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Initial work on Double
This commit is contained in:
Michael Miller
parent
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commit
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4 changed files with 216 additions and 0 deletions
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require "json" # Needed to test masking Object#to_json in doubles.
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require "yaml" # Needed to test masking Object#to_yaml in doubles.
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require "../src/spectator"
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require "../src/spectator/should"
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require "./helpers/**"
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114
spec/spectator/mocks/double_spec.cr
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114
spec/spectator/mocks/double_spec.cr
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require "../../spec_helper"
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Spectator.describe Spectator::Double do
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subject(dbl) { Spectator::Double.new(foo: 42, bar: "baz") }
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it "responds to defined messages" do
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aggregate_failures do
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expect(dbl.foo).to eq(42)
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expect(dbl.bar).to eq("baz")
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end
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end
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it "fails on undefined messages" do
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expect { dbl.baz }.to raise_error(Spectator::UnexpectedMessage)
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end
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context "with common object methods" do
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subject(dbl) do
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Spectator::Double.new(
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"!=": "!=",
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"!~": "!~",
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"==": "==",
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"===": "===",
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"=~": "=~",
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"class": "class",
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"dup": "dup",
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"hash": "hash",
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"in?": true,
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"inspect": "inspect",
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"itself": "itself",
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"not_nil!": "not_nil!",
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"pretty_inspect": "pretty_inspect",
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"tap": "tap",
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"to_json": "to_json",
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"to_pretty_json": "to_pretty_json",
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"to_s": "to_s",
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"to_yaml": "to_yaml",
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"try": "try",
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"object_id": 42_u64,
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"same?": false,
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)
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end
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it "responds with defined messages" do
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aggregate_failures do
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expect(dbl.!=(42)).to eq("!=")
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expect(dbl.!~(42)).to eq("!~")
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expect(dbl.==(42)).to eq("==")
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expect(dbl.===(42)).to eq("===")
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expect(dbl.=~(42)).to eq("=~")
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expect(dbl.class).to eq("class")
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expect(dbl.dup).to eq("dup")
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expect(dbl.hash(42)).to eq("hash")
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expect(dbl.hash).to eq("hash")
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expect(dbl.in?(42)).to eq(true)
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expect(dbl.in?(1, 2, 3)).to eq(true)
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expect(dbl.inspect).to eq("inspect")
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expect(dbl.itself).to eq("itself")
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expect(dbl.not_nil!).to eq("not_nil!")
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expect(dbl.pretty_inspect).to eq("pretty_inspect")
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expect(dbl.tap { nil }).to eq("tap")
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expect(dbl.to_json).to eq("to_json")
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expect(dbl.to_pretty_json).to eq("to_pretty_json")
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expect(dbl.to_s).to eq("to_s")
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expect(dbl.to_yaml).to eq("to_yaml")
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expect(dbl.try { nil }).to eq("try")
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expect(dbl.object_id).to eq(42_u64)
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expect(dbl.same?(dbl)).to eq(false)
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expect(dbl.same?(nil)).to eq(false)
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end
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end
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end
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context "without common object methods" do
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subject(dbl) { Spectator::Double.new }
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it "raises with undefined messages" do
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io = IO::Memory.new
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pp = PrettyPrint.new(io)
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aggregate_failures do
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expect { dbl.!=(42) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.!~(42) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.==(42) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.===(42) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.=~(42) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.class }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.dup }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.hash(42) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.hash }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.in?(42) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.in?(1, 2, 3) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.inspect }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.itself }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.not_nil! }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.pretty_inspect }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.pretty_inspect(io) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.pretty_print(pp) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.tap { nil } }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.to_json }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.to_json(io) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.to_pretty_json }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.to_pretty_json(io) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.to_s }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.to_s(io) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.to_yaml }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.to_yaml(io) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.try { nil } }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.object_id }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.same?(dbl) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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expect { dbl.same?(nil) }.to raise_error(Spectator::UnexpectedMessage, /mask/)
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end
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end
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end
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end
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95
src/spectator/mocks/double.cr
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95
src/spectator/mocks/double.cr
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require "./unexpected_message"
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module Spectator
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class Double(Messages)
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def initialize(**@messages : **Messages)
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end
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# TODO: Define macro to redefine a type's method.
