def test_read_text_header(mmap=False):
f = _segyio.segyiofd("test-data/small.sgy", "r")
if mmap:
f.mmap()
lines = {
1: "DATE: 2016-09-19",
2: "AN INCREASE IN AMPLITUDE EQUALS AN INCREASE IN ACOUSTIC IMPEDANCE",
3: "Written by libsegyio (python)",
11: "TRACE HEADER POSITION:",
12: " INLINE BYTES 189-193 | OFFSET BYTES 037-041",
13: " CROSSLINE BYTES 193-197 |",
15: "END EBCDIC HEADER"
}
rows = segyio.create_text_header(lines)
rows = bytearray(rows, 'ascii') # mutable array of bytes
rows[-1] = 128 # \x80
actual_text_header = bytes(rows)
assert f.gettext(0) == actual_text_header
with pytest.raises(Exception):
_segyio.read_texthdr(None, 0)
f.close()
def test_read_text_header(self):
f = _segyio.open(self.filename, "r")
self.assertEqual(_segyio.read_textheader(f, 0), ACTUAL_TEXT_HEADER)
with self.assertRaises(Exception):
_segyio.read_texthdr(None, 0)
_segyio.close(f)
def test_read_text_header(self, mmap=False):
f = _segyio.segyiofd(self.filename, "r")
if mmap: f.mmap()
self.assertEqual(f.gettext(0), self.ACTUAL_TEXT_HEADER)
with self.assertRaises(Exception):
_segyio.read_texthdr(None, 0)
f.close()
