Class: VCR::UnusedCassettes::CallContext

Inherits:
Object
  • Object
show all
Defined in:
lib/vcr/unused_cassettes/call_context.rb

Defined Under Namespace

Classes: MultiValue

Constant Summary collapse

ValueUnresolveable = 
Class.new(StandardError)

Instance Method Summary collapse

Constructor Details

#initialize(method_index: nil) ⇒ CallContext

Returns a new instance of CallContext.



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# File 'lib/vcr/unused_cassettes/call_context.rb', line 11

def initialize(method_index: nil)
  @method_index = method_index
  @context = {
    variables: {},
    constants: {}
  }
  @parameter_scopes = []
end

Instance Method Details

#enter_method(def_node) ⇒ Object 



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# File 'lib/vcr/unused_cassettes/call_context.rb', line 32

def enter_method(def_node)
  @parameter_scopes.push(build_parameter_frame(def_node))
end

#exit_method ⇒ Object 



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# File 'lib/vcr/unused_cassettes/call_context.rb', line 36

def exit_method
  @parameter_scopes.pop
end

#extract_value(node, string_interpolation_error: :raise) ⇒ Object 



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# File 'lib/vcr/unused_cassettes/call_context.rb', line 51

def extract_value(node, string_interpolation_error: :raise)
  case node.type
  when :nil_node
    nil
  when :string_node
    node.unescaped
  when :symbol_node
    node.unescaped.to_sym
  when :hash_node, :keyword_hash_node
    node.elements.each_with_object({}) do |element, hash|
      if element.type == :assoc_splat_node
        hash.merge(extract_value(element.value, string_interpolation_error: string_interpolation_error))
        next
      end
      key = extract_value(element.key, string_interpolation_error: string_interpolation_error)
      value = extract_value(element.value, string_interpolation_error: string_interpolation_error)
      hash[key] = value
    rescue ValueUnresolveable
      next
    end
  when :array_node
    node.elements.map do |element|
      extract_value(element, string_interpolation_error: string_interpolation_error)
    end
  when :interpolated_string_node
    part_options = node.parts.map { |part_node| interpolation_part_options(part_node, string_interpolation_error) }
    combinations = part_options.reduce([[]]) do |acc, options|
      acc.flat_map { |prefix| options.map { |opt| prefix + [opt] } }
    end
    results = combinations.map { |parts| parts.map(&:to_s).join }.uniq
    (results.size == 1) ? results.first : MultiValue.new(results)
  when :local_variable_read_node, :instance_variable_read_node
    unless variable_bound?(node.name)
      raise ValueUnresolveable, "Could not resolve value for node: #{node.inspect}"
    end
    value = resolve_variable(node.name)
    if value.is_a?(MultiValue) && string_interpolation_error != :wildcard
      raise ValueUnresolveable, "Multi-value binding cannot be embedded: #{node.inspect}"
    end
    value
  when :constant_read_node
    @context.dig(:constants, node.name)
  when :assoc_splat_node
    extract_value(node.value, string_interpolation_error: string_interpolation_error)
  else
    if node.respond_to?(:value) && !node.value.is_a?(Prism::Node)
      node.value
    else
      raise ValueUnresolveable, "Could not resolve value for node: #{node.inspect}"
    end
  end
end

#resolve_constant(constant_name) ⇒ Object 



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# File 'lib/vcr/unused_cassettes/call_context.rb', line 47

def resolve_constant(constant_name)
  @context.dig(:constants, constant_name)
end

#resolve_variable(variable_name) ⇒ Object 



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# File 'lib/vcr/unused_cassettes/call_context.rb', line 40

def resolve_variable(variable_name)
  @parameter_scopes.reverse_each do |frame|
    return frame[variable_name] if frame.key?(variable_name)
  end
  @context.dig(:variables, variable_name)
end

#track(node) ⇒ Object 



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# File 'lib/vcr/unused_cassettes/call_context.rb', line 20

def track(node)
  reset_local_variables! if new_test_node?(node)
  case node.type
  when :local_variable_write_node
    store_variable(node.name, node.value)
  when :constant_write_node
    store_constant(node.name, node.value)
  when :instance_variable_write_node
    store_variable(node.name, node.value)
  end
end