Class: Igniter::Extensions::Contracts::Invariants::Invariant

Inherits:
Object
  • Object
show all
Defined in:
lib/igniter/extensions/contracts/invariants/invariant.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, &block) ⇒ Invariant

Returns a new instance of Invariant.

Raises:

  • (ArgumentError) 


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# File 'lib/igniter/extensions/contracts/invariants/invariant.rb', line 10

def initialize(name, &block)
  raise ArgumentError, "invariant #{name.inspect} requires a block" unless block

  @name = name.to_sym
  @block = block
  freeze
end

Instance Attribute Details

#block ⇒ Object (readonly)

Returns the value of attribute block.



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# File 'lib/igniter/extensions/contracts/invariants/invariant.rb', line 8

def block
  @block
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/igniter/extensions/contracts/invariants/invariant.rb', line 8

def name
  @name
end

Instance Method Details

#check(outputs) ⇒ Object 



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# File 'lib/igniter/extensions/contracts/invariants/invariant.rb', line 18

def check(outputs)
  passed = block.call(**outputs)
  return nil if passed

  Violation.new(name: name, outputs: outputs)
rescue StandardError => e
  Violation.new(name: name, outputs: outputs, error: e)
end