Pillow/Tests/test_file_container.py

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from .helper import PillowTestCase, hopper
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from PIL import Image
from PIL import ContainerIO
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TEST_FILE = "Tests/images/dummy.container"
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class TestFileContainer(PillowTestCase):
def test_sanity(self):
dir(Image)
dir(ContainerIO)
def test_isatty(self):
im = hopper()
container = ContainerIO.ContainerIO(im, 0, 0)
self.assertFalse(container.isatty())
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def test_seek_mode_0(self):
# Arrange
mode = 0
with open(TEST_FILE) as fh:
container = ContainerIO.ContainerIO(fh, 22, 100)
# Act
container.seek(33, mode)
container.seek(33, mode)
# Assert
self.assertEqual(container.tell(), 33)
def test_seek_mode_1(self):
# Arrange
mode = 1
with open(TEST_FILE) as fh:
container = ContainerIO.ContainerIO(fh, 22, 100)
# Act
container.seek(33, mode)
container.seek(33, mode)
# Assert
self.assertEqual(container.tell(), 66)
def test_seek_mode_2(self):
# Arrange
mode = 2
with open(TEST_FILE) as fh:
container = ContainerIO.ContainerIO(fh, 22, 100)
# Act
container.seek(33, mode)
container.seek(33, mode)
# Assert
self.assertEqual(container.tell(), 100)
def test_read_n0(self):
# Arrange
with open(TEST_FILE) as fh:
container = ContainerIO.ContainerIO(fh, 22, 100)
# Act
container.seek(81)
data = container.read()
# Assert
self.assertEqual(data, "7\nThis is line 8\n")
def test_read_n(self):
# Arrange
with open(TEST_FILE) as fh:
container = ContainerIO.ContainerIO(fh, 22, 100)
# Act
container.seek(81)
data = container.read(3)
# Assert
self.assertEqual(data, "7\nT")
def test_read_eof(self):
# Arrange
with open(TEST_FILE) as fh:
container = ContainerIO.ContainerIO(fh, 22, 100)
# Act
container.seek(100)
data = container.read()
# Assert
self.assertEqual(data, "")
def test_readline(self):
# Arrange
with open(TEST_FILE) as fh:
container = ContainerIO.ContainerIO(fh, 0, 120)
# Act
data = container.readline()
# Assert
self.assertEqual(data, "This is line 1\n")
def test_readlines(self):
# Arrange
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expected = [
"This is line 1\n",
"This is line 2\n",
"This is line 3\n",
"This is line 4\n",
"This is line 5\n",
"This is line 6\n",
"This is line 7\n",
"This is line 8\n",
]
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with open(TEST_FILE) as fh:
container = ContainerIO.ContainerIO(fh, 0, 120)
# Act
data = container.readlines()
# Assert
self.assertEqual(data, expected)