add another unit test

Author: jackgopack4

exporter/exporterhelper/traces.go

@@ -8,9 +8,8 @@ import (
 	"encoding/json"
 	"errors"
 
-	"go.uber.org/zap"
-
 	"go.opentelemetry.io/otel/trace"
+	"go.uber.org/zap"
 
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/consumer"

exporter/exporterhelper/traces_test.go

@@ -499,3 +499,18 @@ func TestSerializableToLink(t *testing.T) {
 	// TraceState will be empty due to error in inserting Member Key "@key"
 	assert.Equal(t, trace.TraceState{}, res.SpanContext.TraceState())
 }
+
+func TestTracesEncoding_Unmarshal_InvalidJSON(t *testing.T) {
+	// Create invalid JSON bytes
+	invalidJSON := []byte(`{invalid json}`)
+
+	// Create tracesEncoding instance
+	encoding := tracesEncoding{}
+
+	// Attempt to unmarshal invalid JSON
+	req, err := encoding.Unmarshal(invalidJSON)
+
+	// Verify error is returned and request is nil
+	assert.Error(t, err)
+	assert.Nil(t, req)
+}