require "./expression"
require "./label"

module Spectator
  # Represents a value from a test.
  # This is typically captured by an `expect` macro.
  # It consists of a label and the value of the expression.
  # The label should be a string recognizable by the user,
  # or nil if one isn't available.
  class Value(T) < Expression(T)
    # Raw value of the expression.
    getter value : T

    # Creates the value.
    # Expects the *value* of the expression and a *label* describing it.
    # The *label* is usually the Crystal code evaluating to the *value*.
    def initialize(@value : T, label : Label)
      super(label)
    end

    # Creates the value.
    # Expects the *value* of the expression.
    # It can be nil if it isn't available.
    # A label is generated by calling `#inspect` on the *value*.
    def initialize(@value : T)
      super(@value.inspect)
    end
  end
end