Initial commit of LLM speed test app

tests/test_stats.py

@@ -0,0 +1,76 @@
+"""统计模块测试"""
+import math
+
+from backend.stats import mean, std, percentile, percentiles, min_val, max_val
+
+
+class TestMean:
+    def test_normal(self):
+        assert mean([1, 2, 3, 4, 5]) == 3.0
+
+    def test_single(self):
+        assert mean([42]) == 42.0
+
+    def test_empty(self):
+        assert mean([]) == 0.0
+
+    def test_floats(self):
+        assert abs(mean([1.5, 2.5, 3.5]) - 2.5) < 1e-9
+
+
+class TestStd:
+    def test_known_std(self):
+        data = [2, 4, 4, 4, 5, 5, 7, 9]
+        assert abs(std(data) - 2.13809) < 1e-4
+
+    def test_single(self):
+        assert std([42]) == 0.0
+
+    def test_two_values(self):
+        assert std([0, 2]) == math.sqrt(2)
+
+    def test_empty(self):
+        assert std([]) == 0.0
+
+
+class TestPercentile:
+    def test_median(self):
+        assert percentile([1, 2, 3, 4, 5], 50) == 3.0
+
+    def test_p0(self):
+        assert percentile([1, 2, 3, 4, 5], 0) == 1.0
+
+    def test_p100(self):
+        assert percentile([1, 2, 3, 4, 5], 100) == 5.0
+
+    def test_empty(self):
+        assert percentile([], 50) == 0.0
+
+    def test_interpolation(self):
+        assert percentile([1, 2], 50) == 1.5
+
+
+class TestPercentiles:
+    def test_batch(self):
+        result = percentiles([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], [25, 50, 75])
+        assert result[50] == 5.5
+        assert result[25] > 0
+        assert result[75] > result[50]
+
+    def test_empty(self):
+        result = percentiles([], [50])
+        assert result[50] == 0.0
+
+
+class TestMinMax:
+    def test_min(self):
+        assert min_val([3, 1, 2]) == 1
+
+    def test_max(self):
+        assert max_val([3, 1, 2]) == 3
+
+    def test_min_empty(self):
+        assert min_val([]) == 0.0
+
+    def test_max_empty(self):
+        assert max_val([]) == 0.0