def testGlp(self):
"""Test reading/writing GNU LP format."""
self.lp.write(glp=self.f.name)
lp = LPX(glp=self.f.name)
self.assertEqual(len(lp.rows), 1)
self.assertEqual(len(lp.cols), 2)
self.assertEqual(lp.cols[0].name, 'x')
self.assertEqual(lp.cols[1].name, 'y')
# try to read a non-existing file
with self.assertRaises(RuntimeError) as cm:
lp = LPX(glp='not a real file')
self.assertIn('GLPK LP/MIP reader failed', str(cm.exception))
# try to write to a non-existing path
with self.assertRaises(RuntimeError) as cm:
lp.write(glp='not/a/real/file')
self.assertIn("writer for 'glp' failed to write to 'not/a/real/file'",
str(cm.exception))
def testFreeMps(self):
"""Test reading/writing free MPS format."""
self.lp.write(freemps=self.f.name)
lp = LPX(freemps=self.f.name)
self.assertEqual(len(lp.rows), 1)
self.assertEqual(len(lp.cols), 2)
self.assertEqual(lp.cols[0].name, 'x')
self.assertEqual(lp.cols[1].name, 'y')
# try to read a non-existing file
with self.assertRaises(RuntimeError) as cm:
lp = LPX(freemps='not a real file')
self.assertIn('Free MPS reader failed', str(cm.exception))
# try to write to a non-existing path
with self.assertRaises(RuntimeError) as cm:
lp.write(freemps='not/a/real/file')
self.assertIn(
"writer for 'freemps' failed to write to 'not/a/real/file'",
str(cm.exception))
def testCpxLp(self):
"""Test reading/writing CPLEX LP format."""
self.lp.write(cpxlp=self.f.name)
lp = LPX(cpxlp=self.f.name)
self.assertEqual(len(lp.rows), 1)
self.assertEqual(len(lp.cols), 2)
self.assertEqual(lp.cols[0].name, 'x')
self.assertEqual(lp.cols[1].name, 'y')
# try to read a non-existing file
with self.assertRaises(RuntimeError) as cm:
lp = LPX(cpxlp='not a real file')
self.assertIn('CPLEX LP reader failed', str(cm.exception))
# try to write to a non-existing path
with self.assertRaises(RuntimeError) as cm:
lp.write(cpxlp='not/a/real/file')
self.assertIn(
"writer for 'cpxlp' failed to write to 'not/a/real/file'",
str(cm.exception)
)
def testFreeMps(self):
"""Test reading/writing free MPS format."""
self.lp.write(freemps=self.f.name)
lp = LPX(freemps=self.f.name)
self.assertEqual(len(lp.rows), 1)
self.assertEqual(len(lp.cols), 2)
self.assertEqual(lp.cols[0].name, 'x')
self.assertEqual(lp.cols[1].name, 'y')
# try to read a non-existing file
with self.assertRaises(RuntimeError) as cm:
lp = LPX(freemps='not a real file')
self.assertIn('Free MPS reader failed', str(cm.exception))
# try to write to a non-existing path
with self.assertRaises(RuntimeError) as cm:
lp.write(freemps='not/a/real/file')
self.assertIn(
"writer for 'freemps' failed to write to 'not/a/real/file'",
str(cm.exception)
)
