always set schema url

Author: zeitlinger

exporters/prometheus/src/test/java/io/opentelemetry/exporter/prometheus/PrometheusHttpServerTest.java

@@ -139,10 +139,10 @@ void fetchPrometheus() {
  .isEqualTo(
  "# HELP grpc_name_unit_total long_description\n"
  + "# TYPE grpc_name_unit_total counter\n"
- + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_version=\"version\"} 5.0\n"
+ + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 5.0\n"
  + "# HELP http_name_unit_total double_description\n"
  + "# TYPE http_name_unit_total counter\n"
- + "http_name_unit_total{kp=\"vp\",otel_scope_name=\"http\",otel_scope_version=\"version\"} 3.5\n"
+ + "http_name_unit_total{kp=\"vp\",otel_scope_name=\"http\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 3.5\n"
  + "# TYPE target_info gauge\n"
  + "target_info{kr=\"vr\"} 1\n");
  }
@@ -229,11 +229,11 @@ void fetchOpenMetrics() {
  "# TYPE grpc_name_unit counter\n"
  + "# UNIT grpc_name_unit unit\n"
  + "# HELP grpc_name_unit long_description\n"
- + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_version=\"version\"} 5.0\n"
+ + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 5.0\n"
  + "# TYPE http_name_unit counter\n"
  + "# UNIT http_name_unit unit\n"
  + "# HELP http_name_unit double_description\n"
- + "http_name_unit_total{kp=\"vp\",otel_scope_name=\"http\",otel_scope_version=\"version\"} 3.5\n"
+ + "http_name_unit_total{kp=\"vp\",otel_scope_name=\"http\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 3.5\n"
  + "# TYPE target info\n"
  + "target_info{kr=\"vr\"} 1\n"
  + "# EOF\n");
@@ -255,7 +255,7 @@ void fetchFiltered() {
  ""
  + "# HELP grpc_name_unit_total long_description\n"
  + "# TYPE grpc_name_unit_total counter\n"
- + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_version=\"version\"} 5.0\n"
+ + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 5.0\n"
  + "# TYPE target_info gauge\n"
  + "target_info{kr=\"vr\"} 1\n");
  }
@@ -292,10 +292,10 @@ public Collection<MetricData> collectAllMetrics() {
  .isEqualTo(
  "# HELP grpc_name_unit_total long_description\n"
  + "# TYPE grpc_name_unit_total counter\n"
- + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_version=\"version\"} 5.0\n"
+ + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 5.0\n"
  + "# HELP http_name_unit_total double_description\n"
  + "# TYPE http_name_unit_total counter\n"
- + "http_name_unit_total{kp=\"vp\",otel_scope_name=\"http\",otel_scope_version=\"version\"} 3.5\n"
+ + "http_name_unit_total{kp=\"vp\",otel_scope_name=\"http\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 3.5\n"
  + "# TYPE target_info gauge\n"
  + "target_info{kr=\"vr\"} 1\n");
  }
@@ -320,10 +320,10 @@ void fetchPrometheusCompressed() throws IOException {
  .isEqualTo(
  "# HELP grpc_name_unit_total long_description\n"
  + "# TYPE grpc_name_unit_total counter\n"
- + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_version=\"version\"} 5.0\n"
+ + "grpc_name_unit_total{kp=\"vp\",otel_scope_name=\"grpc\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 5.0\n"
  + "# HELP http_name_unit_total double_description\n"
  + "# TYPE http_name_unit_total counter\n"
- + "http_name_unit_total{kp=\"vp\",otel_scope_name=\"http\",otel_scope_version=\"version\"} 3.5\n"
+ + "http_name_unit_total{kp=\"vp\",otel_scope_name=\"http\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 3.5\n"
  + "# TYPE target_info gauge\n"
  + "target_info{kr=\"vr\"} 1\n");
  }
@@ -395,8 +395,8 @@ void fetch_DuplicateMetrics() {
  assertThat(response.contentUtf8())
  .isEqualTo(
  "# TYPE foo_unit_total counter\n"
- + "foo_unit_total{otel_scope_name=\"scope1\"} 1.0\n"
- + "foo_unit_total{otel_scope_name=\"scope2\"} 2.0\n"
+ + "foo_unit_total{otel_scope_name=\"scope1\",otel_scope_schema_url=\"\"} 1.0\n"
+ + "foo_unit_total{otel_scope_name=\"scope2\",otel_scope_schema_url=\"\"} 2.0\n"
  + "# TYPE target_info gauge\n"
  + "target_info{kr=\"vr\"} 1\n");
 
@@ -476,12 +476,12 @@ public Collection<MetricData> collectAllMetrics() {
  + "# TYPE grpc_name_unit_total counter\n"
 
  // Note the added resource attributes as labels
- + "grpc_name_unit_total{kp=\"vp\",kr=\"vr\",otel_scope_name=\"grpc\",otel_scope_version=\"version\"} 5.0\n"
+ + "grpc_name_unit_total{kp=\"vp\",kr=\"vr\",otel_scope_name=\"grpc\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 5.0\n"
  + "# HELP http_name_unit_total double_description\n"
  + "# TYPE http_name_unit_total counter\n"
 
  // Note the added resource attributes as labels
- + "http_name_unit_total{kp=\"vp\",kr=\"vr\",otel_scope_name=\"http\",otel_scope_version=\"version\"} 3.5\n"
+ + "http_name_unit_total{kp=\"vp\",kr=\"vr\",otel_scope_name=\"http\",otel_scope_schema_url=\"\",otel_scope_version=\"version\"} 3.5\n"
  + "# TYPE target_info gauge\n"
  + "target_info{kr=\"vr\"} 1\n");
  }
@@ -606,6 +606,10 @@ void histogramDefaultBase2ExponentialHistogram() throws IOException {
  + " name: \"otel_scope_name\"\n"
  + " value: \"meter\"\n"
  + " }\n"
+ + " label {\n"
+ + " name: \"otel_scope_schema_url\"\n"
+ + " value: \"\"\n"
+ + " }\n"
  + " histogram {\n"
  + " sample_count: 1\n"
  + " sample_sum: 1.0\n"