To add a collaborator to this project you will need to use the Relish gem to add the collaborator via a terminal command. Soon you'll be able to also add collaborators here!
More about adding a collaboratorequality matchers
Ruby exposes several different methods for handling equality:
a.equal?(b) # object identity - a and b refer to the same object
a.eql?(b) # object equivalence - a and b have the same value
a == b # object equivalence - a and b have the same value with type conversions
Note that these descriptions are guidelines but are not forced by the
language. Any object can implement any of these methods with its own
semantics.
rspec-expectations ships with matchers that align with each of these methods:
a.should equal(b) # passes if a.equal?(b)
a.should eql(b) # passes if a.eql?(b)
a.should == b # passes if a == b
It also ships with two matchers that have more of a DSL feel to them:
a.should be(b) # passes if a.equal?(b)
a.should eq(b) # passes if a == b
These are a useful pair if you wish to avoid the warning that Ruby emits on
a.should == b
- Scenarios
-
- compare using eq (==)
- compare using ==
- compare using eql (eql?)
- compare using equal (equal?)
- compare using be (equal?)
- compare using eq (==)
-
- Given
-
a file named "compare_using_eq.rb" with:
require 'spec_helper' describe "a string" do it "is equal to another string of the same value" do "this string".should eq("this string") end it "is not equal to another string of a different value" do "this string".should_not eq("a different string") end end describe "an integer" do it "is equal to a float of the same value" do 5.should eq(5.0) end end
- When
-
I run
rspec compare_using_eq.rb
- Then
- the output should contain "3 examples, 0 failures"
- compare using ==
-
- Given
-
a file named "compare_using_==.rb" with:
require 'spec_helper' describe "a string" do it "is equal to another string of the same value" do "this string".should == "this string" end it "is not equal to another string of a different value" do "this string".should_not == "a different string" end end describe "an integer" do it "is equal to a float of the same value" do 5.should == 5.0 end end
- When
-
I run
rspec compare_using_==.rb
- Then
- the output should contain "3 examples, 0 failures"
- compare using eql (eql?)
-
- Given
-
a file named "compare_using_eql.rb" with:
require 'spec_helper' describe "an integer" do it "is equal to another integer of the same value" do 5.should eql(5) end it "is not equal to another integer of a different value" do 5.should_not eql(6) end it "is not equal to a float of the same value" do 5.should_not eql(5.0) end end
- When
-
I run
rspec compare_using_eql.rb
- Then
- the output should contain "3 examples, 0 failures"
- compare using equal (equal?)
-
- Given
-
a file named "compare_using_equal.rb" with:
require 'spec_helper' describe "a string" do it "is equal to itself" do string = "this string" string.should equal(string) end it "is not equal to another string of the same value" do "this string".should_not equal("this string") end it "is not equal to another string of a different value" do "this string".should_not equal("a different string") end end
- When
-
I run
rspec compare_using_equal.rb
- Then
- the output should contain "3 examples, 0 failures"
- compare using be (equal?)
-
- Given
-
a file named "compare_using_be.rb" with:
require 'spec_helper' describe "a string" do it "is equal to itself" do string = "this string" string.should be(string) end it "is not equal to another string of the same value" do "this string".should_not be("this string") end it "is not equal to another string of a different value" do "this string".should_not be("a different string") end end
- When
-
I run
rspec compare_using_be.rb
- Then
- the output should contain "3 examples, 0 failures"
Last published over 7 years ago by alindeman.