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# TODO: Better error for type mismatch
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macro finished
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# Object
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{% for meth in @type.superclass.superclass.methods %}
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{% if !meth.abstract? && !DSL::RESERVED_KEYWORDS.includes?(meth.name.symbolize) %}
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{% if meth.visibility != :public %}{{meth.visibility.id}}{% end %} def {{meth.receiver}}{{meth.name}}(
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{{meth.args.splat}}{% if !meth.args.empty? %}, {% end %}
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{% if meth.double_splat %}**{{meth.double_splat}}, {% end %}
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{% if meth.block_arg %}&{{meth.block_arg}}{% elsif meth.accepts_block? %}&{% end %}
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){% if meth.return_type %} : {{meth.return_type}}{% end %}{% if !meth.free_vars.empty? %} forall {{meth.free_vars.splat}}{% end %}
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\{% if type = Messages[{{meth.name.symbolize}}] %}
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{% if meth.return_type %}
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\{% if type <= {{meth.return_type}} %}
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@messages[{{meth.name.symbolize}}].as({{meth.return_type}})
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\{% else %}
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raise "Type mismatch {{meth.name}} : {{meth.return_type}}"
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\{% end %}
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{% else %}
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@messages[{{meth.name.symbolize}}]
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{% end %}
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\{% else %}
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raise UnexpectedMessage.new("Received unexpected message {{meth.name}} on double <TODO:NAME> (masking ancestor).")
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\{% end %}
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end
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{% end %}
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{% end %}
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# Reference
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{% for meth in @type.superclass.methods %}
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{% if !meth.abstract? && !DSL::RESERVED_KEYWORDS.includes?(meth.name.symbolize) %}
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{% if meth.visibility != :public %}{{meth.visibility.id}}{% end %} def {{meth.receiver}}{{meth.name}}(
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{{meth.args.splat}}{% if !meth.args.empty? %}, {% end %}
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{% if meth.double_splat %}**{{meth.double_splat}}, {% end %}
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{% if meth.block_arg %}&{{meth.block_arg}}{% elsif meth.accepts_block? %}&{% end %}
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){% if meth.return_type %} : {{meth.return_type}}{% end %}{% if !meth.free_vars.empty? %} forall {{meth.free_vars.splat}}{% end %}
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\{% if type = Messages[{{meth.name.symbolize}}] %}
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{% if meth.return_type %}
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\{% if type <= {{meth.return_type}} %}
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@messages[{{meth.name.symbolize}}].as({{meth.return_type}})
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\{% else %}
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raise "Type mismatch {{meth.name}} : {{meth.return_type}}"
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\{% end %}
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{% else %}
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@messages[{{meth.name.symbolize}}]
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{% end %}
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\{% else %}
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raise UnexpectedMessage.new("Received unexpected message {{meth.name}} on double <TODO:NAME> (masking ancestor).")
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\{% end %}
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end
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{% end %}
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{% end %}
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# Double
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{% for meth in @type.methods %}
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{% if !meth.abstract? && !DSL::RESERVED_KEYWORDS.includes?(meth.name.symbolize) %}
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{% if meth.visibility != :public %}{{meth.visibility.id}}{% end %} def {{meth.receiver}}{{meth.name}}(
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{{meth.args.splat}}{% if !meth.args.empty? %}, {% end %}
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{% if meth.double_splat %}**{{meth.double_splat}}, {% end %}
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{% if meth.block_arg %}&{{meth.block_arg}}{% elsif meth.accepts_block? %}&{% end %}
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){% if meth.return_type %} : {{meth.return_type}}{% end %}{% if !meth.free_vars.empty? %} forall {{meth.free_vars.splat}}{% end %}
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\{% if type = Messages[{{meth.name.symbolize}}] %}
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{% if meth.return_type %}
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\{% if type <= {{meth.return_type}} %}
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@messages[{{meth.name.symbolize}}].as({{meth.return_type}})
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\{% else %}
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raise "Type mismatch {{meth.name}} : {{meth.return_type}}"
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\{% end %}
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{% else %}
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@messages[{{meth.name.symbolize}}]
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{% end %}
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\{% else %}
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raise UnexpectedMessage.new("Received unexpected message {{meth.name}} on double <TODO:NAME> (masking ancestor).")
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\{% end %}
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end
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{% end %}
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{% end %}
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end
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macro method_missing(call)
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\{% if Messages.keys.includes?({{call.name.symbolize}}.id) %}
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@messages[{{call.name.symbolize}}]
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\{% else %}
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raise UnexpectedMessage.new("Received unexpected message {{call.name}} on double <TODO:NAME>.")
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\{% end %}
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end
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end
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end
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5
src/spectator/mocks/unexpected_message.cr
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5
src/spectator/mocks/unexpected_message.cr
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module Spectator
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# Exception raised by a mock or double when a message is received that have been.
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class UnexpectedMessage < Exception
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end
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end
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