class Assert::Assertions::Size(PropertyType, RangeType)

• Assert::Assertions::Size(PropertyType, RangeType)
• Assert::Assertions::Assertion
• Reference
• Object

Overview

Validates a property's size is within a given Range.

Optional Arguments

• exact_message - Message to display if range's begin and end are the same and actual is not that value.
• min_message - Message to display if actual is too small.
• max_message - Message to display if actual is too big.
• normalizer - Execute a Proc to alter actual before checking its validity.

Example

class Example
  include Assert

  def initialize; end

  @[Assert::Size(Range(Float64, Float64), range: 2.0..3.0)]
  property fav_numbers : Array(Int32) = [1, 2, 3]

  @[Assert::Size(Range(Float64, Float64), range: 5.0..10.0, min_message: "Password should be at least 5 characters", max_message: "Password cannot be more than 10 characters")]
  property password : String = "monkey12"

  @[Assert::Size(Range(Int32, Int32), range: 5..5, exact_message: "Value must be exactly 5 characters")]
  property exact_value : String = "hello"

  @[Assert::Size(Range(Float64, Float64), range: 5.0..10.0, normalizer: ->(actual : String) { actual.strip })]
  property normalizer : String = "   crystal   "
end

Example.new.valid? # => true

NOTE PropertyType can be anything that implements #size.

NOTE The generic RangeType represents the type of range.

Defined in:

Constructors

• .new(property_name : String, actual : PropertyType, range : RangeType, normalizer : Proc(PropertyType, PropertyType)? = nil, exact_message : String? = nil, min_message : String? = nil, max_message : String? = nil, message : String? = nil, groups : Array(String)? = nil)

Instance Method Summary

• #default_message_template : String

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

• #message : String

  The message to display if self is not valid.

• #valid? : Bool

  Returns true if a property satisfies self, otherwise false.

Constructor Detail

Instance Method Detail