add unit test

bridge/opencensus/config_test.go

@@ -0,0 +1,55 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/trace"
+)
+
+func TestNewTraceConfig(t *testing.T) {
+	globalTP := trace.NewNoopTracerProvider()
+	customTP := trace.NewNoopTracerProvider()
+	otel.SetTracerProvider(globalTP)
+	for _, tc := range []struct {
+		desc     string
+		opts     []TraceOption
+		expected traceConfig
+	}{
+		{
+			desc: "default",
+			expected: traceConfig{
+				tp: globalTP,
+			},
+		},
+		{
+			desc: "overridden",
+			opts: []TraceOption{
+				WithTracerProvider(customTP),
+			},
+			expected: traceConfig{
+				tp: customTP,
+			},
+		},
+	} {
+		t.Run(tc.desc, func(t *testing.T) {
+			cfg := newTraceConfig(tc.opts)
+			assert.Equal(t, tc.expected, cfg)
+		})
+	}
+}