test: Resolve Truffle ruby intermittent failures on exporters (#1752)

* test: Use Zlib.gunzip to compare body with estr

Zlib.gzip adds a timestamp, which may be different than the one in the
encoded req.body due to the test timing, and may cause an intermittent
failure. Compare the unzipped request with the encoded_estr to avoid
the timestamp interfering with the equality check.

Co-authored-by: Tanna McClure <tannalynn@users.noreply.github.com>

* test: Remove skip for TruffleRuby

The assertions in this test differ from the other intermittent failures.
Hopefully, the test is not failing and was skipped because the name
of the test is the same as others.

* chore: Remove comment

---------

Co-authored-by: Tanna McClure <tannalynn@users.noreply.github.com>

exporter/otlp-common/test/opentelemetry/exporter/otlp/common/common_test.rb

@@ -41,9 +41,6 @@
     end
 
     it 'translates all the things' do
-      # TODO: See issue #1507 to fix
-      skip 'Intermittently fails' if RUBY_ENGINE == 'truffleruby'
-
       OpenTelemetry.tracer_provider = OpenTelemetry::SDK::Trace::TracerProvider.new(resource: OpenTelemetry::SDK::Resources::Resource.telemetry_sdk)
       tracer = OpenTelemetry.tracer_provider.tracer('tracer', 'v0.0.1')
       other_tracer = OpenTelemetry.tracer_provider.tracer('other_tracer')

exporter/otlp-http/test/opentelemetry/exporter/otlp/http/trace_exporter_test.rb

@@ -468,9 +468,6 @@
     end
 
     it 'translates all the things' do
-      # TODO: See issue #1507 to fix
-      skip 'Intermittently fails' if RUBY_ENGINE == 'truffleruby'
-
       stub_request(:post, 'http://localhost:4318/v1/traces').to_return(status: 200)
       processor = OpenTelemetry::SDK::Trace::Export::BatchSpanProcessor.new(exporter)
       tracer = OpenTelemetry.tracer_provider.tracer('tracer', 'v0.0.1')
@@ -635,7 +632,7 @@
       )
 
       assert_requested(:post, 'http://localhost:4318/v1/traces') do |req|
-        req.body == Zlib.gzip(encoded_etsr)
+        Zlib.gunzip(req.body) == encoded_etsr
       end
     end
   end

exporter/otlp-metrics/test/opentelemetry/exporter/otlp/metrics/metrics_exporter_test.rb

@@ -556,8 +556,6 @@
     end
 
     it 'translates all the things' do
-      skip 'Intermittently fails' if RUBY_ENGINE == 'truffleruby'
-
       stub_request(:post, 'http://localhost:4318/v1/metrics').to_return(status: 200)
       meter_provider.add_metric_reader(exporter)
       meter   = meter_provider.meter('test')
@@ -639,7 +637,7 @@
       )
 
       assert_requested(:post, 'http://localhost:4318/v1/metrics') do |req|
-        req.body == Zlib.gzip(encoded_etsr) # is asserting that the body of the HTTP request is equal to the result of gzipping the encoded_etsr.
+        Zlib.gunzip(req.body) == encoded_etsr
       end
     end
   end

exporter/otlp/test/opentelemetry/exporter/otlp/exporter_test.rb

@@ -611,9 +611,6 @@
     end
 
     it 'translates all the things' do
-      # TODO: See issue #1507 to fix
-      skip 'Intermittently fails' if RUBY_ENGINE == 'truffleruby'
-
       stub_request(:post, 'http://localhost:4318/v1/traces').to_return(status: 200)
       processor = OpenTelemetry::SDK::Trace::Export::BatchSpanProcessor.new(exporter)
       tracer = OpenTelemetry.tracer_provider.tracer('tracer', 'v0.0.1')
@@ -778,7 +775,7 @@
       )
 
       assert_requested(:post, 'http://localhost:4318/v1/traces') do |req|
-        req.body == Zlib.gzip(encoded_etsr)
+        Zlib.gunzip(req.body) == encoded_etsr
       end
     end
   end