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Project: RSpec Core 3.6

Publisher: RSpec

Conditional Filters

The :if and :unless metadata keys can be used to filter examples without
needing to configure an exclusion filter.

Scenarios
  1. Implicit `:if` filter
  2. Implicit `:unless` filter
  3. Combining implicit filter with explicit inclusion filter
  4. Combining implicit filter with explicit exclusion filter
  5. The :if and :unless exclusions stay in effect when there are explicit inclusions
Implicit `:if` filter
Given
a file named "implicit_if_filter_spec.rb" with: 
RSpec.describe ":if => true group", :if => true do
  it(":if => true group :if => true example", :if => true) { }
  it(":if => true group :if => false example", :if => false) { }
  it(":if => true group no :if example") { }
end

RSpec.describe ":if => false group", :if => false do
  it(":if => false group :if => true example", :if => true) { }
  it(":if => false group :if => false example", :if => false) { }
  it(":if => false group no :if example") { }
end

RSpec.describe "no :if group" do
  it("no :if group :if => true example", :if => true) { }
  it("no :if group :if => false example", :if => false) { }
  it("no :if group no :if example") { }
end
When
I run rspec implicit_if_filter_spec.rb --format doc
Then
the output should contain all of these:
:if => true group :if => true example
:if => true group no :if example
:if => false group :if => true example
no :if group :if => true example
no :if group no :if example
And
the output should not contain any of these:
:if => true group :if => false example
:if => false group :if => false example
:if => false group no :if example
no :if group :if => false example
Implicit `:unless` filter
Given
a file named "implicit_unless_filter_spec.rb" with: 
RSpec.describe ":unless => true group", :unless => true do
  it(":unless => true group :unless => true example", :unless => true) { }
  it(":unless => true group :unless => false example", :unless => false) { }
  it(":unless => true group no :unless example") { }
end

RSpec.describe ":unless => false group", :unless => false do
  it(":unless => false group :unless => true example", :unless => true) { }
  it(":unless => false group :unless => false example", :unless => false) { }
  it(":unless => false group no :unless example") { }
end

RSpec.describe "no :unless group" do
  it("no :unless group :unless => true example", :unless => true) { }
  it("no :unless group :unless => false example", :unless => false) { }
  it("no :unless group no :unless example") { }
end
When
I run rspec implicit_unless_filter_spec.rb --format doc
Then
the output should contain all of these:
:unless => true group :unless => false example
:unless => false group :unless => false example
:unless => false group no :unless example
no :unless group :unless => false example
no :unless group no :unless example
And
the output should not contain any of these:
:unless => true group :unless => true example
:unless => true group no :unless example
:unless => false group :unless => true example
no :unless group :unless => true example
Combining implicit filter with explicit inclusion filter
Given
a file named "explicit_inclusion_filter_spec.rb" with: 
RSpec.configure do |c|
  c.filter_run :focus => true
end

RSpec.describe "group with :focus", :focus => true do
  it("focused example") { }
  it("focused :if => true example", :if => true) { }
  it("focused :if => false example", :if => false) { }
  it("focused :unless => true example", :unless => true) { }
  it("focused :unless => false example", :unless => false) { }
end

RSpec.describe "group without :focus" do
  it("unfocused example") { }
  it("unfocused :if => true example", :if => true) { }
  it("unfocused :if => false example", :if => false) { }
  it("unfocused :unless => true example", :unless => true) { }
  it("unfocused :unless => false example", :unless => false) { }
end
When
I run rspec explicit_inclusion_filter_spec.rb --format doc
Then
the output should contain all of these:
focused example
focused :if => true example
focused :unless => false example
And
the output should not contain any of these:
focused :if => false example
focused :unless => true example
unfocused
Combining implicit filter with explicit exclusion filter
Given
a file named "explicit_exclusion_filter_spec.rb" with: 
RSpec.configure do |c|
  c.filter_run_excluding :broken => true
end

RSpec.describe "unbroken group" do
  it("included example") { }
  it("included :if => true example", :if => true) { }
  it("included :if => false example", :if => false) { }
  it("included :unless => true example", :unless => true) { }
  it("included :unless => false example", :unless => false) { }
end

RSpec.describe "broken group", :broken => true do
  it("excluded example") { }
  it("excluded :if => true example", :if => true) { }
  it("excluded :if => false example", :if => false) { }
  it("excluded :unless => true example", :unless => true) { }
  it("excluded :unless => false example", :unless => false) { }
end
When
I run rspec explicit_exclusion_filter_spec.rb --format doc
Then
the output should contain all of these:
included example
included :if => true example
included :unless => false example
And
the output should not contain any of these:
included :if => false example
included :unless => true example
excluded
The :if and :unless exclusions stay in effect when there are explicit inclusions
Given
a file named "if_and_unless_spec.rb" with: 
RSpec.describe "Using inclusions" do
  context "inclusion target" do
    it "is filtered out by :if", :if => false do
    end

    it 'is filtered out by :unless', :unless => true do
    end

    it 'is still run according to :if', :if => true do
    end

    it 'is still run according to :unless', :unless => false do
    end
  end
end
When
I run rspec if_and_unless_spec.rb --format doc -e 'inclusion target'
Then
the output should contain all of these:
is still run according to :if
is still run according to :unless
And
the output should not contain any of these:
is filtered out by :if
is filtered out by :unless

Last published about 5 years ago by myronmarston.