require 'spec_helper'

describe "operator matchers", :uses_should do
  describe "should ==" do
    it "delegates message to target" do
      subject = "apple"
      subject.should_receive(:==).with("apple").and_return(true)
      subject.should == "apple"
    end

    it "returns true on success" do
      subject = "apple"
      (subject.should == "apple").should be_true
    end

    it "fails when target.==(actual) returns false" do
      subject = "apple"
      RSpec::Expectations.should_receive(:fail_with).with(%[expected: "orange"\n     got: "apple" (using ==)], "orange", "apple")
      subject.should == "orange"
    end
  end

  describe "unsupported operators", :if => RUBY_VERSION.to_f == 1.9 do
    it "raises an appropriate error for should != expected" do
      expect {
        "apple".should != "pear"
      }.to raise_error(/does not support `should != expected`.  Use `should_not == expected`/)
    end

    it "raises an appropriate error for should_not != expected" do
      expect {
        "apple".should_not != "pear"
      }.to raise_error(/does not support `should_not != expected`.  Use `should == expected`/)
    end

    it "raises an appropriate error for should !~ expected" do
      expect {
        "apple".should !~ /regex/
      }.to raise_error(/does not support `should !~ expected`.  Use `should_not =~ expected`/)
    end

    it "raises an appropriate error for should_not !~ expected" do
      expect {
        "apple".should_not !~ /regex/
      }.to raise_error(/does not support `should_not !~ expected`.  Use `should =~ expected`/)
    end
  end

  describe "should_not ==" do
    it "delegates message to target" do
      subject = "orange"
      subject.should_receive(:==).with("apple").and_return(false)
      subject.should_not == "apple"
    end

    it "returns true on success" do
      subject = "apple"
      (subject.should_not == "orange").should be_false
    end

    it "fails when target.==(actual) returns false" do
      subject = "apple"
      RSpec::Expectations.should_receive(:fail_with).with(%[expected not: == "apple"\n         got:    "apple"], "apple", "apple")
      subject.should_not == "apple"
    end
  end

  describe "should ===" do
    it "delegates message to target" do
      subject = "apple"
      subject.should_receive(:===).with("apple").and_return(true)
      subject.should === "apple"
    end

    it "fails when target.===(actual) returns false" do
      subject = "apple"
      subject.should_receive(:===).with("orange").and_return(false)
      RSpec::Expectations.should_receive(:fail_with).with(%[expected: "orange"\n     got: "apple" (using ===)], "orange", "apple")
      subject.should === "orange"
    end
  end

  describe "should_not ===" do
    it "delegates message to target" do
      subject = "orange"
      subject.should_receive(:===).with("apple").and_return(false)
      subject.should_not === "apple"
    end

    it "fails when target.===(actual) returns false" do
      subject = "apple"
      subject.should_receive(:===).with("apple").and_return(true)
      RSpec::Expectations.should_receive(:fail_with).with(%[expected not: === "apple"\n         got:     "apple"], "apple", "apple")
      subject.should_not === "apple"
    end
  end

  describe "should =~" do
    it "delegates message to target" do
      subject = "foo"
      subject.should_receive(:=~).with(/oo/).and_return(true)
      subject.should =~ /oo/
    end

    it "fails when target.=~(actual) returns false" do
      subject = "fu"
      subject.should_receive(:=~).with(/oo/).and_return(false)
      RSpec::Expectations.should_receive(:fail_with).with(%[expected: /oo/\n     got: "fu" (using =~)], /oo/, "fu")
      subject.should =~ /oo/
    end
  end

  describe "should_not =~" do
    it "delegates message to target" do
      subject = "fu"
      subject.should_receive(:=~).with(/oo/).and_return(false)
      subject.should_not =~ /oo/
    end

    it "fails when target.=~(actual) returns false" do
      subject = "foo"
      subject.should_receive(:=~).with(/oo/).and_return(true)
      RSpec::Expectations.should_receive(:fail_with).with(%[expected not: =~ /oo/\n         got:    "foo"], /oo/, "foo")
      subject.should_not =~ /oo/
    end
  end

  describe "should >" do
    it "passes if > passes" do
      4.should > 3
    end

    it "fails if > fails" do
      RSpec::Expectations.should_receive(:fail_with).with(%[expected: > 5\n     got:   4], 5, 4)
      4.should > 5
    end
  end

  describe "should >=" do
    it "passes if actual == expected" do
      4.should >= 4
    end

    it "passes if actual > expected" do
      4.should >= 3
    end

    it "fails if > fails" do
      RSpec::Expectations.should_receive(:fail_with).with(%[expected: >= 5\n     got:    4], 5, 4)
      4.should >= 5
    end
  end

  describe "should <" do
    it "passes if < passes" do
      4.should < 5
    end

    it "fails if > fails" do
      RSpec::Expectations.should_receive(:fail_with).with(%[expected: < 3\n     got:   4], 3, 4)
      4.should < 3
    end
  end

  describe "should <=" do
    it "passes if actual == expected" do
      4.should <= 4
    end

    it "passes if actual < expected" do
      4.should <= 5
    end

    it "fails if > fails" do
      RSpec::Expectations.should_receive(:fail_with).with(%[expected: <= 3\n     got:    4], 3, 4)
      4.should <= 3
    end
  end

  describe "OperatorMatcher registry" do
    let(:custom_klass) { Class.new }
    let(:custom_subklass) { Class.new(custom_klass) }

    after {
      RSpec::Matchers::OperatorMatcher.unregister(custom_klass, "=~")
    }

    it "allows operator matchers to be registered for types" do
      RSpec::Matchers::OperatorMatcher.register(custom_klass, "=~", RSpec::Matchers::BuiltIn::Match)
      expect(RSpec::Matchers::OperatorMatcher.get(custom_klass, "=~")).to eq(RSpec::Matchers::BuiltIn::Match)
    end

    it "considers ancestors when finding an operator matcher" do
      RSpec::Matchers::OperatorMatcher.register(custom_klass, "=~", RSpec::Matchers::BuiltIn::Match)
      expect(RSpec::Matchers::OperatorMatcher.get(custom_subklass, "=~")).to eq(RSpec::Matchers::BuiltIn::Match)
    end

    it "returns nil if there is no matcher registered for a type" do
      expect(RSpec::Matchers::OperatorMatcher.get(custom_klass, "=~")).to be_nil
    end
  end

  describe RSpec::Matchers::BuiltIn::PositiveOperatorMatcher do
    it "works when the target has implemented #send" do
      o = Object.new
      def o.send(*args); raise "DOH! Library developers shouldn't use #send!" end
      expect {
        o.should == o
      }.not_to raise_error
    end
  end

  describe RSpec::Matchers::BuiltIn::NegativeOperatorMatcher do
    it "works when the target has implemented #send" do
      o = Object.new
      def o.send(*args); raise "DOH! Library developers shouldn't use #send!" end
      expect {
        o.should_not == :foo
      }.not_to raise_error
    end
  end
end