fix: add condition flow for minitest (#748)

* add condition flow

* add comments

* add changelog

* add test cases

Author: KazuCocoa

CHANGELOG.md

@@ -7,6 +7,7 @@ Release tags are https://github.com/appium/ruby_lib/releases .
 ### 1. Enhancements
 
 ### 2. Bug fixes
+- Fix `TypeError: superclass mismatch for class Test` for minitest `5.11.0`+ [PR](https://github.com/appium/ruby_lib/pull/748)
 
 ### 3. Deprecations
 

ios_tests/lib/ios/specs/driver.rb

@@ -12,6 +12,14 @@ def sauce?
     ENV['UPLOAD_FILE'] && ENV['SAUCE_USERNAME']
   end
 
+  t 'left_greater_than_or_equal_to_right?' do
+    assert Minitest.left_greater_than_or_equal_to_right? '5.11.1', '5.11.0'
+    assert Minitest.left_greater_than_or_equal_to_right? '5.11.0', '5.11.0'
+    assert !Minitest.left_greater_than_or_equal_to_right?('5.10.1', '5.11.0')
+    assert !Minitest.left_greater_than_or_equal_to_right?('5.10.0', '5.11.0')
+    assert !Minitest.left_greater_than_or_equal_to_right?('4.10.0', '5.11.0')
+  end
+
   t 'unicode defaults' do
     data = File.read File.expand_path '../../../../data/unicode.txt', __FILE__
     data.strip.must_equal 174.chr('UTF-8')

lib/appium_lib/driver.rb

@@ -3,7 +3,25 @@ module Minitest
   # Fix superclass mismatch for class Spec
   class Runnable
   end
-  class Test < Runnable
+
+  # To switch load class
+  def self.left_greater_than_or_equal_to_right?(left, right)
+    left.split('.').zip(right.split('.')).each do |value|
+      diff = value[0].to_i - value[1].to_i
+      return true if diff > 0
+      return false if diff < 0
+    end
+    true
+  end
+
+  if left_greater_than_or_equal_to_right?(VERSION, '5.11.0')
+    # http://docs.seattlerb.org/minitest/History_rdoc.html#label-5.11.0+-2F+2018-01-01
+    # `Minitest::Test` became a subclass of `Minitest::Result`
+    class Test < Result
+    end
+  else
+    class Test < Runnable
+    end
   end
   class Spec < Test
   end