// Copyright 2019, 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 (
	"testing"

	"github.com/google/go-cmp/cmp"
	"go.opentelemetry.io/api/core"
)

func TestNeverSamperShouldSample(t *testing.T) {
	gotD := NeverSampleSampler().ShouldSample(
		core.SpanContext{}, false, core.TraceID{}, 0, "span")
	wantD := Decision{Sampled: false}
	if diff := cmp.Diff(wantD, gotD); diff != "" {
		t.Errorf("Decision: +got, -want%v", diff)
	}
}

func TestNeverSamplerDescription(t *testing.T) {
	gotDesc := NeverSampleSampler().Description()
	wantDesc := neverSamplerDescription
	if diff := cmp.Diff(wantDesc, gotDesc); diff != "" {
		t.Errorf("Description: +got, -want%v", diff)
	}
}