test: add tests for traces marshaler

Author: andrzej-stencel

exporter/debugexporter/internal/normal/traces_test.go

@@ -0,0 +1,45 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package normal
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.opentelemetry.io/collector/pdata/ptrace"
+)
+
+func TestMarshalTraces(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    ptrace.Traces
+		expected string
+	}{
+		{
+			name:     "empty traces",
+			input:    ptrace.NewTraces(),
+			expected: "",
+		},
+		{
+			name: "one span",
+			input: func() ptrace.Traces {
+				traces := ptrace.NewTraces()
+				span := traces.ResourceSpans().AppendEmpty().ScopeSpans().AppendEmpty().Spans().AppendEmpty()
+				span.SetName("span-name")
+				span.SetTraceID([16]byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10})
+				span.SetSpanID([8]byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18})
+				return traces
+			}(),
+			expected: `span-name 0102030405060708090a0b0c0d0e0f10 1112131415161718
+`,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			output, err := NewNormalTracesMarshaler().MarshalTraces(tt.input)
+			assert.NoError(t, err)
+			assert.Equal(t, tt.expected, string(output))
+		})
+	}
+}