Class: RSpec::Core::ExampleGroup

Inherits:
Object
  • Object
show all
Extended by:
Hooks, MemoizedHelpers::ClassMethods, SharedExampleGroup
Includes:
MemoizedHelpers, Pending
Defined in:
lib/rspec/core/example_group.rb

Overview

ExampleGroup and Example are the main structural elements of rspec-core. Consider this example:

describe Thing do
  it "does something" do
  end
end

The object returned by describe Thing is a subclass of ExampleGroup. The object returned by it "does something" is an instance of Example, which serves as a wrapper for an instance of the ExampleGroup in which it is declared.

Example group bodies (e.g. describe or context blocks) are evaluated in the context of a new subclass of ExampleGroup. Individual examples are evaluated in the context of an instance of the specific ExampleGroup subclass to which they belong.

Besides the class methods defined here, there are other interesting macros defined in Hooks, MemoizedHelpers::ClassMethods and SharedExampleGroup. There are additional instance methods available to your examples defined in MemoizedHelpers and Pending.

Constant Summary

Metadata collapse

Defining Examples collapse

Defining Example Groups collapse

Including Shared Example Groups collapse

Class Method Summary collapse

Methods included from SharedExampleGroup

shared_examples

Methods included from MemoizedHelpers::ClassMethods

let, let!, subject, subject!

Methods included from Hooks

after, append_after, around, before, prepend_before

Methods included from Pending

#pending, #skip

Methods included from MemoizedHelpers

#is_expected, #should, #should_not, #subject

Class Method Details

.context { ... } ⇒ void

An alias of example_group. Generally used when grouping examples contextually (e.g. "with xyz", "when xyz" or "if xyz"). Generates a subclass of this example group which inherits everything except the examples themselves.

Examples:


RSpec.describe "something" do # << This describe method is defined in
                              # << RSpec::Core::DSL, included in the
                              # << global namespace (optional)
  before do
    do_something_before
  end

  let(:thing) { Thing.new }

  context "attribute (of something)" do
    # examples in the group get the before hook
    # declared above, and can access `thing`
  end
end

Yields:

  • The example group definition

See Also:



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# File 'lib/rspec/core/example_group.rb', line 241

define_example_group_method :context

.describe { ... } ⇒ void

An alias of example_group. Generally used when grouping examples by a thing you are describing (e.g. an object, class or method). Generates a subclass of this example group which inherits everything except the examples themselves.

Examples:


RSpec.describe "something" do # << This describe method is defined in
                              # << RSpec::Core::DSL, included in the
                              # << global namespace (optional)
  before do
    do_something_before
  end

  let(:thing) { Thing.new }

  describe "attribute (of something)" do
    # examples in the group get the before hook
    # declared above, and can access `thing`
  end
end

Yields:

  • The example group definition

See Also:



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# File 'lib/rspec/core/example_group.rb', line 236

define_example_group_method :describe

.descriptionString



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# File 'lib/rspec/core/example_group.rb', line 66

def self.description
  description = [:description]
  RSpec.configuration.format_docstrings_block.call(description)
end

.example {|Example| ... } ⇒ void

Defines an example within a group.

Examples:

example do
end

example "does something" do
end

example "does something", :with => 'additional metadata' do
end

example "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:



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# File 'lib/rspec/core/example_group.rb', line 123

define_example_method :example

.example_group { ... } ⇒ void

Generates a subclass of this example group which inherits everything except the examples themselves.

Examples:


RSpec.describe "something" do # << This describe method is defined in
                              # << RSpec::Core::DSL, included in the
                              # << global namespace (optional)
  before do
    do_something_before
  end

  let(:thing) { Thing.new }

  example_group "attribute (of something)" do
    # examples in the group get the before hook
    # declared above, and can access `thing`
  end
end

Yields:

  • The example group definition



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# File 'lib/rspec/core/example_group.rb', line 231

define_example_group_method :example_group

.fcontext { ... } ⇒ void

Shortcut to define an example group with :focus => true. Generates a subclass of this example group which inherits everything except the examples themselves.

Examples:


RSpec.describe "something" do # << This describe method is defined in
                              # << RSpec::Core::DSL, included in the
                              # << global namespace (optional)
  before do
    do_something_before
  end

  let(:thing) { Thing.new }

  fcontext "attribute (of something)" do
    # examples in the group get the before hook
    # declared above, and can access `thing`
  end
end

Yields:

  • The example group definition

See Also:



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# File 'lib/rspec/core/example_group.rb', line 257

define_example_group_method :fcontext,  :focus => true

.fdescribe { ... } ⇒ void

Shortcut to define an example group with :focus => true. Generates a subclass of this example group which inherits everything except the examples themselves.

