test: add -> None return type annotations to all test methods

shellhist/tests/test_patterns.py

@@ -14,14 +14,14 @@ from shellhist.core.patterns import (
 class TestNgramAnalysis:
     """Test n-gram analysis functionality."""
 
-    def test_empty_store(self):
+    def test_empty_store(self) -> None:
         """Test with empty store."""
         store = HistoryStore()
         results = ngram_analysis(store, n=2)
         
         assert len(results) == 0
 
-    def test_simple_pairs(self):
+    def test_simple_pairs(self) -> None:
         """Test detecting command pairs."""
         store = HistoryStore()
         
@@ -41,7 +41,7 @@ class TestNgramAnalysis:
         pair = results[0]
         assert "git status -> git log" in " -> ".join(pair.commands)
 
-    def test_triplets(self):
+    def test_triplets(self) -> None:
         """Test detecting command triplets."""
         store = HistoryStore()
         
@@ -62,7 +62,7 @@ class TestNgramAnalysis:
         assert len(results) == 1
         assert results[0].frequency == 2
 
-    def test_min_frequency_filter(self):
+    def test_min_frequency_filter(self) -> None:
         """Test minimum frequency filtering."""
         store = HistoryStore()
         
@@ -83,7 +83,7 @@ class TestNgramAnalysis:
 class TestDetectRepetitiveCommands:
     """Test repetitive command detection."""
 
-    def test_detect_repetitive(self):
+    def test_detect_repetitive(self) -> None:
         """Test detecting repetitive single commands."""
         store = HistoryStore()
         
@@ -99,7 +99,7 @@ class TestDetectRepetitiveCommands:
         assert results[0].commands == ("git status",)
         assert results[0].frequency == 5
 
-    def test_no_repetitive_commands(self):
+    def test_no_repetitive_commands(self) -> None:
         """Test when no commands are repetitive."""
         store = HistoryStore()
         
@@ -114,7 +114,7 @@ class TestDetectRepetitiveCommands:
 class TestDetectCommandPairs:
     """Test command pair detection."""
 
-    def test_detect_pairs(self):
+    def test_detect_pairs(self) -> None:
         """Test detecting command pairs."""
         store = HistoryStore()
         
@@ -136,7 +136,7 @@ class TestDetectCommandPairs:
 class TestDetectCommandTriplets:
     """Test command triplet detection."""
 
-    def test_detect_triplets(self):
+    def test_detect_triplets(self) -> None:
         """Test detecting command triplets."""
         store = HistoryStore()
         
@@ -161,7 +161,7 @@ class TestDetectCommandTriplets:
 class TestDetectCommonSequences:
     """Test common sequence detection."""
 
-    def test_detect_sequences_various_lengths(self):
+    def test_detect_sequences_various_lengths(self) -> None:
         """Test detecting sequences of various lengths."""
         store = HistoryStore()