Fix the syntax for running sub command in workflow

.github/workflows/test.yml

@@ -63,12 +63,16 @@ jobs:
       - name: run tox
         run: tox -f ${{ matrix.python-version }}-${{ matrix.package }} -- --benchmark-json=${{ env.RUN_MATRIX_COMBINATION }}-benchmark.json
       - name: Find and merge benchmarks
+        id: find_and_merge_benchmarks
         run: >-
           jq -s '.[0].benchmarks = ([.[].benchmarks] | add)
           | if .[0].benchmarks == null then null else .[0] end'
-          `find . -name '*${{ matrix.package }}*-benchmark.json'` > output.json
+          $(find . -name '*${{ matrix.package }}*-benchmark.json') > output.json
+          && echo "::set-output name=json_plaintext::$(cat output.json)"
+      - name: What is in the output value
+        run: echo ${{ steps.find_and_merge_benchmarks.outputs.benchmark_results_json }}
       - name: Report on benchmark results
-        if: `cat output.json` == null
+        if: steps.find_and_merge_benchmarks.outputs.json_plaintext != null
         uses: rhysd/github-action-benchmark@v1
         with:
           name: OpenTelemetry Python Benchmarks - Python ${{ env[matrix.python-version ]}} - ${{ matrix.package }}

exporter/opentelemetry-exporter-otlp/tests/performance/benchmarks/test_benchmark_trace_exporter.py

@@ -25,8 +25,7 @@
 def get_tracer_with_processor(span_processor_class):
     span_processor = span_processor_class(OTLPSpanExporter())
     tracer = TracerProvider(
-        active_span_processor=span_processor,
-        sampler=sampling.DEFAULT_ON,
+        active_span_processor=span_processor, sampler=sampling.DEFAULT_ON,
     ).get_tracer("pipeline_benchmark_tracer")
     return tracer