Examples:


RSpec.describe "something" do # << This describe method is defined in
                              # << RSpec::Core::DSL, included in the
                              # << global namespace (optional)
  before do
    do_something_before
  end

  let(:thing) { Thing.new }

  fdescribe "attribute (of something)" do
    # examples in the group get the before hook
    # declared above, and can access `thing`
  end
end

Yields:

  • The example group definition

See Also:



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# File 'lib/rspec/core/example_group.rb', line 253

define_example_group_method :fdescribe, :focus => true

.fexample {|Example| ... } ⇒ void

Shortcut to define an example with :focus => true

Examples:

fexample do
end

fexample "does something" do
end

fexample "does something", :with => 'additional metadata' do
end

fexample "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



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# File 'lib/rspec/core/example_group.rb', line 142

define_example_method :fexample, :focus => true

.fit {|Example| ... } ⇒ void

Shortcut to define an example with :focus => true

Examples:

fit do
end

fit "does something" do
end

fit "does something", :with => 'additional metadata' do
end

fit "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



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# File 'lib/rspec/core/example_group.rb', line 145

define_example_method :fit,      :focus => true

.focus {|Example| ... } ⇒ void

Shortcut to define an example with :focus => true

Examples:

focus do
end

focus "does something" do
end

focus "does something", :with => 'additional metadata' do
end

focus "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



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# File 'lib/rspec/core/example_group.rb', line 139

define_example_method :focus,    :focus => true

.fspecify {|Example| ... } ⇒ void

Shortcut to define an example with :focus => true

Examples:

fspecify do
end

fspecify "does something" do
end

fspecify "does something", :with => 'additional metadata' do
end

fspecify "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



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# File 'lib/rspec/core/example_group.rb', line 148

define_example_method :fspecify, :focus => true

.include_context(name, *args, &block) ⇒ void

Includes shared content mapped to name directly in the group in which it is declared, as opposed to it_behaves_like, which creates a nested group. If given a block, that block is also eval'd in the current context.

See Also:



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# File 'lib/rspec/core/example_group.rb', line 293

def self.include_context(name, *args, &block)
  find_and_eval_shared("context", name, *args, &block)
end

.include_examples(name, *args, &block) ⇒ void

Includes shared content mapped to name directly in the group in which it is declared, as opposed to it_behaves_like, which creates a nested group. If given a block, that block is also eval'd in the current context.

See Also:



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# File 'lib/rspec/core/example_group.rb', line 302

def self.include_examples(name, *args, &block)
  find_and_eval_shared("examples", name, *args, &block)
end

.it {|Example| ... } ⇒ void

Defines an example within a group. This is the primary API to define a code example.

Examples:

it do
end

it "does something" do
end

it "does something", :with => 'additional metadata' do
end

it "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:



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# File 'lib/rspec/core/example_group.rb', line 126

define_example_method :it

.it_behaves_likevoid

Generates a nested example group and includes the shared content mapped to name in the nested group.

See Also:



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# File 'lib/rspec/core/example_group.rb', line 283

define_nested_shared_group_method :it_behaves_like, "behaves like"

.it_should_behave_likevoid

Generates a nested example group and includes the shared content mapped to name in the nested group.

See Also:



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# File 'lib/rspec/core/example_group.rb', line 286

define_nested_shared_group_method :it_should_behave_like

.metadatavoid

The Metadata object associated with this group.

See Also:



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# File 'lib/rspec/core/example_group.rb', line 46

def self.
  @metadata if defined?(@metadata)
end

.pending {|Example| ... } ⇒ void

Shortcut to define an example with :pending => true

Examples:

pending do
end

pending "does something" do
end

pending "does something", :with => 'additional metadata' do
end

pending "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



163
# File 'lib/rspec/core/example_group.rb', line 163

define_example_method :pending,  :pending => true

.run(reporter) ⇒ void

Runs all the examples in this group



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# File 'lib/rspec/core/example_group.rb', line 444

def self.run(reporter)
  if RSpec.world.wants_to_quit
    RSpec.world.clear_remaining_example_groups if top_level?
    return
  end
  reporter.example_group_started(self)

