import pytest

from marshmallow import validate, ValidationError

def test_invalid_email():
    invalid1 = "user@example"
    with pytest.raises(ValidationError):
        validate.email(invalid1)
    invalid2 = "example.com"
    with pytest.raises(ValidationError):
        validate.email(invalid2)
    invalid3 = "user"
    with pytest.raises(ValidationError):
        validate.email(invalid3)
    with pytest.raises(ValidationError):
        validate.email('@nouser.com')

def test_validate_email_none():
    assert validate.email(None) is None

def test_validate_url_none():
    assert validate.url(None) is None

import pytest

from marshmallow import validate, ValidationError

def test_invalid_email():
    invalid1 = "user@example"
    with pytest.raises(ValidationError):
        validate.email(invalid1)
    invalid2 = "example.com"
    with pytest.raises(ValidationError):
        validate.email(invalid2)
    invalid3 = "user"
    with pytest.raises(ValidationError):
        validate.email(invalid3)
    with pytest.raises(ValidationError):
        validate.email('@nouser.com')

def test_validate_email_none():
    assert validate.email(None) is None

def test_validate_url_none():
    assert validate.url(None) is None

def test_min_length():
    with pytest.raises(ValidationError):
        validate.length('foo', 4, 5)
    assert validate.length('foo', 3, 5) == 'foo'
    with pytest.raises(ValidationError):
        validate.length([1, 2, 3], 4, 5)
    assert validate.length([1, 2, 3], 3, 5) == [1, 2, 3]
    with pytest.raises(ValidationError):
        validate.length('foo', 5)

def test_max_length():
    with pytest.raises(ValidationError):
        validate.length('foo', 1, 2)
    assert validate.length('foo', 1, 3) == 'foo'
    with pytest.raises(ValidationError):
        validate.length([1, 2, 3], 1, 2)
    assert validate.length([1, 2, 3], 1, 3) == [1, 2, 3]
    with pytest.raises(ValidationError):
        validate.length('foo', None, 2)

def test_validate_length_none():
    assert validate.length(None) is None

Add length validator unit tests
Add length validator unit tests
  import pytest
  
  from marshmallow import validate, ValidationError
  
  def test_invalid_email():
      invalid1 = "user@example"
      with pytest.raises(ValidationError):
          validate.email(invalid1)
      invalid2 = "example.com"
      with pytest.raises(ValidationError):
          validate.email(invalid2)
      invalid3 = "user"
      with pytest.raises(ValidationError):
          validate.email(invalid3)
      with pytest.raises(ValidationError):
          validate.email('@nouser.com')
  
  def test_validate_email_none():
      assert validate.email(None) is None
  
  def test_validate_url_none():
      assert validate.url(None) is None
  
+ def test_min_length():
+     with pytest.raises(ValidationError):
+         validate.length('foo', 4, 5)
+     assert validate.length('foo', 3, 5) == 'foo'
+     with pytest.raises(ValidationError):
+         validate.length([1, 2, 3], 4, 5)
+     assert validate.length([1, 2, 3], 3, 5) == [1, 2, 3]
+     with pytest.raises(ValidationError):
+         validate.length('foo', 5)
+ 
+ def test_max_length():
+     with pytest.raises(ValidationError):
+         validate.length('foo', 1, 2)
+     assert validate.length('foo', 1, 3) == 'foo'
+     with pytest.raises(ValidationError):
+         validate.length([1, 2, 3], 1, 2)
+     assert validate.length([1, 2, 3], 1, 3) == [1, 2, 3]
+     with pytest.raises(ValidationError):
+         validate.length('foo', None, 2)
+ 
+ def test_validate_length_none():
+     assert validate.length(None) is None
+ 
Add length validator unit tests
## Code Before:
import pytest

from marshmallow import validate, ValidationError

def test_invalid_email():
    invalid1 = "user@example"
    with pytest.raises(ValidationError):
        validate.email(invalid1)
    invalid2 = "example.com"
    with pytest.raises(ValidationError):
        validate.email(invalid2)
    invalid3 = "user"
    with pytest.raises(ValidationError):
        validate.email(invalid3)
    with pytest.raises(ValidationError):
        validate.email('@nouser.com')

def test_validate_email_none():
    assert validate.email(None) is None

def test_validate_url_none():
    assert validate.url(None) is None

## Instruction:
Add length validator unit tests
## Code After:
import pytest

from marshmallow import validate, ValidationError

def test_invalid_email():
    invalid1 = "user@example"
    with pytest.raises(ValidationError):
        validate.email(invalid1)
    invalid2 = "example.com"
    with pytest.raises(ValidationError):
        validate.email(invalid2)
    invalid3 = "user"
    with pytest.raises(ValidationError):
        validate.email(invalid3)
    with pytest.raises(ValidationError):
        validate.email('@nouser.com')

def test_validate_email_none():
    assert validate.email(None) is None

def test_validate_url_none():
    assert validate.url(None) is None

def test_min_length():
    with pytest.raises(ValidationError):
        validate.length('foo', 4, 5)
    assert validate.length('foo', 3, 5) == 'foo'
    with pytest.raises(ValidationError):
        validate.length([1, 2, 3], 4, 5)
    assert validate.length([1, 2, 3], 3, 5) == [1, 2, 3]
    with pytest.raises(ValidationError):
        validate.length('foo', 5)

def test_max_length():
    with pytest.raises(ValidationError):
        validate.length('foo', 1, 2)
    assert validate.length('foo', 1, 3) == 'foo'
    with pytest.raises(ValidationError):
        validate.length([1, 2, 3], 1, 2)
    assert validate.length([1, 2, 3], 1, 3) == [1, 2, 3]
    with pytest.raises(ValidationError):
        validate.length('foo', None, 2)

def test_validate_length_none():
    assert validate.length(None) is None
