Backport(v1.16): tests: fix Hash#inspect format for Ruby HEAD (#5189)

Backport #4677

**Which issue(s) this PR fixes**: 
Fixes #

**What this PR does / why we need it**: 
Hash#inspect style was updated at

ruby/ruby@a8a0591

Since its changing, fluentd's CI fails with Ruby HEAD.
https://github.com/fluent/fluentd/actions/runs/11427054212

This patch will recognize that style changing due to pass the CI tests.

**Docs Changes**:

**Release Note**:

Signed-off-by: Shizuo Fujita <[email protected]>

Author: Watson1978

test/config/test_element.rb

@@ -282,8 +282,8 @@ def element(name = 'ROOT', arg = '', attrs = {}, elements = [], unused = nil)
       dump = <<-CONF
 name:ROOT, arg:, {\"k1\"=>\"v1\"}, [name:test, arg:ext, {\"k2\"=>\"v2\"}, []]
 CONF
-      assert_not_equal(e.to_s, e.inspect)
-      assert_equal(dump.chomp, e.inspect)
+      assert_not_equal(e.to_s, e.inspect.gsub(' => ', '=>'))
+      assert_equal(dump.chomp, e.inspect.gsub(' => ', '=>'))
     end
   end
 

test/plugin/test_filter_stdout.rb

@@ -86,12 +86,12 @@ def test_output_type_hash
       d = create_driver(CONFIG + config_element("", "", { "output_type" => "hash" }))
       etime = event_time("2016-10-07 21:09:31.012345678 UTC")
       out = capture_log(d) { filter(d, etime, {'test' => 'test'}) }
-      assert_equal "2016-10-07 21:09:31.012345678 +0000 filter.test: {\"test\"=>\"test\"}\n", out
+      assert_equal "2016-10-07 21:09:31.012345678 +0000 filter.test: {\"test\"=>\"test\"}\n", out.gsub(' => ', '=>')
 
       # NOTE: Float::NAN is not jsonable, but hash string can output it.
       d = create_driver(CONFIG + config_element("", "", { "output_type" => "hash" }))
       out = capture_log(d) { filter(d, etime, {'test' => Float::NAN}) }
-      assert_equal "2016-10-07 21:09:31.012345678 +0000 filter.test: {\"test\"=>NaN}\n", out
+      assert_equal "2016-10-07 21:09:31.012345678 +0000 filter.test: {\"test\"=>NaN}\n", out.gsub(' => ', '=>')
     end
 
     # Use include_time_key to output the message's time
@@ -172,7 +172,7 @@ def test_hash
         d = create_driver(conf)
         etime = event_time("2016-10-07 21:09:31.012345678 UTC")
         out = capture_log(d) { filter(d, etime, {'test' => 'test'}) }
-        assert_equal "2016-10-07 21:09:31.012345678 +0000 filter.test: {\"test\"=>\"test\"}\n", out
+        assert_equal "2016-10-07 21:09:31.012345678 +0000 filter.test: {\"test\"=>\"test\"}\n", out.gsub(' => ', '=>')
       end
 
       def test_hash_nan
@@ -182,7 +182,7 @@ def test_hash_nan
         d = create_driver(conf)
         etime = event_time("2016-10-07 21:09:31.012345678 UTC")
         out = capture_log(d) { filter(d, etime, {'test' => Float::NAN}) }
-        assert_equal "2016-10-07 21:09:31.012345678 +0000 filter.test: {\"test\"=>NaN}\n", out
+        assert_equal "2016-10-07 21:09:31.012345678 +0000 filter.test: {\"test\"=>NaN}\n", out.gsub(' => ', '=>')
       end
 
       # Use include_time_key to output the message's time

test/plugin/test_formatter_hash.rb

@@ -26,13 +26,13 @@ def test_format(data)
     d = create_driver({"newline" => newline_conf})
     formatted = d.instance.format(tag, @time, record)
 
-    assert_equal(%Q!{"message"=>"awesome", "greeting"=>"hello"}#{newline}!, formatted.encode(Encoding::UTF_8))
+    assert_equal(%Q!{"message"=>"awesome", "greeting"=>"hello"}#{newline}!, formatted.gsub(' => ', '=>').encode(Encoding::UTF_8))
   end
 
   def test_format_without_newline
     d = create_driver('add_newline' => false)
     formatted = d.instance.format(tag, @time, record)
 
-    assert_equal(%Q!{"message"=>"awesome", "greeting"=>"hello"}!, formatted.encode(Encoding::UTF_8))
+    assert_equal(%Q!{"message"=>"awesome", "greeting"=>"hello"}!, formatted.gsub(' => ', '=>').encode(Encoding::UTF_8))
   end
 end

test/plugin/test_out_stdout.rb

@@ -95,11 +95,11 @@ def create_driver(conf = CONFIG)
           d.feed(time, {'test' => 'test2'})
         end
       end
-      assert_equal "#{Time.at(time).localtime.strftime(TIME_FORMAT)} test: {\"test\"=>\"test2\"}\n", out
+      assert_equal "#{Time.at(time).localtime.strftime(TIME_FORMAT)} test: {\"test\"=>\"test2\"}\n", out.gsub(' => ', '=>')
 
       # NOTE: Float::NAN is not jsonable, but hash string can output it.
       out = capture_log { d.feed('test', time, {'test' => Float::NAN}) }
-      assert_equal "#{Time.at(time).localtime.strftime(TIME_FORMAT)} test: {\"test\"=>NaN}\n", out
+      assert_equal "#{Time.at(time).localtime.strftime(TIME_FORMAT)} test: {\"test\"=>NaN}\n", out.gsub(' => ', '=>')
     end
   end
 
@@ -171,7 +171,7 @@ def create_driver(conf = CONFIG)
           end
         end
 
-        assert_equal "#{Time.at(time).localtime.strftime(TIME_FORMAT)} test: {\"test\"=>\"test\"}\n", out
+        assert_equal "#{Time.at(time).localtime.strftime(TIME_FORMAT)} test: {\"test\"=>\"test\"}\n", out.gsub(' => ', '=>')
       end
     end
   end