def test_basics_in_memory():
G = LineFileInMemory("tests/smallcorpus.txt.bz2", header="foo bar baz qux",
path="tests/tmp/testcorpus")
assert_equal(G.header, "foo bar baz qux".split())
assert_equal(G.files, ["tests/smallcorpus.txt.bz2"])
G.make_column("quux", lambda x, y, z, w: "cat", "foo bar baz qux")
assert_equal(G.header, "foo bar baz qux quux".split())
for line in G.lines(parts=False):
assert_equal(G.extract_columns(line, "quux"), ["cat"])
G.delete_columns("quux")
assert_equal(G.header, "foo bar baz qux".split())
G.copy_column("quux", "qux")
assert_equal(G.header, "foo bar baz qux quux".split())
for line in G.lines(parts=False):
assert_equal(G.extract_columns(line, "qux"),
G.extract_columns(line, "quux")
)
