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# Copyright 2018 The pybadge Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tests for PrecalculatedTextMeasurer."""
import unittest
from pybadges import precalculated_text_measurer
class TestPrecalculatedTextMeasurer(unittest.TestCase):
def test_some_known_widths(self):
measurer = precalculated_text_measurer.PrecalculatedTextMeasurer(
default_character_width=5.1,
char_to_width={
'H': 1.2,
'l': 1.3
},
pair_to_kern={})
text_width = measurer.text_width('Hello')
self.assertAlmostEqual(text_width, 1.2 + 5.1 + 1.3 + 1.3 + 5.1)
def test_kern_in_middle(self):
measurer = precalculated_text_measurer.PrecalculatedTextMeasurer(
default_character_width=5,
char_to_width={},
pair_to_kern={
'el': 3.3,
'll': 4.4,
'no': 5.5
})
text_width = measurer.text_width('Hello')
self.assertAlmostEqual(text_width, 5 * 5 - 3.3 - 4.4)
def test_kern_at_start(self):
measurer = precalculated_text_measurer.PrecalculatedTextMeasurer(
default_character_width=5,
char_to_width={},
pair_to_kern={
'He': 3.3,
'no': 4.4
})
text_width = measurer.text_width('Hello')
self.assertAlmostEqual(text_width, 5 * 5 - 3.3)
def test_kern_at_end(self):
measurer = precalculated_text_measurer.PrecalculatedTextMeasurer(
default_character_width=5,
char_to_width={},
pair_to_kern={
'lo': 3.3,
'no': 4.4
})
text_width = measurer.text_width('Hello')
self.assertAlmostEqual(text_width, 5 * 5 - 3.3)
def test_default_usable(self):
measurer = (
precalculated_text_measurer.PrecalculatedTextMeasurer.default())
measurer.text_width('This is a long string of text')
if __name__ == '__main__':
unittest.main()
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