from coreschema import String

def test_string_type():

schema = String()

assert schema.validate('') == []

assert schema.validate('abc') == []

assert schema.validate(123) == [('Must be a string.', [])]

def test_max_length():

schema = String(max_length=3)

assert schema.validate('abc') == []

assert schema.validate('abcd') == [('Must have no more than 3 characters.', [])]

def test_min_length():

schema = String(min_length=3)

assert schema.validate('abc') == []

assert schema.validate('ab') == [('Must have at least 3 characters.', [])]

def test_blank():

schema = String(min_length=1)

assert schema.validate('abc') == []

assert schema.validate('') == [('Must not be blank.', [])]

def test_pattern():

schema = String(pattern='^a[0-9]$')

assert schema.validate('a3') == []

assert schema.validate('ab') == [('Must match the pattern /^a[0-9]$/.', [])]

schema = String(pattern='a[0-9]')

assert schema.validate('z a3 z') == []

assert schema.validate('z ab z ') == [('Must match the pattern /a[0-9]/.', [])]

def test_format_email():

schema = String(format='email')

assert schema.validate('a@b') == []

assert schema.validate('ab@') == [('Must be a valid email.', [])]

def test_format_uri():

schema = String(format='uri')

assert schema.validate('http://example.com') == []

assert schema.validate('example.com') == [('Must be a valid uri.', [])]