# -*- coding: utf-8 -*-
# <Lettuce - Behaviour Driven Development for python>
# Copyright (C) <2010-2012>  Gabriel Falcão <gabriel@nacaolivre.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

I_LIKE_VEGETABLES = "I hold a special love for green vegetables"
I_HAVE_TASTY_BEVERAGES = """I have the following tasty beverages in my freezer:
   | Name   | Type     | Price |
   | Skol   | Beer     |  3.80 |
   | Nestea | Ice-tea  |  2.10 |
""".strip()
I_DIE_HAPPY = "I shall die with love in my heart"

BACKGROUND_WITH_TAGGED_SCENARIO = '''
    Background:
        background line 1
        
    @wip
    Scenario:
        Scenario line 1
'''

MULTI_LINE = '''
I have a string like so:
  """
  This is line one
  and this is line two
  and this is line three
    and this is line four,

    with spaces at the beginning
  """
'''.strip()

MULTI_LINE_WHITESPACE = '''
I have a string like so:
  """
  This is line one
  and this is line two
  and this is line three
 "  and this is line four,
 "
 "  with spaces at the beginning
  and spaces at the end   "
  """
'''.strip()


INVALID_MULTI_LINE = '''
  """
  invalid one...
  """
'''.strip()

import string
from lettuce.core import Step
from lettuce.exceptions import LettuceSyntaxError
from lettuce import strings
from nose.tools import assert_equals
from tests.asserts import *


def test_step_has_repr():
    "Step implements __repr__ nicely"
    step = Step.from_string(I_HAVE_TASTY_BEVERAGES)
    assert_equals(
        repr(step),
        '<Step: "' + string.split(I_HAVE_TASTY_BEVERAGES, '\n')[0] + '">'
    )

def test_can_get_sentence_from_string():
    "It should extract the sentence string from the whole step"

    step = Step.from_string(I_HAVE_TASTY_BEVERAGES)

    assert isinstance(step, Step)

    assert_equals(
        step.sentence,
        string.split(I_HAVE_TASTY_BEVERAGES, '\n')[0]
    )

def test_can_parse_keys_from_table():
    "It should take the keys from the step, if it has a table"

    step = Step.from_string(I_HAVE_TASTY_BEVERAGES)
    assert_equals(step.keys, ('Name', 'Type', 'Price'))

def test_can_parse_tables():
    "It should have a list of data from a given step, if it has a table"

    step = Step.from_string(I_HAVE_TASTY_BEVERAGES)

    assert isinstance(step.hashes, list)
    assert_equals(len(step.hashes), 2)
    assert_equals(
        step.hashes[0],
        {
            'Name': 'Skol',
            'Type': 'Beer',
            'Price': '3.80'
        }
    )
    assert_equals(
        step.hashes[1],
        {
            'Name': 'Nestea',
            'Type': 'Ice-tea',
            'Price': '2.10'
        }
    )

def test_can_parse_a_unary_array_from_single_step():
    "It should extract a single ordinary step correctly into an array of steps"

    steps = Step.many_from_lines(I_HAVE_TASTY_BEVERAGES.splitlines())
    assert_equals(len(steps), 1)
    assert isinstance(steps[0], Step)
    assert_equals(steps[0].sentence, string.split(I_HAVE_TASTY_BEVERAGES, '\n')[0])

def test_can_parse_a_unary_array_from_complicated_step():
    "It should extract a single tabular step correctly into an array of steps"
    steps = Step.many_from_lines(I_LIKE_VEGETABLES.splitlines())
    assert_equals(len(steps), 1)
    assert isinstance(steps[0], Step)
    assert_equals(steps[0].sentence, I_LIKE_VEGETABLES)

def test_can_parse_regular_step_followed_by_tabular_step():
    "It should correctly extract two steps (one regular, one tabular) into an array."
    steps = Step.many_from_lines(I_LIKE_VEGETABLES.splitlines() +  I_HAVE_TASTY_BEVERAGES.splitlines())
    assert_equals(len(steps), 2)
    assert isinstance(steps[0], Step)
    assert isinstance(steps[1], Step)
    assert_equals(steps[0].sentence, I_LIKE_VEGETABLES)
    assert_equals(steps[1].sentence, string.split(I_HAVE_TASTY_BEVERAGES, '\n')[0])

def test_can_parse_tabular_step_followed_by_regular_step():
    "It should correctly extract two steps (one tabular, one regular) into an array."
    steps = Step.many_from_lines(I_HAVE_TASTY_BEVERAGES.splitlines() + I_LIKE_VEGETABLES.splitlines())
    assert_equals(len(steps), 2)
    assert isinstance(steps[0], Step)
    assert isinstance(steps[1], Step)
    assert_equals(steps[0].sentence, string.split(I_HAVE_TASTY_BEVERAGES, '\n')[0])
    assert_equals(steps[1].sentence, I_LIKE_VEGETABLES)

