1 files changed, 74 insertions, 0 deletions
diff --git a/spec/rubocop/cop/avoid_break_from_strong_memoize_spec.rb b/spec/rubocop/cop/avoid_break_from_strong_memoize_spec.rb
new file mode 100644
index 00000000000..ac7b1575ec0
--- /dev/null
+++ b/spec/rubocop/cop/avoid_break_from_strong_memoize_spec.rb
@@ -0,0 +1,74 @@
+require 'spec_helper'
+require 'rubocop'
+require 'rubocop/rspec/support'
+require_relative '../../../rubocop/cop/avoid_break_from_strong_memoize'
+
+describe RuboCop::Cop::AvoidBreakFromStrongMemoize do
+  include CopHelper
+
+  subject(:cop) { described_class.new }
+
+  it 'flags violation for break inside strong_memoize' do
+    expect_offense(<<~RUBY)
+      strong_memoize(:result) do
+        break if something
+        ^^^^^ Do not use break inside strong_memoize, use next instead.
+
+        do_an_heavy_calculation
+      end
+    RUBY
+  end
+
+  it 'flags violation for break inside strong_memoize nested blocks' do
+    expect_offense(<<~RUBY)
+      strong_memoize do
+        items.each do |item|
+          break item
+          ^^^^^^^^^^ Do not use break inside strong_memoize, use next instead.
+        end
+      end
+    RUBY
+  end
+
+  it "doesn't flag violation for next inside strong_memoize" do
+    expect_no_offenses(<<~RUBY)
+      strong_memoize(:result) do
+        next if something
+
+        do_an_heavy_calculation
+      end
+    RUBY
+  end
+
+  it "doesn't flag violation for break inside blocks" do
+    expect_no_offenses(<<~RUBY)
+      call do
+        break if something
+
+        do_an_heavy_calculation
+      end
+    RUBY
+  end
+
+  it "doesn't call add_offense twice for nested blocks" do
+    source = <<~RUBY
+      call do
+        strong_memoize(:result) do
+          break if something
+
+          do_an_heavy_calculation
+        end
+      end
+    RUBY
+    expect_any_instance_of(described_class).to receive(:add_offense).once
+
+    inspect_source(source)
+  end
+
+  it "doesn't check when block is empty" do
+    expect_no_offenses(<<~RUBY)
+      strong_memoize(:result) do
+      end
+    RUBY
+  end
+end