Add new RSpec/IsExpectedSpecify cop

Fix: rubocop/rubocop-rspec#1658

Author: ydah

.rubocop.yml

@@ -165,6 +165,8 @@ RSpec/IdenticalEqualityAssertion:
   Enabled: true
 RSpec/IndexedLet:
   Enabled: true
+RSpec/IsExpectedSpecify:
+  Enabled: true
 RSpec/MatchArray:
   Enabled: true
 RSpec/MetadataStyle:

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Master (Unreleased)
 
+- Add new `RSpec/IsExpectedSpecify` cop. ([@ydah])
 - Add support for `assert_true` and `assert_false` to `RSpec/Rails/MinitestAssertions`. ([@ydah])
 - Support asserts with messages in `Rspec/BeEmpty`. ([@G-Rath])
 - Add support for `assert_empty`, `assert_not_empty` and `refute_empty` to `RSpec/Rails/MinitestAssertions`. ([@ydah])

config/default.yml

@@ -548,6 +548,13 @@ RSpec/InstanceVariable:
   StyleGuide: https://rspec.rubystyle.guide/#instance-variables
   Reference: https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/InstanceVariable
 
+RSpec/IsExpectedSpecify:
+  Description: Check for `specify` with `is_expected` and one-liner expectations.
+  Enabled: pending
+  VersionAdded: "<<next>>"
+  StyleGuide: https://rspec.rubystyle.guide/#it-and-specify
+  Reference: https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/IsExpectedSpecify
+
 RSpec/ItBehavesLike:
   Description: Checks that only one `it_behaves_like` style is used.
   Enabled: true

docs/modules/ROOT/pages/cops.adoc

@@ -52,6 +52,7 @@
 * xref:cops_rspec.adoc#rspecindexedlet[RSpec/IndexedLet]
 * xref:cops_rspec.adoc#rspecinstancespy[RSpec/InstanceSpy]
 * xref:cops_rspec.adoc#rspecinstancevariable[RSpec/InstanceVariable]
+* xref:cops_rspec.adoc#rspecisexpectedspecify[RSpec/IsExpectedSpecify]
 * xref:cops_rspec.adoc#rspecitbehaveslike[RSpec/ItBehavesLike]
 * xref:cops_rspec.adoc#rspeciteratedexpectation[RSpec/IteratedExpectation]
 * xref:cops_rspec.adoc#rspecleadingsubject[RSpec/LeadingSubject]

lib/rubocop/cop/rspec_rails_cops.rb

@@ -78,6 +78,7 @@
 require_relative 'rspec/indexed_let'
 require_relative 'rspec/instance_spy'
 require_relative 'rspec/instance_variable'
+require_relative 'rspec/is_expected_specify'
 require_relative 'rspec/it_behaves_like'
 require_relative 'rspec/iterated_expectation'
 require_relative 'rspec/leading_subject'