def test_readline_remove_history_item(base_app):
from cmd2.rl_utils import readline
assert readline.get_current_history_length() == 0
readline.add_history('this is a test')
assert readline.get_current_history_length() == 1
readline.remove_history_item(0)
assert readline.get_current_history_length() == 0
def test_history_populates_readline(hist_file):
# - create a cmd2 with persistent history
app = cmd2.Cmd(persistent_history_file=hist_file)
run_cmd(app, 'help')
run_cmd(app, 'shortcuts')
run_cmd(app, 'shortcuts')
run_cmd(app, 'alias')
# call the private method which is registered to write history at exit
app._persist_history()
# see if history came back
app = cmd2.Cmd(persistent_history_file=hist_file)
assert len(app.history) == 4
assert app.history.get(1).statement.raw == 'help'
assert app.history.get(2).statement.raw == 'shortcuts'
assert app.history.get(3).statement.raw == 'shortcuts'
assert app.history.get(4).statement.raw == 'alias'
# readline only adds a single entry for multiple sequential identical commands
# so we check to make sure that cmd2 populated the readline history
# using the same rules
from cmd2.rl_utils import readline
assert readline.get_current_history_length() == 3
assert readline.get_history_item(1) == 'help'
assert readline.get_history_item(2) == 'shortcuts'
assert readline.get_history_item(3) == 'alias'
