class Assert::Assertions::IsBlank(PropertyType)

Overview

Validates a property is blank, that is, consists exclusively of unicode whitespace.

Optional Arguments

Example

class Example
  include Assert

  def initialize; end

  @[Assert::IsBlank]
  property string : String = ""

  @[Assert::IsBlank]
  property multiple_spaces : String = "      "

  @[Assert::IsBlank]
  property nilble_string : String? = nil

  @[Assert::IsBlank(normalizer: ->(actual : String) { actual.chomp('a') })]
  property normalizer : String = "    a"
end

Example.new.valid? # => true

Defined in:

assertions/is_blank.cr

Constructors

Instance Method Summary

Instance methods inherited from class Assert::Assertions::Assertion

default_message_template : String default_message_template, groups : Array(String) groups, message : String message, message_template : String message_template, property_name : String property_name, valid? : Bool valid?

Constructor methods inherited from class Assert::Assertions::Assertion

new(property_name : String, message : String? = nil, groups : Array(String)? = nil) new

Constructor Detail

def self.new(property_name : String, actual : Union(String, Nil), normalizer : Proc(String, String)? = nil, message : String? = nil, groups : Array(String)? = nil) #

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Instance Method Detail

def default_message_template : String #

Returns the default #message_template to use if no message is provided.


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def message : String #

The message to display if self is not valid.

NOTE This method is defined automatically, and is just present for documentation purposes.


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def valid? : Bool #

Returns true if a property satisfies self, otherwise false.


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