From 761a43b3f9f5e908bee0ff64ed33d517ca32a5ae Mon Sep 17 00:00:00 2001
From: Markus Schirp <mbj@schirp-dso.com>
Date: Sun, 12 May 2024 01:11:31 +0000
Subject: [PATCH] Fix coverage

---
 lib/mutant/config.rb            | 11 +++++------
 lib/mutant/expression/parser.rb |  9 ++++-----
 lib/mutant/integration/rspec.rb |  3 ++-
 3 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/lib/mutant/config.rb b/lib/mutant/config.rb
index fffdd8416..35914d66c 100644
--- a/lib/mutant/config.rb
+++ b/lib/mutant/config.rb
@@ -111,14 +111,13 @@ def self.load(cli_config:, world:)
     #
     # @return [Either<String,Config>]
     def self.load_config_file(reporter:, world:)
-      files = CANDIDATES
-        .map(&world.pathname.public_method(:new))
-        .select(&:readable?)
+      files = CANDIDATES.map(&world.pathname.public_method(:new)).select(&:readable?)
 
-      if files.one?
-        load_contents(reporter: reporter, path: files.first).fmap(&DEFAULT.public_method(:with))
-      elsif files.empty?
+      case files
+      in []
         Either::Right.new(DEFAULT)
+      in [file]
+        load_contents(reporter: reporter, path: file).fmap(&DEFAULT.public_method(:with))
       else
         Either::Left.new(MORE_THAN_ONE_CONFIG_FILE % files.join(', '))
       end
diff --git a/lib/mutant/expression/parser.rb b/lib/mutant/expression/parser.rb
index bceae1555..366caa314 100644
--- a/lib/mutant/expression/parser.rb
+++ b/lib/mutant/expression/parser.rb
@@ -15,12 +15,11 @@ class Parser
       # @return [nil]
       #   otherwise
       def call(input)
-        expressions = expressions(input)
-        case expressions.length
-        when 0
+        case expressions(input)
+        in []
           Either::Left.new("Expression: #{input.inspect} is invalid")
-        when 1
-          Either::Right.new(expressions.first)
+        in [expression]
+          Either::Right.new(expression)
         else
           Either::Left.new("Expression: #{input.inspect} is ambiguous")
         end
diff --git a/lib/mutant/integration/rspec.rb b/lib/mutant/integration/rspec.rb
index 073a8f58f..b32fe114e 100644
--- a/lib/mutant/integration/rspec.rb
+++ b/lib/mutant/integration/rspec.rb
@@ -157,6 +157,7 @@ def example_group_map
       end
       memoize :example_group_map
 
+      # mutant:disable -- 3.3 specific mutation on match.captures -> match
       def parse_metadata(metadata)
         if metadata.key?(:mutant_expression)
           expression = metadata.fetch(:mutant_expression)
@@ -167,7 +168,7 @@ def parse_metadata(metadata)
           expressions.map(&method(:parse_expression))
         else
           match = EXPRESSION_CANDIDATE.match(metadata.fetch(:full_description))
-          [parse_expression(match.captures.first) { ALL_EXPRESSION }]
+          [parse_expression(Util.one(match.captures)) { ALL_EXPRESSION }]
         end
       end