fix session expired and try variant timing

tests/test_randomized_timing.py

@@ -0,0 +1,66 @@
+"""Tests for randomized timing functionality"""
+import pytest
+import random
+
+
+def get_randomized_interval(base_interval: int = 150, variance: int = 30) -> int:
+    """Get check interval with random variance to avoid bot detection patterns."""
+    variance_value = random.randint(-variance, variance)
+    interval = base_interval + variance_value
+    # Ensure minimum of 60 seconds to avoid excessive load
+    return max(60, interval)
+
+
+class TestRandomizedTiming:
+    """Test randomized check interval functionality"""
+
+    def test_randomized_interval_within_bounds(self):
+        """Test that randomized interval stays within expected bounds"""
+        # Test multiple intervals to ensure randomization
+        intervals = [get_randomized_interval(150, 30) for _ in range(100)]
+
+        # All intervals should be between 120 and 180 (150 ± 30)
+        assert all(120 <= i <= 180 for i in intervals), f"Some intervals outside bounds"
+
+        # Should have some variance (not all the same)
+        assert len(set(intervals)) > 1, "No randomization detected - all intervals are identical"
+
+    def test_minimum_interval_enforced(self):
+        """Test that minimum 60s interval is enforced even with high variance"""
+        # Test multiple times with extreme variance
+        intervals = [get_randomized_interval(90, 50) for _ in range(100)]
+
+        # All intervals should be >= 60
+        assert all(i >= 60 for i in intervals), f"Some intervals below 60s minimum: {min(intervals)}"
+
+    def test_zero_variance_possible(self):
+        """Test that variance can be disabled by setting to 0"""
+        # All intervals should be exactly 150
+        intervals = [get_randomized_interval(150, 0) for _ in range(20)]
+        assert all(i == 150 for i in intervals), "Variance=0 should produce constant interval"
+
+    def test_interval_distribution(self):
+        """Test that randomization produces reasonable distribution"""
+        # Generate many samples
+        intervals = [get_randomized_interval(150, 30) for _ in range(1000)]
+
+        avg = sum(intervals) / len(intervals)
+
+        # Average should be close to 150 (within 5 seconds)
+        assert 145 <= avg <= 155, f"Average {avg} too far from expected 150"
+
+        # Should have good spread (at least 20 different values)
+        assert len(set(intervals)) >= 20, "Not enough variance in intervals"
+
+    def test_custom_parameters(self):
+        """Test with various custom base intervals and variances"""
+        test_cases = [
+            (120, 20, 100, 140),  # base, variance, min_expected, max_expected
+            (180, 40, 140, 220),
+            (200, 10, 190, 210),
+        ]
+
+        for base, variance, min_exp, max_exp in test_cases:
+            intervals = [get_randomized_interval(base, variance) for _ in range(50)]
+            assert all(min_exp <= i <= max_exp for i in intervals), \
+                f"Failed for base={base}, variance={variance}"