!/usr/bin/env python3
"""
#exonware/xwnode/tests/1.unit/nodes_tests/strategies_tests/test_histogram_strategy.py
Comprehensive tests for Histogram Strategy.
Tests cover:
- Interface compliance (iNodeStrategy)
- Core operations (insert, find, delete)
- Statistical estimation operations
- Security (input validation, resource limits)
- Error handling
- Edge cases
Company: eXonware.com
Author: eXonware Backend Team
Email: connect@exonware.com
Version: 0.1.0.1
Generation Date: 26-Jan-2025
"""

import pytest
from exonware.xwnode.nodes.strategies.histogram import HistogramStrategy
from exonware.xwnode.defs import NodeMode
from exonware.xwnode.errors import XWNodeError
@pytest.fixture

def empty_histogram():
    """Create empty histogram."""
    return HistogramStrategy()
@pytest.fixture

def simple_histogram():
    """Create histogram with data."""
    hist = HistogramStrategy()
    hist.add_value(10)
    hist.add_value(20)
    hist.add_value(30)
    hist.build()
    return hist
@pytest.mark.xwnode_unit
@pytest.mark.xwnode_node_strategy

class TestHistogramStrategy:
    """Test Histogram strategy interface compliance."""

    def test_insert_operation(self, empty_histogram):
        """Test add_value operation works correctly."""
        empty_histogram.add_value(10)
        empty_histogram.build()
        assert empty_histogram.get_total_count() == 1

    def test_find_operation(self, simple_histogram):
        """Test get_total_count returns correct values."""
        assert simple_histogram.get_total_count() == 3

    def test_delete_operation(self, simple_histogram):
        """Test delete is not supported for histogram."""
        assert simple_histogram.delete(10) is False

    def test_size_operation(self, simple_histogram):
        """Test size returns bucket count."""
        assert simple_histogram.size() >= 0

    def test_is_empty_operation(self, empty_histogram, simple_histogram):
        """Test is_empty correctly identifies empty structures."""
        assert empty_histogram.is_empty() is True
        assert simple_histogram.is_empty() is False
