mirror of
https://github.com/prometheus-community/windows_exporter.git
synced 2026-10-17 18:19:04 +02:00
79 lines
2.4 KiB
Go
79 lines
2.4 KiB
Go
// SPDX-License-Identifier: Apache-2.0
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//
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// Copyright The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build windows
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package lazyproc_test
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import (
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"errors"
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"strings"
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"testing"
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"github.com/prometheus-community/windows_exporter/internal/headers/lazyproc"
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"github.com/stretchr/testify/require"
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"golang.org/x/sys/windows"
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)
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func TestFind(t *testing.T) {
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t.Parallel()
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kernel32 := windows.NewLazySystemDLL("kernel32.dll")
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missingDLL := windows.NewLazySystemDLL("windows_exporter_missing.dll")
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t.Run("all present", func(t *testing.T) {
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t.Parallel()
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require.NoError(t, lazyproc.Find(kernel32, kernel32.NewProc("GetTickCount64"), kernel32.NewProc("GetSystemInfo")))
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require.NoError(t, lazyproc.Find(kernel32))
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})
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t.Run("missing export", func(t *testing.T) {
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t.Parallel()
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err := lazyproc.Find(kernel32, kernel32.NewProc("GetTickCount64"), kernel32.NewProc("WindowsExporterMissingExport"))
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require.ErrorIs(t, err, errors.ErrUnsupported)
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require.ErrorContains(t, err, "WindowsExporterMissingExport")
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})
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t.Run("missing DLL is reported once", func(t *testing.T) {
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t.Parallel()
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err := lazyproc.Find(missingDLL, missingDLL.NewProc("A"), missingDLL.NewProc("B"))
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require.ErrorIs(t, err, errors.ErrUnsupported)
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require.Equal(t, 1, strings.Count(err.Error(), "windows_exporter_missing.dll"), err.Error())
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// The loader error stays text only, so the error has a single cause.
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require.NotErrorIs(t, err, windows.ERROR_MOD_NOT_FOUND)
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var lazyErr *lazyproc.Error
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require.ErrorAs(t, err, &lazyErr)
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require.Equal(t, "windows_exporter_missing.dll", lazyErr.DLL)
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require.Len(t, lazyErr.Missing, 1)
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})
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t.Run("Once", func(t *testing.T) {
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t.Parallel()
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load := lazyproc.Once(kernel32, kernel32.NewProc("WindowsExporterMissingExport"))
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first := load()
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require.ErrorIs(t, first, errors.ErrUnsupported)
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// The cached error is returned again.
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require.Same(t, first, load())
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})
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}
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