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#!/usr/bin/env python

# -*- coding: utf-8 -*-

from runner.koan import *

class AboutStrings(Koan):

def test_double_quoted_strings_are_strings(self):

string = "Hello, world."

self.assertEqual(__, isinstance(string, str))

def test_single_quoted_strings_are_also_strings(self):

string = 'Goodbye, world.'

self.assertEqual(__, isinstance(string, str))

def test_triple_quote_strings_are_also_strings(self):

string = """Howdy, world!"""

self.assertEqual(__, isinstance(string, str))

def test_triple_single_quotes_work_too(self):

string = '''Bonjour tout le monde!'''

self.assertEqual(__, isinstance(string, str))

def test_raw_strings_are_also_strings(self):

string = r"Konnichi wa, world!"

self.assertEqual(__, isinstance(string, str))

def test_use_single_quotes_to_create_string_with_double_quotes(self):

string = 'He said, "Go Away."'

self.assertEqual(__, string)

def test_use_double_quotes_to_create_strings_with_single_quotes(self):

string = "Don't"

self.assertEqual(__, string)

def test_use_backslash_for_escaping_quotes_in_strings(self):

a = "He said, \"Don't\""

b = 'He said, "Don\'t"'

self.assertEqual(__, (a == b))

def test_use_backslash_at_the_end_of_a_line_to_continue_onto_the_next_line(self):

string = "It was the best of times,\n\

It was the worst of times."

self.assertEqual(__, len(string))

def test_triple_quoted_strings_can_span_lines(self):

string = """

Howdy,

world!

"""

self.assertEqual(__, len(string))

def test_triple_quoted_strings_need_less_escaping(self):

a = "Hello \"world\"."

b = """Hello "world"."""

self.assertEqual(__, (a == b))

def test_escaping_quotes_at_the_end_of_triple_quoted_string(self):

string = """Hello "world\""""

self.assertEqual(__, string)

def test_plus_concatenates_strings(self):

string = "Hello, " + "world"

self.assertEqual(__, string)

def test_adjacent_strings_are_concatenated_automatically(self):

string = "Hello" ", " "world"

self.assertEqual(__, string)

def test_plus_will_not_modify_original_strings(self):

hi = "Hello, "

there = "world"

string = hi + there

self.assertEqual(__, hi)

self.assertEqual(__, there)

def test_plus_equals_will_append_to_end_of_string(self):

hi = "Hello, "

there = "world"

hi += there

self.assertEqual(__, hi)

def test_plus_equals_also_leaves_original_string_unmodified(self):

original = "Hello, "

hi = original

there = "world"

hi += there

self.assertEqual(__, original)

def test_most_strings_interpret_escape_characters(self):

string = "\n"

self.assertEqual('\n', string)

self.assertEqual("""\n""", string)

self.assertEqual(__, len(string))