Remove trace prefix from NoOp src files. (#1679)

trace/noop_test.go

@@ -0,0 +1,76 @@
+// 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 trace
+
+import (
+	"context"
+	"testing"
+)
+
+func TestNewNoopTracerProvider(t *testing.T) {
+	got, want := NewNoopTracerProvider(), noopTracerProvider{}
+	if got != want {
+		t.Errorf("NewNoopTracerProvider() returned %#v, want %#v", got, want)
+	}
+}
+
+func TestNoopTracerProviderTracer(t *testing.T) {
+	tp := NewNoopTracerProvider()
+	got, want := tp.Tracer(""), noopTracer{}
+	if got != want {
+		t.Errorf("noopTracerProvider.Tracer() returned %#v, want %#v", got, want)
+	}
+}
+
+func TestNoopTracerStart(t *testing.T) {
+	ctx := context.Background()
+	tracer := NewNoopTracerProvider().Tracer("test instrumentation")
+
+	var span Span
+	ctx, span = tracer.Start(ctx, "span name")
+	got, ok := span.(noopSpan)
+	if !ok {
+		t.Fatalf("noopTracer.Start() returned a non-noopSpan: %#v", span)
+	}
+	want := noopSpan{}
+	if got != want {
+		t.Errorf("noopTracer.Start() returned %#v, want %#v", got, want)
+	}
+	got, ok = SpanFromContext(ctx).(noopSpan)
+	if !ok {
+		t.Fatal("noopTracer.Start() did not set span as current in returned context")
+	}
+	if got != want {
+		t.Errorf("noopTracer.Start() current span in returned context set to %#v, want %#v", got, want)
+	}
+}
+
+func TestNoopSpan(t *testing.T) {
+	tracer := NewNoopTracerProvider().Tracer("test instrumentation")
+	_, s := tracer.Start(context.Background(), "test span")
+	span := s.(noopSpan)
+
+	if got, want := span.SpanContext(), (SpanContext{}); !assertSpanContextEqual(got, want) {
+		t.Errorf("span.SpanContext() returned %#v, want %#v", got, want)
+	}
+
+	if got, want := span.IsRecording(), false; got != want {
+		t.Errorf("span.IsRecording() returned %#v, want %#v", got, want)
+	}
+
+	if got, want := span.Tracer(), tracer; got != want {
+		t.Errorf("span.Tracer() returned %#v, want %#v", got, want)
+	}
+}