update sampler tests

Author: Valery Chernov

serve/tests/unittest/test_sampler.py

@@ -14,7 +14,9 @@ def get_sampling_state(sampling_params, past_output_tokens=None, prompt_masks=No
     if past_output_tokens is None:
         past_output_tokens = [[] for _ in range(batch_size)]
     if prompt_masks is None:
-        prompt_masks = [[] for _ in range(batch_size)]
+        # Prepare empty prompt mask
+        prompt_mask = torch.zeros((vocab_size,), dtype=torch.bool)
+        prompt_masks = [prompt_mask] * batch_size
     _copy_stream: torch.cuda.Stream = torch.cuda.Stream()
     with torch.cuda.stream(_copy_stream):
         sampling_state = SamplingState.from_sampling_params(
@@ -29,7 +31,7 @@ def get_sampling_state(sampling_params, past_output_tokens=None, prompt_masks=No
     return sampling_state
 
 
-def _test_temperature(temp=0, batch_size=1):
+def test_temperature(temp=0, batch_size=1):
     shape = (batch_size, vocab_size)
     logits = torch.rand(shape, dtype=dtype, device=dev)
     sampling_param = SamplingParams(temperature=temp)
@@ -41,7 +43,7 @@ def _test_temperature(temp=0, batch_size=1):
     assert torch.allclose(expected, new_logits)
 
 
-def _test_logit_bias_checker():
+def test_logit_bias_checker():
     # logit bias must be [-100, 100]
     with pytest.raises(ValueError):
         logit_bias = {1: 2, 3: 105, 2: 2}
@@ -78,7 +80,7 @@ def _test_logit_bias_checker():
         get_sampling_state([sampling_param])
 
 
-def _test_logit_bias():
+def test_logit_bias():
     # test single batch
     batch_size = 1
     shape = (batch_size, vocab_size)
@@ -112,7 +114,7 @@ def _test_logit_bias():
     assert torch.allclose(expected, new_logits)
 
 
-def _test_penalties_checker():
+def test_penalties_checker():
     get_sampling_state([SamplingParams(presence_penalty=-1.0)])
     get_sampling_state([SamplingParams(frequency_penalty=-1.0)])
     get_sampling_state([SamplingParams(repetition_penalty=0.7)])
@@ -143,15 +145,16 @@ def _test_penalties_checker():
         )
 
 
-def _test_penalties():
+def test_penalties():
     # TODO(vvchernov): Add test for repetition penalty
     batch_size = 1
     shape = (batch_size, vocab_size)
     logits = torch.rand(shape, dtype=dtype, device=dev)
     presence_penalties = [0.8]
     frequency_penalties = [0.3]
     past_output_tokens = [[2, 2, 2, 3]]
-    prompt_masks = [[False] * vocab_size] * batch_size
+    prompt_mask = torch.zeros((vocab_size,), dtype=torch.bool)
+    prompt_masks = [prompt_mask] * batch_size
 
     def prepare_metadata(past_output_tokens):
         count_map = []
@@ -202,7 +205,8 @@ def get_expected_result(
     presence_penalties = [0.8, 0.7, -0.8]
     frequency_penalties = [-0.3, 2.0, 1.2]
     past_output_tokens = [[2, 2, 2, 3, 5], [3, 1, 2, 4], [3, 3, 1]]
-    prompt_masks = [[False] * vocab_size] * batch_size
+    prompt_mask = torch.zeros((vocab_size,), dtype=torch.bool)
+    prompt_masks = [prompt_mask] * batch_size
 
     count_map, mask = prepare_metadata(past_output_tokens)
     expected = get_expected_result(
@@ -225,7 +229,7 @@ def get_expected_result(
     assert torch.allclose(expected, new_logits)
 
 
-def _test_top_p_top_k_checker():
+def test_top_p_top_k_checker():
     get_sampling_state([SamplingParams(top_p=0.8)])
     get_sampling_state([SamplingParams(top_k=3)])
 
@@ -248,7 +252,7 @@ def _test_top_p_top_k_checker():
         get_sampling_state([SamplingParams(top_k=-2)])
 
 
-def _test_top_p_top_k():
+def test_top_p_top_k():
     def get_expected_result(logits, top_pks, filter_value=-float("Inf")):
         """Filter a distribution of logits using top-k and/or nucleus (top-p) filtering
         Args:
@@ -320,7 +324,7 @@ def get_expected_result(logits, top_pks, filter_value=-float("Inf")):
     assert torch.allclose(expected, new_logits)
 
 
-def _test_mixture_of_requests():
+def test_mixture_of_requests():
     # Mixed greedy & top_p/top_ks
     batch_size = 6
     shape = (batch_size, vocab_size)
@@ -341,11 +345,11 @@ def _test_mixture_of_requests():
 
 
 if __name__ == "__main__":
-    _test_temperature()
-    _test_logit_bias_checker()
-    _test_logit_bias()
-    _test_penalties_checker()
-    _test_penalties()
-    _test_top_p_top_k_checker()
-    _test_top_p_top_k()
-    _test_mixture_of_requests()
+    test_temperature()
+    test_logit_bias_checker()
+    test_logit_bias()
+    test_penalties_checker()
+    test_penalties()
+    test_top_p_top_k_checker()
+    test_top_p_top_k()
+    test_mixture_of_requests()