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Fix handling of stubs with the same name

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Michael Miller 2022-03-26 00:13:24 -06:00
parent 1199379833
commit 1327d74040
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1 changed files with 42 additions and 22 deletions
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64
src/spectator/mocks/null_double.cr
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@ -1,6 +1,7 @@
require "./double"
require "./method_call"
require "./stubbed_name"
require "./unexpected_message"
module Spectator
# Stands in for an object for testing that a SUT calls expected methods.
@ -23,39 +24,58 @@ module Spectator
end
private def _spectator_stub_fallback(call : MethodCall, &)
Log.trace { "Fallback for #{call} - return self" }
self
end
private def _spectator_stub_fallback(call : MethodCall, type : self, &)
Log.trace { "Fallback for #{call} - return self" }
self
end
private def _spectator_stub_fallback(call : MethodCall, type, &)
Log.trace { "Fallback for #{call} - call original" }
yield
if @stubs.any? { |stub| stub.method == call.method }
Log.info { "Stubs are defined for #{call.method.inspect}, but none matched (no argument constraints met)." }
raise UnexpectedMessage.new("#{_spectator_stubbed_name} received unexpected message #{call}")
else
Log.trace { "Fallback for #{call} - return original" }
yield
end
end
private def _spectator_abstract_stub_fallback(call : MethodCall)
Log.trace { "Fallback for #{call} - return self" }
self
if @stubs.any? { |stub| stub.method == call.method }
Log.info { "Stubs are defined for #{call.method.inspect}, but none matched (no argument constraints met)." }
raise UnexpectedMessage.new("#{_spectator_stubbed_name} received unexpected message #{call}")
else
Log.trace { "Fallback for #{call} - return self" }
self
end
end
private def _spectator_abstract_stub_fallback(call : MethodCall, type : self)
Log.trace { "Fallback for #{call} - return self" }
self
private def _spectator_abstract_stub_fallback(call : MethodCall, _type : self)
_spectator_abstract_stub_fallback(call)
end
private def _spectator_abstract_stub_fallback(call : MethodCall, type)
raise TypeCastError.new("#{_spectator_stubbed_name} received message #{call} and is attempting to return `self`, but returned type must be `#{type}`.")
if @stubs.any? { |stub| stub.method == call.method }
Log.info { "Stubs are defined for #{call.method.inspect}, but none matched (no argument constraints met)." }
raise UnexpectedMessage.new("#{_spectator_stubbed_name} received unexpected message #{call}")
else
raise TypeCastError.new("#{_spectator_stubbed_name} received message #{call} and is attempting to return `self`, but returned type must be `#{type}`.")
end
end
# Handle all methods but only respond to configured messages.
# Returns self.
# Handles all undefined messages.
# Returns stubbed values if available, otherwise delegates to `#_spectator_abstract_stub_fallback`.
macro method_missing(call)
Log.trace { "Got undefined method `{{call.name}}({{*call.args}}{% if call.named_args %}{% unless call.args.empty? %}, {% end %}{{*call.named_args}}{% end %}){% if call.block %} { ... }{% end %}` - returning self" }
self
Log.trace { "Got undefined method `{{call.name}}({{*call.args}}{% if call.named_args %}{% unless call.args.empty? %}, {% end %}{{*call.named_args}}{% end %}){% if call.block %} { ... }{% end %}`" }
# Capture information about the call.
%args = ::Spectator::Arguments.capture({{call.args.splat(", ")}}{% if call.named_args %}{{*call.named_args}}{% end %})
%call = ::Spectator::MethodCall.new({{call.name.symbolize}}, %args)
# Attempt to find a stub that satisfies the method call and arguments.
if %stub = _spectator_find_stub(%call)
# A method that was not defined during initialization was stubbed.
# Return the value of the stub as-is.
# Might want to give a warning here, as this may produce a "bloated" union of all known stub types.
%stub.as(::Spectator::ValueStub).value
else
# A stub wasn't found, invoke the fallback logic.
# Message received for a methods that isn't stubbed nor defined when initialized.
_spectator_abstract_stub_fallback(%call)
end
end
end
end