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Initial work on Double

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Michael Miller 2022-03-03 22:10:09 -07:00
parent 8ac6546bdd
commit 26deea3d20
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95
src/spectator/mocks/double.cr Normal file
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require "./unexpected_message"
module Spectator
class Double(Messages)
def initialize(**@messages : **Messages)
end
# TODO: Define macro to redefine a type's method.
# TODO: Better error for type mismatch
macro finished
# Object
{% for meth in @type.superclass.superclass.methods %}
{% if !meth.abstract? && !DSL::RESERVED_KEYWORDS.includes?(meth.name.symbolize) %}
{% if meth.visibility != :public %}{{meth.visibility.id}}{% end %} def {{meth.receiver}}{{meth.name}}(
{{meth.args.splat}}{% if !meth.args.empty? %}, {% end %}
{% if meth.double_splat %}**{{meth.double_splat}}, {% end %}
{% if meth.block_arg %}&{{meth.block_arg}}{% elsif meth.accepts_block? %}&{% end %}
){% if meth.return_type %} : {{meth.return_type}}{% end %}{% if !meth.free_vars.empty? %} forall {{meth.free_vars.splat}}{% end %}
\{% if type = Messages[{{meth.name.symbolize}}] %}
{% if meth.return_type %}
\{% if type <= {{meth.return_type}} %}
@messages[{{meth.name.symbolize}}].as({{meth.return_type}})
\{% else %}
raise "Type mismatch {{meth.name}} : {{meth.return_type}}"
\{% end %}
{% else %}
@messages[{{meth.name.symbolize}}]
{% end %}
\{% else %}
raise UnexpectedMessage.new("Received unexpected message {{meth.name}} on double <TODO:NAME> (masking ancestor).")
\{% end %}
end
{% end %}
{% end %}
# Reference
{% for meth in @type.superclass.methods %}
{% if !meth.abstract? && !DSL::RESERVED_KEYWORDS.includes?(meth.name.symbolize) %}
{% if meth.visibility != :public %}{{meth.visibility.id}}{% end %} def {{meth.receiver}}{{meth.name}}(
{{meth.args.splat}}{% if !meth.args.empty? %}, {% end %}
{% if meth.double_splat %}**{{meth.double_splat}}, {% end %}
{% if meth.block_arg %}&{{meth.block_arg}}{% elsif meth.accepts_block? %}&{% end %}
){% if meth.return_type %} : {{meth.return_type}}{% end %}{% if !meth.free_vars.empty? %} forall {{meth.free_vars.splat}}{% end %}
\{% if type = Messages[{{meth.name.symbolize}}] %}
{% if meth.return_type %}
\{% if type <= {{meth.return_type}} %}
@messages[{{meth.name.symbolize}}].as({{meth.return_type}})
\{% else %}
raise "Type mismatch {{meth.name}} : {{meth.return_type}}"
\{% end %}
{% else %}
@messages[{{meth.name.symbolize}}]
{% end %}
\{% else %}
raise UnexpectedMessage.new("Received unexpected message {{meth.name}} on double <TODO:NAME> (masking ancestor).")
\{% end %}
end
{% end %}
{% end %}
# Double
{% for meth in @type.methods %}
{% if !meth.abstract? && !DSL::RESERVED_KEYWORDS.includes?(meth.name.symbolize) %}
{% if meth.visibility != :public %}{{meth.visibility.id}}{% end %} def {{meth.receiver}}{{meth.name}}(
{{meth.args.splat}}{% if !meth.args.empty? %}, {% end %}
{% if meth.double_splat %}**{{meth.double_splat}}, {% end %}
{% if meth.block_arg %}&{{meth.block_arg}}{% elsif meth.accepts_block? %}&{% end %}
){% if meth.return_type %} : {{meth.return_type}}{% end %}{% if !meth.free_vars.empty? %} forall {{meth.free_vars.splat}}{% end %}
\{% if type = Messages[{{meth.name.symbolize}}] %}
{% if meth.return_type %}
\{% if type <= {{meth.return_type}} %}
@messages[{{meth.name.symbolize}}].as({{meth.return_type}})
\{% else %}
raise "Type mismatch {{meth.name}} : {{meth.return_type}}"
\{% end %}
{% else %}
@messages[{{meth.name.symbolize}}]
{% end %}
\{% else %}
raise UnexpectedMessage.new("Received unexpected message {{meth.name}} on double <TODO:NAME> (masking ancestor).")
\{% end %}
end
{% end %}
{% end %}
end
macro method_missing(call)
\{% if Messages.keys.includes?({{call.name.symbolize}}.id) %}
@messages[{{call.name.symbolize}}]
\{% else %}
raise UnexpectedMessage.new("Received unexpected message {{call.name}} on double <TODO:NAME>.")
\{% end %}
end
end
end

5
src/spectator/mocks/unexpected_message.cr Normal file
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module Spectator
# Exception raised by a mock or double when a message is received that have been.
class UnexpectedMessage < Exception
end
end