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require 'spec_helper'
describe "Matchers should be able to generate their own descriptions" do
after(:each) do
RSpec::Matchers.clear_generated_description
end
it "expect(...).to eq expected" do
expect("this").to eq "this"
expect(RSpec::Matchers.generated_description).to eq "should eq \"this\""
end
it "expect(...).to not eq expected" do
expect("this").not_to eq "that"
expect(RSpec::Matchers.generated_description).to eq "should not eq \"that\""
end
it "expect(...).to be empty (arbitrary predicate)" do
expect([]).to be_empty
expect(RSpec::Matchers.generated_description).to eq "should be empty"
end
it "expect(...).to not be empty (arbitrary predicate)" do
expect([1]).not_to be_empty
expect(RSpec::Matchers.generated_description).to eq "should not be empty"
end
it "expect(...).to be true" do
expect(true).to be_true
expect(RSpec::Matchers.generated_description).to eq "should be true"
end
it "expect(...).to be false" do
expect(false).to be_false
expect(RSpec::Matchers.generated_description).to eq "should be false"
end
it "expect(...).to be nil" do
expect(nil).to be_nil
expect(RSpec::Matchers.generated_description).to eq "should be nil"
end
it "expect(...).to be > n" do
expect(5).to be > 3
expect(RSpec::Matchers.generated_description).to eq "should be > 3"
end
it "expect(...).to be predicate arg1, arg2 and arg3" do
expect(5.0).to be_between(0,10)
expect(RSpec::Matchers.generated_description).to eq "should be between 0 and 10"
end
it "expect(...).to equal" do
expected = "expected"
expect(expected).to equal(expected)
expect(RSpec::Matchers.generated_description).to eq "should equal \"expected\""
end
it "expect(...).not_to equal" do
expect(5).not_to equal(37)
expect(RSpec::Matchers.generated_description).to eq "should not equal 37"
end
it "expect(...).to eql" do
expect("string").to eql("string")
expect(RSpec::Matchers.generated_description).to eq "should eql \"string\""
end
it "expect(...).not_to eql" do
expect("a").not_to eql(:a)
expect(RSpec::Matchers.generated_description).to eq "should not eql :a"
end
it "expect(...).to have_key" do
expect({:a => "a"}).to have_key(:a)
expect(RSpec::Matchers.generated_description).to eq "should have key :a"
end
it "expect(...).to have_some_method" do
object = Object.new
def object.has_eyes_closed?; true; end
expect(object).to have_eyes_closed
expect(RSpec::Matchers.generated_description).to eq 'should have eyes closed'
end
it "expect(...).to have_some_method(args*)" do
object = Object.new
def object.has_taste_for?(*args); true; end
expect(object).to have_taste_for("wine", "cheese")
expect(RSpec::Matchers.generated_description).to eq 'should have taste for "wine", "cheese"'
end
it "expect(...).to have n items" do
expect(team).to have(3).players
expect(RSpec::Matchers.generated_description).to eq "should have 3 players"
end
it "expect(...).to have at least n items" do
expect(team).to have_at_least(2).players
expect(RSpec::Matchers.generated_description).to eq "should have at least 2 players"
end
it "expect(...).to have at most n items" do
expect(team).to have_at_most(4).players
expect(RSpec::Matchers.generated_description).to eq "should have at most 4 players"
end
it "expect(...).to include(x)" do
expect([1,2,3]).to include(3)
expect(RSpec::Matchers.generated_description).to eq "should include 3"
end
it "expect(...).to include(x) when x responds to description but is not a matcher" do
obj = double(:description => "description", :inspect => "inspect")
expect([obj]).to include(obj)
expect(RSpec::Matchers.generated_description).to eq "should include inspect"
end
it "expect(...).to include(x) when x responds to description and is a matcher" do
matcher = double(:description => "description",
:matches? => true,
:failure_message_for_should => "")
expect([matcher]).to include(matcher)
expect(RSpec::Matchers.generated_description).to eq "should include description"
end
it "expect(array).not_to match_array [1,2,3]" do
expect([1,2,3]).to match_array [1,2,3]
expect(RSpec::Matchers.generated_description).to eq "should contain exactly 1, 2 and 3"
end
it "expect(...).to match" do
expect("this string").to match(/this string/)
expect(RSpec::Matchers.generated_description).to eq "should match /this string/"
end
it "expect(...).to raise_error" do
expect { raise }.to raise_error
expect(RSpec::Matchers.generated_description).to eq "should raise Exception"
end
it "expect(...).to raise_error with type" do
expect { raise }.to raise_error(RuntimeError)
expect(RSpec::Matchers.generated_description).to eq "should raise RuntimeError"
end
it "expect(...).to raise_error with type and message" do
expect { raise "there was an error" }.to raise_error(RuntimeError, "there was an error")
expect(RSpec::Matchers.generated_description).to eq "should raise RuntimeError with \"there was an error\""
end
it "expect(...).to respond_to" do
expect([]).to respond_to(:insert)
expect(RSpec::Matchers.generated_description).to eq "should respond to #insert"
end
it "expect(...).to throw symbol" do
expect { throw :what_a_mess }.to throw_symbol
expect(RSpec::Matchers.generated_description).to eq "should throw a Symbol"
end
it "expect(...).to throw symbol (with named symbol)" do
expect { throw :what_a_mess }.to throw_symbol(:what_a_mess)
expect(RSpec::Matchers.generated_description).to eq "should throw :what_a_mess"
end
def team
Class.new do
def players
[1,2,3]
end
end.new
end
end
describe "a Matcher with no description" do
def matcher
Class.new do
def matches?(ignore); true; end
def failure_message; ""; end
end.new
end
it "provides a helpful message when used in a string-less example block" do
expect(5).to matcher
expect(RSpec::Matchers.generated_description).to match(/When you call.*description method/m)
end
end
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