def test_creation_01(self):
sj = StringJoiner()
expected__str__ = ''
self.assertEqual(expected__str__, str(sj))
expected__repr__ = '{"separator": ",", "prefix": "", "suffix": "", ' \
'"nelem": 0, "str_length": 0, "elements": []}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_adding_01(self):
sj = StringJoiner()
sj.add("e1")
self.assertEqual("e1", str(sj))
expected__repr__ = '{"separator": ",", "prefix": "", "suffix": "", ' \
'"nelem": 1, "str_length": 2, "elements": ["e1"]}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_merge_03(self):
sj = StringJoiner(prefix="[", suffix="]")
sj.merge([1, 2, 3, "str", 4.0, ","])
self.assertEqual("[1,2,3,str,4.0,,]", str(sj))
expected__repr__ = '{"separator": ",", "prefix": "[", "suffix": "]", ' \
'"nelem": 6, "str_length": 17, "elements": ["1", "2", "3", "str", "4.0", ","]}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_adding_04(self):
sj = StringJoiner(prefix="[", suffix="]")
sj.add("e1").add("e2").add(3)
sj.add("e0", 0)
self.assertEqual("[e0,e1,e2,3]", str(sj))
expected__repr__ = '{"separator": ",", "prefix": "[", "suffix": "]", ' \
'"nelem": 4, "str_length": 12, "elements": ["e0", "e1", "e2", "3"]}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_adding_02(self):
sj = StringJoiner()
sj.add("e1").add("e2")
self.assertEqual("e1,e2", str(sj))
print("Sample Default String Joiner Output:", sj)
expected__repr__ = '{"separator": ",", "prefix": "", "suffix": "", ' \
'"nelem": 2, "str_length": 5, "elements": ["e1", "e2"]}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_delete_item_02(self):
sj = StringJoiner(prefix="[", suffix="]")
sj.add("e1").add("e2").add(3)
del sj[-3]
self.assertEqual("[e2,3]", str(sj))
expected__repr__ = '{"separator": ",", "prefix": "[", "suffix": "]", ' \
'"nelem": 2, "str_length": 6, "elements": ["e2", "3"]}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_set_item_04(self):
sj = StringJoiner(prefix="[", suffix="]")
sj.add("e1").add("e2").add(3)
sj[0] = "e11"
self.assertEqual("[e11,e2,3]", str(sj))
expected__repr__ = '{"separator": ",", "prefix": "[", "suffix": "]", ' \
'"nelem": 3, "str_length": 10, "elements": ["e11", "e2", "3"]}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_removing_01(self):
sj = StringJoiner(prefix="[", suffix="]")
sj.add("e1").add("e2").add(3)
sj.remove("e2")
self.assertEqual("[e1,3]", str(sj))
expected__repr__ = '{"separator": ",", "prefix": "[", "suffix": "]", ' \
'"nelem": 2, "str_length": 6, "elements": ["e1", "3"]}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_adding_03(self):
sj = StringJoiner(prefix="[", suffix="]")
sj.add("e1").add("e2").add(3)
self.assertEqual("[e1,e2,3]", str(sj))
print(
"Sample String Joiner Output (default separator, prefix = [, suffix = ]:",
sj)
expected__repr__ = '{"separator": ",", "prefix": "[", "suffix": "]", ' \
'"nelem": 3, "str_length": 9, "elements": ["e1", "e2", "3"]}'
self.assertEqual(expected__repr__, sj.__repr__())
def test_merge_02(self):
sj1 = StringJoiner(prefix="[", suffix="]")
sj1.add("e1").add("e2").add(3)
sj2 = StringJoiner(prefix="(", suffix=")")
sj2.add("o1").add("o2")
sj2.merge(sj1, 1)
self.assertEqual("(o1,e1,e2,3,o2)", str(sj2))
expected__repr__ = '{"separator": ",", "prefix": "(", "suffix": ")", ' \
'"nelem": 5, "str_length": 15, "elements": ["o1", "e1", "e2", "3", "o2"]}'
self.assertEqual(expected__repr__, sj2.__repr__())
def test_set_item_05(self):
sj = StringJoiner(prefix="[", suffix="]")
sj.add("e1").add("e2").add(3)
with self.assertRaises(IndexError):
sj[-42] = "something"
sj[-3] = "e11"
self.assertEqual("[e11,e2,3]", str(sj))
expected__repr__ = '{"separator": ",", "prefix": "[", "suffix": "]", ' \
'"nelem": 3, "str_length": 10, "elements": ["e11", "e2", "3"]}'
self.assertEqual(expected__repr__, sj.__repr__())
with self.assertRaises(IndexError):
sj[42] = "something"