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be.feature
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be.feature
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Feature: "be" matchers
There are several related "be" matchers:
```ruby
obj.should be_truthy # passes if obj is truthy (not nil or false)
obj.should be_falsey # passes if obj is falsy (nil or false)
obj.should be_nil # passes if obj is nil
obj.should be # passes if obj is truthy (not nil or false)
```
Scenario: be_truthy matcher
Given a file named "be_truthy_spec.rb" with:
"""ruby
describe "be_truthy matcher" do
specify { true.should be_truthy }
specify { 7.should be_truthy }
specify { "foo".should be_truthy }
specify { nil.should_not be_truthy }
specify { false.should_not be_truthy }
# deliberate failures
specify { true.should_not be_truthy }
specify { 7.should_not be_truthy }
specify { "foo".should_not be_truthy }
specify { nil.should be_truthy }
specify { false.should be_truthy }
end
"""
When I run `rspec be_truthy_spec.rb`
Then the output should contain "10 examples, 5 failures"
And the output should contain:
"""
expected: falsey value
got: true
"""
And the output should contain:
"""
expected: falsey value
got: 7
"""
And the output should contain:
"""
expected: falsey value
got: "foo"
"""
And the output should contain:
"""
expected: truthy value
got: nil
"""
And the output should contain:
"""
expected: truthy value
got: false
"""
Scenario: be_falsey matcher
Given a file named "be_falsey_spec.rb" with:
"""ruby
describe "be_falsey matcher" do
specify { nil.should be_falsey }
specify { false.should be_falsey }
specify { true.should_not be_falsey }
specify { 7.should_not be_falsey }
specify { "foo".should_not be_falsey }
# deliberate failures
specify { nil.should_not be_falsey }
specify { false.should_not be_falsey }
specify { true.should be_falsey }
specify { 7.should be_falsey }
specify { "foo".should be_falsey }
end
"""
When I run `rspec be_falsey_spec.rb`
Then the output should contain "10 examples, 5 failures"
And the output should contain:
"""
expected: truthy value
got: nil
"""
And the output should contain:
"""
expected: truthy value
got: false
"""
And the output should contain:
"""
expected: falsey value
got: true
"""
And the output should contain:
"""
expected: falsey value
got: 7
"""
And the output should contain:
"""
expected: falsey value
got: "foo"
"""
Scenario: be_nil matcher
Given a file named "be_nil_spec.rb" with:
"""ruby
describe "be_nil matcher" do
specify { nil.should be_nil }
specify { false.should_not be_nil }
specify { true.should_not be_nil }
specify { 7.should_not be_nil }
specify { "foo".should_not be_nil }
# deliberate failures
specify { nil.should_not be_nil }
specify { false.should be_nil }
specify { true.should be_nil }
specify { 7.should be_nil }
specify { "foo".should be_nil }
end
"""
When I run `rspec be_nil_spec.rb`
Then the output should contain "10 examples, 5 failures"
And the output should contain:
"""
expected: not nil
got: nil
"""
And the output should contain:
"""
expected: nil
got: false
"""
And the output should contain:
"""
expected: nil
got: true
"""
And the output should contain:
"""
expected: nil
got: 7
"""
And the output should contain:
"""
expected: nil
got: "foo"
"""
Scenario: be matcher
Given a file named "be_spec.rb" with:
"""ruby
describe "be_matcher" do
specify { true.should be }
specify { 7.should be }
specify { "foo".should be }
specify { nil.should_not be }
specify { false.should_not be }
# deliberate failures
specify { true.should_not be }
specify { 7.should_not be }
specify { "foo".should_not be }
specify { nil.should be }
specify { false.should be }
end
"""
When I run `rspec be_spec.rb`
Then the output should contain all of these:
| 10 examples, 5 failures |
| expected true to evaluate to false |
| expected 7 to evaluate to false |
| expected "foo" to evaluate to false |
| expected nil to evaluate to true |
| expected false to evaluate to true |