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// Copyright 2019-2020 Tobias Klauser
//
// 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 numcpus_test
import (
"bytes"
"errors"
"os/exec"
"runtime"
"strconv"
"strings"
"testing"
"github.com/tklauser/numcpus"
)
func testGetconf(t *testing.T, got int, name, getconfWhich string) {
t.Helper()
getconf, err := exec.LookPath("getconf")
if err != nil {
t.Skipf("getconf not found in PATH: %v", err)
}
cmd := exec.Command(getconf, getconfWhich)
var out bytes.Buffer
cmd.Stdout = &out
if err := cmd.Run(); err != nil {
t.Skipf("failed to invoke getconf: %v", err)
}
want, err := strconv.ParseInt(strings.TrimSpace(out.String()), 10, 64)
if err != nil {
t.Skipf("failed to parse getconf output: %v", err)
}
if got != int(want) {
t.Errorf("%s returned %v, want %v (getconf %s)", name, got, want, getconfWhich)
}
}
func TestGetConfigured(t *testing.T) {
n, err := numcpus.GetConfigured()
if errors.Is(err, numcpus.ErrNotSupported) {
t.Skipf("GetConfigured not supported on %s", runtime.GOOS)
} else if err != nil {
t.Fatalf("GetConfigured: %v", err)
}
t.Logf("Configured = %v", n)
testGetconf(t, n, "GetConfigured", "_NPROCESSORS_CONF")
}
func TestGetKernelMax(t *testing.T) {
n, err := numcpus.GetKernelMax()
if errors.Is(err, numcpus.ErrNotSupported) {
t.Skipf("GetKernelMax not supported on %s", runtime.GOOS)
} else if err != nil {
t.Fatalf("GetKernelMax: %v", err)
}
t.Logf("KernelMax = %v", n)
}
func TestGetOffline(t *testing.T) {
n, err := numcpus.GetOffline()
if errors.Is(err, numcpus.ErrNotSupported) {
t.Skipf("GetOffline not supported on %s", runtime.GOOS)
} else if err != nil {
t.Fatalf("GetOffline: %v", err)
}
t.Logf("Offline = %v", n)
}
func TestGetOnline(t *testing.T) {
n, err := numcpus.GetOnline()
if errors.Is(err, numcpus.ErrNotSupported) {
t.Skipf("GetOnline not supported on %s", runtime.GOOS)
} else if err != nil {
t.Fatalf("GetOnline: %v", err)
}
t.Logf("Online = %v", n)
testGetconf(t, n, "GetOnline", "_NPROCESSORS_ONLN")
}
func TestGetPossible(t *testing.T) {
n, err := numcpus.GetPossible()
if errors.Is(err, numcpus.ErrNotSupported) {
t.Skipf("GetPossible not supported on %s", runtime.GOOS)
} else if err != nil {
t.Fatalf("GetPossible: %v", err)
}
t.Logf("Possible = %v", n)
}
func TestGetPresent(t *testing.T) {
n, err := numcpus.GetPresent()
if errors.Is(err, numcpus.ErrNotSupported) {
t.Skipf("GetPresent not supported on %s", runtime.GOOS)
} else if err != nil {
t.Fatalf("GetPresent: %v", err)
}
t.Logf("Present = %v", n)
}
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