  begin
    run_before_context_hooks(new)
    result_for_this_group = run_examples(reporter)
    results_for_descendants = ordering_strategy.order(children).map { |child| child.run(reporter) }.all?
    result_for_this_group && results_for_descendants
  rescue Pending::SkipDeclaredInExample => ex
    for_filtered_examples(reporter) { |example| example.skip_with_exception(reporter, ex) }
  rescue Exception => ex
    RSpec.world.wants_to_quit = true if fail_fast?
    for_filtered_examples(reporter) { |example| example.fail_with_exception(reporter, ex) }
  ensure
    run_after_context_hooks(new)
    before_context_ivars.clear
    reporter.example_group_finished(self)
  end
end

.skip {|Example| ... } ⇒ void

Shortcut to define an example with :skip => true

Examples:

skip do
end

skip "does something" do
end

skip "does something", :with => 'additional metadata' do
end

skip "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



160
# File 'lib/rspec/core/example_group.rb', line 160

define_example_method :skip,     :skip => true

.specify {|Example| ... } ⇒ void

Defines an example within a group. Useful for when your docstring does not read well off of it.

Examples:

RSpec.describe MyClass do
  specify "#do_something is deprecated" do
    # ...
  end
end
specify do
end

specify "does something" do
end

specify "does something", :with => 'additional metadata' do
end

specify "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:



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# File 'lib/rspec/core/example_group.rb', line 135

define_example_method :specify

.xcontext { ... } ⇒ void

Shortcut to temporarily make an example group skipped. Generates a subclass of this example group which inherits everything except the examples themselves.

Examples:


RSpec.describe "something" do # << This describe method is defined in
                              # << RSpec::Core::DSL, included in the
                              # << global namespace (optional)
  before do
    do_something_before
  end

  let(:thing) { Thing.new }

  xcontext "attribute (of something)" do
    # examples in the group get the before hook
    # declared above, and can access `thing`
  end
end

Yields:

  • The example group definition

See Also:



249
# File 'lib/rspec/core/example_group.rb', line 249

define_example_group_method :xcontext,  :skip => "Temporarily skipped with xcontext"

.xdescribe { ... } ⇒ void

Shortcut to temporarily make an example group skipped. Generates a subclass of this example group which inherits everything except the examples themselves.

Examples:


RSpec.describe "something" do # << This describe method is defined in
                              # << RSpec::Core::DSL, included in the
                              # << global namespace (optional)
  before do
    do_something_before
  end

  let(:thing) { Thing.new }

  xdescribe "attribute (of something)" do
    # examples in the group get the before hook
    # declared above, and can access `thing`
  end
end

Yields:

  • The example group definition

See Also:



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# File 'lib/rspec/core/example_group.rb', line 245

define_example_group_method :xdescribe, :skip => "Temporarily skipped with xdescribe"

.xexample {|Example| ... } ⇒ void

Shortcut to define an example with :skip => 'Temporarily skipped with xexample'

Examples:

xexample do
end

xexample "does something" do
end

xexample "does something", :with => 'additional metadata' do
end

xexample "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



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# File 'lib/rspec/core/example_group.rb', line 151

define_example_method :xexample, :skip => 'Temporarily skipped with xexample'

.xit {|Example| ... } ⇒ void

Shortcut to define an example with :skip => 'Temporarily skipped with xit'

Examples:

xit do
end

xit "does something" do
end

xit "does something", :with => 'additional metadata' do
end

xit "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



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# File 'lib/rspec/core/example_group.rb', line 154

define_example_method :xit,      :skip => 'Temporarily skipped with xit'

.xspecify {|Example| ... } ⇒ void

Shortcut to define an example with :skip => 'Temporarily skipped with xspecify'

Examples:

xspecify do
end

xspecify "does something" do
end

xspecify "does something", :with => 'additional metadata' do
end

xspecify "does something" do |ex|
  # ex is the Example object that contains metadata about the example
end

Yields:

See Also:



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# File 'lib/rspec/core/example_group.rb', line 157

define_example_method :xspecify, :skip => 'Temporarily skipped with xspecify'

Instance Method Details

#described_classvoid

Returns the class or module passed to the describe method (or alias). Returns nil if the subject is not a class or module.

Examples:

describe Thing do
  it "does something" do
    described_class == Thing
  end
end


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# File 'lib/rspec/core/example_group.rb', line 81

def described_class
  self.class.described_class
end