test/test.rb in levenshtein-0.2.0 vs test/test.rb in levenshtein-0.2.1

@@ -10,10 +10,12 @@
     def length
       @sequence.length
     end
  
     def [](pos)
+      raise "type not allowed [#{pos.inspect}]"	unless pos.kind_of?(Fixnum)
+
       @sequence[pos]
     end
   end
   
   class TestElement
@@ -103,23 +105,33 @@
   end
 end
 
 class TestLevenshteinSlow < Test::Unit::TestCase
   def test_erik_veenstra
-    assert_equal(7, Levenshtein.levenshtein_distance_slow("erik", "veenstra", nil))
+    assert_equal(7, Levenshtein.distance_slow("erik", "veenstra", nil))
+    assert_equal(7, Levenshtein.distance_slow("veenstra", "erik", nil))
   end
 
-  def test_empty_sequence
-    assert_equal(0, Levenshtein.levenshtein_distance_slow("", "", nil))
-    assert_equal(3, Levenshtein.levenshtein_distance_slow("", "foo", nil))
+  def test_empty_string
+    assert_equal(0, Levenshtein.distance_slow("", "", nil))
+    assert_equal(3, Levenshtein.distance_slow("", "foo", nil))
+    assert_equal(3, Levenshtein.distance_slow("foo", "", nil))
   end
 
-  def test_same_sequence
-    assert_equal(0, Levenshtein.levenshtein_distance_slow("", "", nil))
-    assert_equal(0, Levenshtein.levenshtein_distance_slow("foo", "foo", nil))
+  def test_same_string
+    assert_equal(0, Levenshtein.distance_slow("", "", nil))
+    assert_equal(0, Levenshtein.distance_slow("foo", "foo", nil))
   end
 
   def test_threshold
-    assert_equal(3, Levenshtein.levenshtein_distance_slow("foo", "foobar", nil))
-    assert_equal(nil, Levenshtein.levenshtein_distance_slow("foo", "foobar", 2))
+    assert_equal(3, Levenshtein.distance_slow("foo", "foobar", nil))
+    assert_equal(3, Levenshtein.distance_slow("foo", "foobar", 4))
+    assert_equal(nil, Levenshtein.distance_slow("foo", "foobar", 2))
+  end
+
+  def test_same_head_and_or_tail
+    assert_equal(3, Levenshtein.distance_slow("ab123cd", "abxyzcd", nil))
+    assert_equal(3, Levenshtein.distance_slow("ab123", "abxyz", nil))
+    assert_equal(3, Levenshtein.distance_slow("123cd", "xyzcd", nil))
+    assert_equal(5, Levenshtein.distance_slow("123cd123", "123", nil))
   end
 end