Example #1
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def test_to_maybe():
    assert_equals(maybe.Just(42), validation.Valid(42).to_maybe())
    assert_equals(maybe.Nothing(), validation.Invalid(['nope']).to_maybe())
Example #2
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def test_to_validation():
  assert_equals(validation.Valid(42), maybe.Just(42).to_validation('nope'))
  assert_equals(validation.Invalid(['nope']), maybe.Nothing().to_validation('nope'))
Example #3
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 def k(y):
     if (x == 0):
         return maybe.Nothing()
     else:
         return maybe.Just(y / x)
Example #4
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def test_maybe():
  assert_true(maybe.maybe(None).__eq__(maybe.Nothing()))
  assert_true(maybe.maybe(42).__eq__(maybe.Just(42)))
Example #5
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def test_or_else():
  assert_true(maybe.Just(42).__eq__(maybe.Just(42).or_else(maybe.Just(1))))
  assert_true(maybe.Just(1).__eq__(maybe.Nothing().or_else(maybe.Just(1))))
Example #6
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def test_get_or_else():
  assert_equals(42, maybe.Just(42).get_or_else(1))
  assert_equals(1, maybe.Nothing().get_or_else(1))
Example #7
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def test_parse_int():
  assert_equals(maybe.Just(42), maybe.parse_int('42'))
  assert_equals(maybe.Nothing(), maybe.parse_int('forty-two'))
Example #8
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def test_flat_map():
  assert_equals(maybe.Just(6), maybe.Just(42).flat_map(divBy(7)))
  assert_equals(maybe.Nothing(), maybe.Nothing().flat_map(divBy(7)))
Example #9
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def test_map():
  assert_equals(maybe.Just(42), maybe.Just(6).map(multBy(7)))
  assert_equals(maybe.Nothing(), maybe.Nothing().map(multBy(7)))
Example #10
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def test_is_just():
  assert_true(maybe.Just(42).is_just())
  assert_false(maybe.Nothing().is_just())
Example #11
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def test_str():
  assert_equals('Just(42)', str(maybe.Just(42)))
  assert_equals('Nothing()', str(maybe.Nothing()))
Example #12
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def test_ne():
  assert_false(maybe.Just(42).__ne__(maybe.Just(42)))
  assert_true(maybe.Just(42).__ne__(maybe.Just(1)))
  assert_false(maybe.Nothing().__ne__(maybe.Nothing()))
  assert_true(maybe.Just(42).__ne__(maybe.Nothing()))