chore: update examples for datadog propagation (#3803)

update datadog example

examples/datadog-propagation/quick_start_api_datadog/Gemfile

@@ -28,7 +28,7 @@ gem "puma", "~> 5.6"
 gem "tzinfo-data"
 
 # Adding support for Datadog
-gem "ddtrace", require: "ddtrace/auto_instrument"
+gem "ddtrace", "1.23.0", require: "ddtrace/auto_instrument"
 
 # Reduces boot times through caching; required in config/boot.rb
 gem "bootsnap", require: false

examples/datadog-propagation/quick_start_api_datadog/config/initializers/datadog.rb

@@ -22,7 +22,7 @@ module Tracing
     module Transport
       class SerializableTrace
         def to_msgpack(packer = nil)
-          if ENV.has_key?('INJECT_UPPER_TRACE_ID')
+          if !ENV.has_key?('INJECT_UPPER_TRACE_ID')
             return trace.spans.map { |s| SerializableSpan.new(s) }.to_msgpack(packer)
           end
 

examples/datadog-propagation/tracebased-tests/test_integration.yaml

@@ -0,0 +1,21 @@
+type: Test
+spec:
+  id: CdhJp_xIR
+  name: Test observability integration between OTelSDK-instrumented API to Datadog-instrumented API
+  trigger:
+    type: http
+    httpRequest:
+      method: GET
+      url: http://api-otel:8080/remotehello
+      headers:
+      - key: Content-Type
+        value: application/json
+  specs:
+  - selector: "span[tracetest.span.type=\"http\" name=\"HelloController#remote_hello\" http.target=\"/remotehello\" http.method=\"GET\"]"
+    name: OpenAPI-instrumented API has been called
+    assertions:
+    - attr:http.status_code = 200
+  - selector: span[tracetest.span.type="http" name="rack.request" http.method="GET"]
+    name: Datadog-instrumented API has been called
+    assertions:
+    - attr:http.status_code = 200

examples/datadog-propagation/tracebased-tests/tracing-backend.yaml

@@ -0,0 +1,10 @@
+type: DataStore
+spec:
+  id: current
+  name: Jaeger Tracing Backend
+  type: jaeger
+  default: true
+  jaeger:
+    endpoint: jaeger:16685
+    tls:
+      insecure: true