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

WrongScopeError =

Raised when an RSpec API is called in the wrong scope, such as before being called from within an example rather than from within an example group block.

Class.new(NoMethodError)

Metadata collapse

Defining Examples collapse

Defining Example Groups collapse

Including Shared Example Groups collapse

Class Method Summary collapse

Instance 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

Constructor Details

#initialize(inspect_output = nil) ⇒ ExampleGroup



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# File 'lib/rspec/core/example_group.rb', line 617

def initialize(inspect_output=nil)
  @__inspect_output = inspect_output || '(no description provided)'
  super() # no args get passed
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ void (private)



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# File 'lib/rspec/core/example_group.rb', line 657

def method_missing(name, *args)
  if self.class.respond_to?(name)
    raise WrongScopeError,
          "`#{name}` is not available from within an example (e.g. an " \
          "`it` block) or from constructs that run in the scope of an " \
          "example (e.g. `before`, `let`, etc). It is only available " \
          "on an example group (e.g. a `describe` or `context` block)."
  end

  super
end

Class Method Details

.contextvoid .context(&example_group_definition) ⇒ void .context(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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

See Also:



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# File 'lib/rspec/core/example_group.rb', line 276

define_example_group_method :context

.describevoid .describe(&example_group_definition) ⇒ void .describe(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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

See Also:



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# File 'lib/rspec/core/example_group.rb', line 271

define_example_group_method :describe

.descriptionString



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

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

.examplevoid .example(&example_implementation) ⇒ void .example(doc_string, *metadata_keys, metadata = {}) ⇒ void .example(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

Defines an example within a group.

Examples:

example do
end

example "does something" do
end

example "does something", :slow, :uses_js 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 152

define_example_method :example

.example_groupvoid .example_group(&example_group_definition) ⇒ void .example_group(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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


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# File 'lib/rspec/core/example_group.rb', line 266

define_example_group_method :example_group

.fcontextvoid .fcontext(&example_group_definition) ⇒ void .fcontext(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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

See Also:



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# File 'lib/rspec/core/example_group.rb', line 292

define_example_group_method :fcontext,  :focus => true

.fdescribevoid .fdescribe(&example_group_definition) ⇒ void .fdescribe(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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

See Also:



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# File 'lib/rspec/core/example_group.rb', line 288

define_example_group_method :fdescribe, :focus => true

.fexamplevoid .fexample(&example_implementation) ⇒ void .fexample(doc_string, *metadata_keys, metadata = {}) ⇒ void .fexample(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

Shortcut to define an example with :focus => true.

Examples:

fexample do
end

fexample "does something" do
end

fexample "does something", :slow, :uses_js 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 171

define_example_method :fexample, :focus => true

.fitvoid .fit(&example_implementation) ⇒ void .fit(doc_string, *metadata_keys, metadata = {}) ⇒ void .fit(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

Shortcut to define an example with :focus => true.

Examples:

fit do
end

fit "does something" do
end

fit "does something", :slow, :uses_js 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 174

define_example_method :fit,      :focus => true

.focusvoid .focus(&example_implementation) ⇒ void .focus(doc_string, *metadata_keys, metadata = {}) ⇒ void .focus(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

Shortcut to define an example with :focus => true.

Examples:

focus do
end

focus "does something" do
end

focus "does something", :slow, :uses_js 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 168

define_example_method :focus,    :focus => true

.fspecifyvoid .fspecify(&example_implementation) ⇒ void .fspecify(doc_string, *metadata_keys, metadata = {}) ⇒ void .fspecify(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

Shortcut to define an example with :focus => true.

Examples:

fspecify do
end

fspecify "does something" do
end

fspecify "does something", :slow, :uses_js 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 177

define_example_method :fspecify, :focus => true

.idString



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# File 'lib/rspec/core/example_group.rb', line 586

def self.id
  .id_from()
end

.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 329

def self.include_context(name, *args, &block)
  find_and_eval_shared("context", name, caller.first, *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 339

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

.itvoid .it(&example_implementation) ⇒ void .it(doc_string, *metadata_keys, metadata = {}) ⇒ void .it(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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", :slow, :uses_js 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 155

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 318

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 321

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 47

def self.
   ||= nil
end

.pendingvoid .pending(&example_implementation) ⇒ void .pending(doc_string, *metadata_keys, metadata = {}) ⇒ void .pending(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

Shortcut to define an example with :pending => true

Examples:

pending do
end

pending "does something" do
end

pending "does something", :slow, :uses_js 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:



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# File 'lib/rspec/core/example_group.rb', line 192

define_example_method :pending,  :pending => true

.run(reporter = RSpec::Core::NullReporter) ⇒ void

Runs all the examples in this group.



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# File 'lib/rspec/core/example_group.rb', line 509

def self.run(reporter=RSpec::Core::NullReporter)
  return if RSpec.world.wants_to_quit
  reporter.example_group_started(self)

  should_run_context_hooks = descendant_filtered_examples.any?
  begin
    run_before_context_hooks(new('before(:context) hook')) if should_run_context_hooks
    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) }
    true
  rescue Exception => ex
    RSpec.world.wants_to_quit = true if fail_fast?
    for_filtered_examples(reporter) { |example| example.fail_with_exception(reporter, ex) }
    false
  ensure
    run_after_context_hooks(new('after(:context) hook')) if should_run_context_hooks
    reporter.example_group_finished(self)
  end
end

.skipvoid .skip(&example_implementation) ⇒ void .skip(doc_string, *metadata_keys, metadata = {}) ⇒ void .skip(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

Shortcut to define an example with :skip => true

Examples:

skip do
end

skip "does something" do
end

skip "does something", :slow, :uses_js 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:



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# File 'lib/rspec/core/example_group.rb', line 189

define_example_method :skip,     :skip => true

.specifyvoid .specify(&example_implementation) ⇒ void .specify(doc_string, *metadata_keys, metadata = {}) ⇒ void .specify(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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", :slow, :uses_js 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 164

define_example_method :specify

.xcontextvoid .xcontext(&example_group_definition) ⇒ void .xcontext(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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

See Also:



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# File 'lib/rspec/core/example_group.rb', line 284

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

.xdescribevoid .xdescribe(&example_group_definition) ⇒ void .xdescribe(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ 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

See Also:



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# File 'lib/rspec/core/example_group.rb', line 280

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

.xexamplevoid .xexample(&example_implementation) ⇒ void .xexample(doc_string, *metadata_keys, metadata = {}) ⇒ void .xexample(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

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

Examples:

xexample do
end

xexample "does something" do
end

xexample "does something", :slow, :uses_js 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 180

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

.xitvoid .xit(&example_implementation) ⇒ void .xit(doc_string, *metadata_keys, metadata = {}) ⇒ void .xit(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

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

Examples:

xit do
end

xit "does something" do
end

xit "does something", :slow, :uses_js 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 183

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

.xspecifyvoid .xspecify(&example_implementation) ⇒ void .xspecify(doc_string, *metadata_keys, metadata = {}) ⇒ void .xspecify(doc_string, *metadata_keys, metadata = {}, &example_implementation) ⇒ void

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

Examples:

xspecify do
end

xspecify "does something" do
end

xspecify "does something", :slow, :uses_js 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 186

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 95

def described_class
  self.class.described_class
end