def test_writer_zero_entries():
out = io.StringIO()
writer = Writer(out)
writer.close()
string = out.getvalue()
assert string == "[]"
def test_writer_one_entry():
out = io.StringIO()
writer = Writer(out)
entry = Entry(name="one")
writer.write(entry)
writer.close()
string = out.getvalue()
assert string == '[{"name":"one"}]'
def test_writer_many_entries():
out = io.StringIO()
writer = Writer(out)
for name in ['one', 'two', 'three']:
entry = Entry(name=name)
writer.write(entry)
writer.close()
string = out.getvalue()
assert string == ('['
'{"name":"one"},'
'{"name":"two"},'
'{"name":"three"}]')