@@ -50,6 +50,32 @@ def test_LogLocator():
5050 test_value = np .array ([0.5 , 1. , 2. , 4. , 8. , 16. , 32. , 64. , 128. , 256. ])
5151 assert_almost_equal (loc .tick_values (1 , 100 ), test_value )
5252
53+ def test_LogFormatterExponent ():
54+ class FakeAxis (object ):
55+ """Allow Formatter to be called without having a "full" plot set up."""
56+ def get_view_interval (self ):
57+ return 1 , 10
58+
59+ i = np .arange (- 3 , 4 , dtype = float )
60+ expected_result = ['-3' , '-2' , '-1' , '0' , '1' , '2' , '3' ]
61+ for base in [2 , 5 , 10 , np .pi ]:
62+ formatter = mticker .LogFormatterExponent (base = base )
63+ formatter .axis = FakeAxis ()
64+ vals = base ** i
65+ labels = [formatter (x , pos ) for (x , pos ) in zip (vals , i )]
66+ nose .tools .assert_equal (labels , expected_result )
67+
68+ # Should be a blank string for non-integer powers if labelOnlyBase=True
69+ formatter = mticker .LogFormatterExponent (base = 10 , labelOnlyBase = True )
70+ formatter .axis = FakeAxis ()
71+ nose .tools .assert_equal (formatter (10 ** 0.1 ), '' )
72+
73+ # Otherwise, non-integer powers should be nicely formatted
74+ formatter = mticker .LogFormatterExponent (base = 10 , labelOnlyBase = False )
75+ formatter .axis = FakeAxis ()
76+ nose .tools .assert_equal (formatter (10 ** 0.1 ), '0.1' )
77+ nose .tools .assert_equal (formatter (10 ** 0.00001 ), '1e-05' )
78+ nose .tools .assert_equal (formatter (10 ** - 0.2 ), '-0.2' )
5379
5480def test_use_offset ():
5581 for use_offset in [True , False ]:
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