skip forking tests on windows and java platforms

Author: chrisholmes

metrics_sdk/test/integration/periodic_metric_reader_test.rb

@@ -83,42 +83,44 @@
       _(periodic_metric_reader.instance_variable_get(:@thread).alive?).must_equal false
     end
 
-    it 'is restarted after forking' do
-      OpenTelemetry::SDK.configure
+    unless Gem.win_platform? || Gem.java_platform? # skip as forking is not available on these platforms
+      it 'is restarted after forking' do
+        OpenTelemetry::SDK.configure
 
-      metric_exporter = OpenTelemetry::SDK::Metrics::Export::InMemoryMetricPullExporter.new
-      periodic_metric_reader = OpenTelemetry::SDK::Metrics::Export::PeriodicMetricReader.new(export_interval_millis: 5000, export_timeout_millis: 5000, exporter: metric_exporter)
+        metric_exporter = OpenTelemetry::SDK::Metrics::Export::InMemoryMetricPullExporter.new
+        periodic_metric_reader = OpenTelemetry::SDK::Metrics::Export::PeriodicMetricReader.new(export_interval_millis: 5000, export_timeout_millis: 5000, exporter: metric_exporter)
 
-      OpenTelemetry.meter_provider.add_metric_reader(periodic_metric_reader)
+        OpenTelemetry.meter_provider.add_metric_reader(periodic_metric_reader)
 
-      read, write = IO.pipe
+        read, write = IO.pipe
 
-      pid = fork do
-        meter = OpenTelemetry.meter_provider.meter('test')
-        counter = meter.create_counter('counter', unit: 'smidgen', description: 'a small amount of something')
+        pid = fork do
+          meter = OpenTelemetry.meter_provider.meter('test')
+          counter = meter.create_counter('counter', unit: 'smidgen', description: 'a small amount of something')
 
-        counter.add(1)
-        counter.add(2, attributes: { 'a' => 'b' })
-        counter.add(2, attributes: { 'a' => 'b' })
-        counter.add(3, attributes: { 'b' => 'c' })
-        counter.add(4, attributes: { 'd' => 'e' })
+          counter.add(1)
+          counter.add(2, attributes: { 'a' => 'b' })
+          counter.add(2, attributes: { 'a' => 'b' })
+          counter.add(3, attributes: { 'b' => 'c' })
+          counter.add(4, attributes: { 'd' => 'e' })
 
-        sleep(8)
-        snapshot = metric_exporter.metric_snapshots
+          sleep(8)
+          snapshot = metric_exporter.metric_snapshots
 
-        json = snapshot.map { |reading| { name: reading.name } }.to_json
-        write.puts json
-      end
+          json = snapshot.map { |reading| { name: reading.name } }.to_json
+          write.puts json
+        end
 
-      Timeout.timeout(10) do
-        Process.waitpid(pid)
-      end
+        Timeout.timeout(10) do
+          Process.waitpid(pid)
+        end
 
-      periodic_metric_reader.shutdown
-      snapshot = JSON.parse(read.gets.chomp)
-      _(snapshot.size).must_equal(1)
-      _(snapshot[0]).must_equal('name' => 'counter')
-      _(periodic_metric_reader.instance_variable_get(:@thread).alive?).must_equal false
+        periodic_metric_reader.shutdown
+        snapshot = JSON.parse(read.gets.chomp)
+        _(snapshot.size).must_equal(1)
+        _(snapshot[0]).must_equal('name' => 'counter')
+        _(periodic_metric_reader.instance_variable_get(:@thread).alive?).must_equal false
+      end
     end
   end
 end

metrics_sdk/test/opentelemetry/sdk/metrics/fork_hooks_test.rb

@@ -4,6 +4,8 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
+return if Gem.win_platform? || Gem.java_platform? # forking is not available on these platforms
+
 require 'test_helper'
 require 'json'