def test_can_parse_two_ordinary_steps():
    "It should correctly extract two ordinary steps into an array."
    steps = Step.many_from_lines(I_DIE_HAPPY.splitlines() + I_LIKE_VEGETABLES.splitlines())
    assert_equals(len(steps), 2)
    assert isinstance(steps[0], Step)
    assert isinstance(steps[1], Step)
    assert_equals(steps[0].sentence, I_DIE_HAPPY)
    assert_equals(steps[1].sentence, I_LIKE_VEGETABLES)

def test_can_parse_background_and_ignore_tag():
    "It should correctly parse and ignore tags between the background and first step."
    steps = Step.many_from_lines(BACKGROUND_WITH_TAGGED_SCENARIO.splitlines())
    steps_without_tags = filter(lambda x: not x.sentence == '@wip', steps)
    assert_equals(len(steps), len(steps_without_tags))

def test_cannot_start_with_multiline():
    "It should raise an error when a step starts with a multiline string"
    lines = strings.get_stripped_lines(INVALID_MULTI_LINE)
    try:
        step = Step.many_from_lines(lines)
    except LettuceSyntaxError:
        return
    assert False, "LettuceSyntaxError not raised"

def test_multiline_is_part_of_previous_step():
    "It should correctly parse a multi-line string as part of the preceding step"
    lines = strings.get_stripped_lines(MULTI_LINE)
    steps = Step.many_from_lines(lines)
    print steps
    assert_equals(len(steps), 1)
    assert isinstance(steps[0], Step)
    assert_equals(steps[0].sentence, 'I have a string like so:')

def test_multiline_is_parsed():
    step = Step.from_string(MULTI_LINE)
    assert_equals(step.sentence, 'I have a string like so:')
    assert_equals(step.multiline, u"""This is line one
and this is line two
and this is line three
and this is line four,
with spaces at the beginning""")


def test_multiline_with_whitespace():
    step = Step.from_string(MULTI_LINE_WHITESPACE)
    assert_equals(step.sentence, 'I have a string like so:')
    assert_equals(step.multiline, u"""This is line one
and this is line two
and this is line three
  and this is line four,

  with spaces at the beginning
and spaces at the end   """)

def test_handy_attribute_for_first_occurrence_of_hashes():
    'Step.hashes objects should have a ".first" attribute that gives the first row (dict) of the "hashes" list'

    step = Step.from_string(I_HAVE_TASTY_BEVERAGES)
    assert_equals(
        step.hashes.first,
        {'Name': 'Skol', 'Type': 'Beer', 'Price': '3.80'}
    )

def test_hashes__first_attr_raises_assertion_error_if_empty():
    'Step().hashes.first should raise a assertion error if the list is empty'

    step = Step.from_string(I_DIE_HAPPY)

    try:
        step.hashes.first
        failed = False
    except AssertionError, e:
        failed = True
        assert_equals(
            unicode(e),
            'The step "%s" have no table defined, so that you can\'t use step.hashes.first' % I_DIE_HAPPY
        )


    assert failed, 'it should fail'

def test_handy_attribute_for_last_occurrence_of_hashes():
    'Step.hashes objects should have a ".last" attribute that gives the last row (dict) of the "hashes" list'

    step = Step.from_string(I_HAVE_TASTY_BEVERAGES)
    assert_equals(
        step.hashes.last,
        {'Name': 'Nestea', 'Type': 'Ice-tea', 'Price': '2.10'}
    )

def test_hashes__last_attr_raises_assertion_error_if_empty():
    'Step().hashes.last should raise a assertion error if the list is empty'

    step = Step.from_string(I_DIE_HAPPY)

    try:
        step.hashes.last
        failed = False
    except AssertionError, e:
        failed = True
        assert_equals(
            unicode(e),
            'The step "%s" have no table defined, so that you can\'t use step.hashes.last' % I_DIE_HAPPY
        )


    assert failed, 'it should fail'

def test_handy_function_for_table_members():
    'Step.hashes.values_under should be a method that gives a list of members'

    step = Step.from_string(I_HAVE_TASTY_BEVERAGES)
    assert_equals(step.hashes.values_under('Name'), ['Skol', 'Nestea'])

def test_handy_function_for_table_members_fail_giving_assertionerror():
    'Step.hashes.values_under raises AssertionError if the key does not exist'

    step = Step.from_string(I_HAVE_TASTY_BEVERAGES)
    try:
        step.hashes.values_under('Foobar')
        failed = False
    except AssertionError, e:
        failed = True
        assert_equals(
            unicode(e),
            'The step "I have the following tasty beverages in my freezer:" ' \
            'have no table column with the key "Foobar". ' \
            'Could you check your step definition for that ? ' \
            'Maybe there is a typo :)'
        )


    assert failed, 'it should fail'



