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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
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