export otlp InstrumentationScope attributes (#825)

* export otlp InstrumentationScope attributes

* remove redundant setting of dropped attributes count

src/Contrib/Otlp/MetricConverter.php

@@ -95,6 +95,7 @@ final class MetricConverter
         $pInstrumentationScope = new InstrumentationScope();
         $pInstrumentationScope->setName($instrumentationScope->getName());
         $pInstrumentationScope->setVersion((string) $instrumentationScope->getVersion());
+        $this->setAttributes($pInstrumentationScope, $instrumentationScope->getAttributes());
         $pScopeMetrics->setScope($pInstrumentationScope);
         $pScopeMetrics->setSchemaUrl((string) $instrumentationScope->getSchemaUrl());
 
@@ -230,7 +231,7 @@ final class MetricConverter
     }
 
     /**
-     * @param Resource_|NumberDataPoint|HistogramDataPoint $pElement
+     * @param Resource_|NumberDataPoint|HistogramDataPoint|InstrumentationScope $pElement
      */
     private function setAttributes($pElement, SDK\Common\Attribute\AttributesInterface $attributes): void
     {

src/Contrib/Otlp/SpanConverter.php

@@ -92,6 +92,7 @@ final class SpanConverter
         $pInstrumentationScope = new InstrumentationScope();
         $pInstrumentationScope->setName($instrumentationScope->getName());
         $pInstrumentationScope->setVersion((string) $instrumentationScope->getVersion());
+        $this->setAttributes($pInstrumentationScope, $instrumentationScope->getAttributes());
         $pScopeSpans->setScope($pInstrumentationScope);
         $pScopeSpans->setSchemaUrl((string) $instrumentationScope->getSchemaUrl());
 
@@ -99,7 +100,7 @@ final class SpanConverter
     }
 
     /**
-     * @param Resource_|Span|Event|Link $pElement
+     * @param Resource_|Span|Event|Link|InstrumentationScope $pElement
      */
     private function setAttributes($pElement, AttributesInterface $attributes): void
     {

tests/Unit/Contrib/Otlp/MetricConverterTest.php

@@ -205,4 +205,28 @@ final class MetricConverterTest extends TestCase
             ])->getResourceMetrics(),
         );
     }
+
+    public function test_instrumentation_scope_is_converted(): void
+    {
+        $this->assertJsonStringEqualsJsonString(
+            <<<JSON
+                {"resourceMetrics": [{"resource": {},"scopeMetrics": [{
+                    "metrics": [{"description": "description-1","name": "name-1","unit": "unit-1"}],
+                    "schemaUrl": "http://schema.url",
+                    "scope": {"attributes": [{"key": "foo","value": {"stringValue": "bar"}}],"name": "scope-name","version": "scope-version"}
+                }
+            ]}]}
+            JSON,
+            (new MetricConverter())->convert([
+                new Metric(
+                    new InstrumentationScope('scope-name', 'scope-version', 'http://schema.url', Attributes::create(['foo' => 'bar'])),
+                    ResourceInfoFactory::emptyResource(),
+                    'name-1',
+                    'unit-1',
+                    'description-1',
+                    $this->createMock(DataInterface::class),
+                ),
+            ])->serializeToJsonString(),
+        );
+    }
 }

tests/Unit/Contrib/Otlp/OTLPSpanConverterTest.php

@@ -166,7 +166,7 @@ class OTLPSpanConverterTest extends TestCase
             ->setStartEpochNanos($start_time)
             ->setEndEpochNanos($end_time)
             ->setName('http_get')
-            ->setInstrumentationScope(new InstrumentationScope('lib-test', 'v0.1.0', 'http://url', Attributes::create([])))
+            ->setInstrumentationScope(new InstrumentationScope('lib-test', 'v0.1.0', 'http://url', Attributes::create(['foo' => 'bar'])))
             ->addAttribute('user', 'alice')
             ->addAttribute('authenticated', true)
             ->addEvent('Event1', Attributes::create(['success' => 'yes']), 1617313804325769955)
@@ -204,6 +204,12 @@ class OTLPSpanConverterTest extends TestCase
                     'scope' => new \Opentelemetry\Proto\Common\V1\InstrumentationScope([
                         'name' => 'lib-test',
                         'version' => 'v0.1.0',
+                        'attributes' => [
+                            new KeyValue([
+                                'key' => 'foo',
+                                'value' => new AnyValue(['string_value' => 'bar']),
+                            ]),
+                        ],
                     ]),
                     'spans' => [
                         new V1\Span([