🟢 add tests for Hetzner Cloud detection

Tests cover DMI-based detection (positive + negative), metadata
identity resolution, and raw metadata parsing using mock data
from a real Hetzner Cloud instance.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: tas50

providers/os/id/hetzner/hetzner_test.go

@@ -0,0 +1,40 @@
+// Copyright (c) Mondoo, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
+package hetzner
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.mondoo.com/mql/v13/providers-sdk/v1/inventory"
+	"go.mondoo.com/mql/v13/providers/os/connection/mock"
+	"go.mondoo.com/mql/v13/providers/os/detector"
+)
+
+func TestDetectLinuxInstance(t *testing.T) {
+	conn, err := mock.New(0, &inventory.Asset{}, mock.WithPath("./testdata/instance_linux.toml"))
+	require.NoError(t, err)
+	platform, ok := detector.DetectOS(conn)
+	require.True(t, ok)
+
+	identifier, name, relatedIdentifiers := Detect(conn, platform)
+
+	assert.Equal(t, "//platformid.api.mondoo.app/runtime/hetzner/instances/110512417", identifier)
+	assert.Equal(t, "ubuntu-8gb-hil-1", name)
+	assert.Empty(t, relatedIdentifiers)
+}
+
+func TestNoMatch(t *testing.T) {
+	conn, err := mock.New(0, &inventory.Asset{}, mock.WithPath("./testdata/non_hetzner.toml"))
+	require.NoError(t, err)
+	platform, ok := detector.DetectOS(conn)
+	require.True(t, ok)
+
+	identifier, name, relatedIdentifiers := Detect(conn, platform)
+
+	assert.Empty(t, identifier)
+	assert.Empty(t, name)
+	assert.Empty(t, relatedIdentifiers)
+}

providers/os/id/hetzner/testdata/instance_linux.toml

@@ -0,0 +1,39 @@
+[commands."uname -s"]
+stdout = "Linux"
+
+[commands."uname -m"]
+stdout = "x86_64"
+
+[commands."uname -r"]
+stdout = "5.15.0-91-generic"
+
+[files."/sys/class/dmi/id/sys_vendor"]
+  path = "/sys/class/dmi/id/sys_vendor"
+  enoent = false
+  content = "Hetzner"
+
+[files."/sys/class/dmi/id/product_name"]
+  path = "/sys/class/dmi/id/product_name"
+  enoent = false
+  content = "vServer"
+
+[files."/sys/class/dmi/id/bios_vendor"]
+  path = "/sys/class/dmi/id/bios_vendor"
+  enoent = false
+  content = "Hetzner"
+
+[files."/sys/class/dmi/id/chassis_vendor"]
+  path = "/sys/class/dmi/id/chassis_vendor"
+  enoent = false
+  content = "QEMU"
+
+[commands.d4923e3c7f9c8dec0409fddee98da395085699bbb2cc9cfc8c3527e02f746c41]
+  command = "curl --retry 3 --retry-delay 1 --connect-timeout 1 --retry-max-time 5 --max-time 10 --noproxy '*' http://169.254.169.254/hetzner/v1/metadata"
+  exit_status = 0
+  stdout = """
+instance-id: 110512417
+hostname: ubuntu-8gb-hil-1
+region: us-west
+availability-zone: hil-dc1
+local-ipv4: ""
+"""

providers/os/id/hetzner/testdata/non_hetzner.toml

@@ -0,0 +1,13 @@
+[commands."uname -s"]
+stdout = "Linux"
+
+[commands."uname -m"]
+stdout = "x86_64"
+
+[commands."uname -r"]
+stdout = "5.15.0-91-generic"
+
+[files."/sys/class/dmi/id/sys_vendor"]
+  path = "/sys/class/dmi/id/sys_vendor"
+  enoent = false
+  content = "Microsoft Corporation"

providers/os/id/hetznercloud/hetznercloud_test.go

@@ -0,0 +1,53 @@
+// Copyright (c) Mondoo, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
+package hetznercloud_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.mondoo.com/mql/v13/providers-sdk/v1/inventory"
+	"go.mondoo.com/mql/v13/providers/os/connection/mock"
+	"go.mondoo.com/mql/v13/providers/os/detector"
+	"go.mondoo.com/mql/v13/providers/os/id/hetznercloud"
+)
+
+func TestIdentifyLinux(t *testing.T) {
+	conn, err := mock.New(0, &inventory.Asset{}, mock.WithPath("./testdata/metadata_linux.toml"))
+	require.NoError(t, err)
+	platform, ok := detector.DetectOS(conn)
+	require.True(t, ok)
+
+	resolver, err := hetznercloud.Resolve(conn, platform)
+	require.NoError(t, err)
+
+	ident, err := resolver.Identify()
+	require.NoError(t, err)
+
+	assert.Equal(t, "//platformid.api.mondoo.app/runtime/hetzner/instances/110512417", ident.InstanceID)
+	assert.Equal(t, "ubuntu-8gb-hil-1", ident.Hostname)
+	assert.Equal(t, "us-west", ident.Region)
+}
+
+func TestRawMetadataLinux(t *testing.T) {
+	conn, err := mock.New(0, &inventory.Asset{}, mock.WithPath("./testdata/metadata_linux.toml"))
+	require.NoError(t, err)
+	platform, ok := detector.DetectOS(conn)
+	require.True(t, ok)
+
+	resolver, err := hetznercloud.Resolve(conn, platform)
+	require.NoError(t, err)
+
+	raw, err := resolver.RawMetadata()
+	require.NoError(t, err)
+
+	m, ok := raw.(map[string]any)
+	require.True(t, ok)
+
+	assert.Equal(t, 110512417, m["instance-id"])
+	assert.Equal(t, "ubuntu-8gb-hil-1", m["hostname"])
+	assert.Equal(t, "us-west", m["region"])
+	assert.Equal(t, "hil-dc1", m["availability-zone"])
+}

providers/os/id/hetznercloud/testdata/metadata_linux.toml

@@ -0,0 +1,19 @@
+[commands."uname -s"]
+stdout = "Linux"
+
+[commands."uname -m"]
+stdout = "x86_64"
+
+[commands."uname -r"]
+stdout = "5.15.0-91-generic"
+
+[commands.d4923e3c7f9c8dec0409fddee98da395085699bbb2cc9cfc8c3527e02f746c41]
+  command = "curl --retry 3 --retry-delay 1 --connect-timeout 1 --retry-max-time 5 --max-time 10 --noproxy '*' http://169.254.169.254/hetzner/v1/metadata"
+  exit_status = 0
+  stdout = """
+instance-id: 110512417
+hostname: ubuntu-8gb-hil-1
+region: us-west
+availability-zone: hil-dc1
+local-ipv4: ""
+"""