add test coverage

Signed-off-by: ChrsMark <[email protected]>

Author: ChrsMark

cmd/mdatagen/internal/loader_test.go

@@ -519,6 +519,16 @@ func TestLoadMetadata(t *testing.T) {
 			want:    Metadata{},
 			wantErr: "decoding failed due to the following error(s):\n\n'attributes[used_attr].type' invalid type: \"invalidtype\"",
 		},
+		{
+			name:    "testdata/invalid_metric_stability.yaml",
+			want:    Metadata{},
+			wantErr: "decoding failed due to the following error(s):\n\n'metrics[default.metric]' decoding failed due to the following error(s):\n\n'stability' decoding failed due to the following error(s):\n\n'level' unsupported stability level: \"development42\"",
+		},
+		{
+			name:    "testdata/no_metric_stability.yaml",
+			want:    Metadata{},
+			wantErr: "decoding failed due to the following error(s):\n\n'metrics[default.metric]' decoding failed due to the following error(s):\n\n'stability' missing required field: `stability.level`",
+		},
 		{
 			name:    "testdata/~~this file doesn't exist~~.yaml",
 			wantErr: "unable to read the file file:testdata/~~this file doesn't exist~~.yaml",

cmd/mdatagen/internal/samplefactoryreceiver/internal/metadata/generated_telemetry.go

@@ -0,0 +1,24 @@
+type: metricreceiver
+
+status:
+  class: receiver
+  stability:
+    development: [logs]
+    beta: [traces]
+    stable: [metrics]
+  distributions: [contrib]
+  warnings:
+    - Any additional information that should be brought to the consumer's attention
+
+metrics:
+  default.metric:
+    enabled: true
+    description: Monotonic cumulative sum int metric enabled by default.
+    extended_documentation: The metric will be become optional soon.
+    stability:
+      level: development42
+    unit: s
+    sum:
+      value_type: int
+      monotonic: true
+      aggregation_temporality: cumulative

cmd/mdatagen/internal/testdata/invalid_metric_stability.yaml

@@ -0,0 +1,23 @@
+type: metricreceiver
+
+status:
+  class: receiver
+  stability:
+    development: [logs]
+    beta: [traces]
+    stable: [metrics]
+  distributions: [contrib]
+  warnings:
+    - Any additional information that should be brought to the consumer's attention
+
+metrics:
+  default.metric:
+    enabled: true
+    description: Monotonic cumulative sum int metric enabled by default.
+    extended_documentation: The metric will be become optional soon.
+    stability: ~
+    unit: s
+    sum:
+      value_type: int
+      monotonic: true
+      aggregation_temporality: cumulative

cmd/mdatagen/internal/testdata/no_metric_stability.yaml

@@ -1322,7 +1322,7 @@ func assertReceiverTraces(t *testing.T, tt *componenttest.Telemetry, id componen
 	metricdatatest.AssertEqual(t,
 		metricdata.Metrics{
 			Name:        "otelcol_receiver_failed_spans",
-			Description: "The number of spans that failed to be processed by the receiver due to internal errors. [alpha]",
+			Description: "The number of spans that failed to be processed by the receiver due to internal errors. [Alpha]",
 			Unit:        "{spans}",
 			Data: metricdata.Sum[int64]{
 				Temporality: metricdata.CumulativeTemporality,