Fixed tests

- $CHILD_STATUS could not be mocked, so extracted to class

lib/clamby/command.rb

@@ -12,6 +12,11 @@ def self.scan_executable
       return 'clamscan'
     end
 
+    # $CHILD_STATUS maybe nil if the execution itself (not the client process)
+    def self.scan_status
+      $CHILD_STATUS && $CHILD_STATUS.exitstatus
+    end
+
     # Perform a ClamAV scan on the given path.
     def self.scan(path)
       return nil unless file_exists?(path)
@@ -28,10 +33,7 @@ def self.scan(path)
 
       new.run scan_executable, *args
 
-      # $CHILD_STATUS maybe nil if the execution itself (not the client process)
-      # fails
-      child_status = $CHILD_STATUS.dup # $CHILD_STATUS in Ruby 3.0+ is frozen
-      case child_status && child_status.exitstatus
+      case self.scan_status
       when 0
         return false
       when nil, 2

lib/clamby/version.rb

@@ -1,3 +1,3 @@
 module Clamby
-  VERSION = "1.6.10"
+  VERSION = "1.6.11"
 end

spec/clamby_spec.rb

@@ -94,7 +94,10 @@
     }
 
     context 'when false' do
-      before { Clamby.configure(error_clamscan_client_error: false) }
+      before do
+        Clamby.configure(error_clamscan_client_error: false)
+        allow(Clamby::Command).to receive(:scan_status).and_return(2)
+      end
 
       it 'virus? returns true when the daemonized client exits with status 2' do
         Clamby.configure(daemonize: true)
@@ -107,7 +110,10 @@
     end
 
     context 'when true' do
-      before { Clamby.configure(error_clamscan_client_error: true) }
+      before do
+        Clamby.configure(error_clamscan_client_error: true)
+        allow(Clamby::Command).to receive(:scan_status).and_return(2)
+      end
 
       it 'virus? raises when the daemonized client exits with status 2' do
         Clamby.configure(daemonize: true)