[no-relnote] Add unit test for installer command

This change adds a basic unit test for the nvidia-ckt-installer command.

Signed-off-by: Evan Lezar <elezar@nvidia.com>

cmd/nvidia-ctk-installer/main.go

@@ -38,6 +38,7 @@ type options struct {
 	runtimeArgs string
 	root        string
 	pidFile     string
+	sourceRoot  string
 
 	toolkitOptions toolkit.Options
 	runtimeOptions runtime.Options
@@ -141,6 +142,13 @@ func (a app) build() *cli.App {
 			Destination: &options.root,
 			EnvVars:     []string{"ROOT"},
 		},
+		&cli.StringFlag{
+			Name:        "source-root",
+			Value:       "/",
+			Usage:       "The folder where the required toolkit artifacts can be found",
+			Destination: &options.sourceRoot,
+			EnvVars:     []string{"SOURCE_ROOT"},
+		},
 		&cli.StringFlag{
 			Name:        "pid-file",
 			Value:       defaultPidFile,
@@ -159,6 +167,7 @@ func (a app) build() *cli.App {
 func (a *app) Before(c *cli.Context, o *options) error {
 	a.toolkit = toolkit.NewInstaller(
 		toolkit.WithLogger(a.logger),
+		toolkit.WithSourceRoot(o.sourceRoot),
 		toolkit.WithToolkitRoot(o.toolkitRoot()),
 	)
 	return a.validateFlags(c, o)

cmd/nvidia-ctk-installer/main_test.go

@@ -18,10 +18,15 @@ package main
 
 import (
 	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
 	"testing"
 
 	testlog "github.com/sirupsen/logrus/hooks/test"
 	"github.com/stretchr/testify/require"
+
+	"github.com/NVIDIA/nvidia-container-toolkit/internal/test"
 )
 
 func TestParseArgs(t *testing.T) {
@@ -84,3 +89,118 @@ func TestParseArgs(t *testing.T) {
 		})
 	}
 }
+
+func TestApp(t *testing.T) {
+	t.Setenv("__NVCT_TESTING_DEVICES_ARE_FILES", "true")
+	logger, _ := testlog.NewNullLogger()
+
+	moduleRoot, err := test.GetModuleRoot()
+	require.NoError(t, err)
+
+	artifactRoot := filepath.Join(moduleRoot, "testdata", "installer", "artifacts")
+
+	testCases := []struct {
+		description           string
+		args                  []string
+		expectedToolkitConfig string
+		expectedRuntimeConfig string
+	}{
+		{
+			description: "no args",
+			expectedToolkitConfig: `accept-nvidia-visible-devices-as-volume-mounts = false
+accept-nvidia-visible-devices-envvar-when-unprivileged = true
+disable-require = false
+supported-driver-capabilities = "compat32,compute,display,graphics,ngx,utility,video"
+swarm-resource = ""
+
+[nvidia-container-cli]
+  debug = ""
+  environment = []
+  ldcache = ""
+  ldconfig = "@/run/nvidia/driver/sbin/ldconfig"
+  load-kmods = true
+  no-cgroups = false
+  path = "{{ .toolkitRoot }}/toolkit/nvidia-container-cli"
+  root = "/run/nvidia/driver"
+  user = ""
+
+[nvidia-container-runtime]
+  debug = "/dev/null"
+  log-level = "info"
+  mode = "auto"
+  runtimes = ["docker-runc", "runc", "crun"]
+
+  [nvidia-container-runtime.modes]
+
+    [nvidia-container-runtime.modes.cdi]
+      annotation-prefixes = ["cdi.k8s.io/"]
+      default-kind = "nvidia.com/gpu"
+      spec-dirs = ["/etc/cdi", "/var/run/cdi"]
+
+    [nvidia-container-runtime.modes.csv]
+      mount-spec-path = "/etc/nvidia-container-runtime/host-files-for-container.d"
+
+[nvidia-container-runtime-hook]
+  path = "{{ .toolkitRoot }}/toolkit/nvidia-container-runtime-hook"
+  skip-mode-detection = true
+
+[nvidia-ctk]
+  path = "{{ .toolkitRoot }}/toolkit/nvidia-ctk"
+`,
+			expectedRuntimeConfig: `{
+    "default-runtime": "nvidia",
+    "runtimes": {
+        "nvidia": {
+            "args": [],
+            "path": "{{ .toolkitRoot }}/toolkit/nvidia-container-runtime"
+        },
+        "nvidia-cdi": {
+            "args": [],
+            "path": "{{ .toolkitRoot }}/toolkit/nvidia-container-runtime.cdi"
+        },
+        "nvidia-legacy": {
+            "args": [],
+            "path": "{{ .toolkitRoot }}/toolkit/nvidia-container-runtime.legacy"
+        }
+    }
+}`,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.description, func(t *testing.T) {
+			testRoot := t.TempDir()
+
+			runtimeConfigFile := filepath.Join(testRoot, "config.file")
+
+			toolkitRoot := filepath.Join(testRoot, "toolkit-test")
+			toolkitConfigFile := filepath.Join(toolkitRoot, "toolkit/.config/nvidia-container-runtime/config.toml")
+
+			app := NewApp(logger, toolkitRoot)
+
+			testArgs := []string{
+				"nvidia-ctk-installer",
+				"--no-daemon",
+				"--pid-file=" + filepath.Join(testRoot, "toolkit.pid"),
+				"--source-root=" + filepath.Join(artifactRoot, "deb"),
+				"--config=" + runtimeConfigFile,
+				"--restart-mode=none",
+			}
+
+			err := app.Run(append(testArgs, tc.args...))
+
+			require.NoError(t, err)
+
+			require.FileExists(t, toolkitConfigFile)
+			toolkitConfigFileContents, err := os.ReadFile(toolkitConfigFile)
+			require.NoError(t, err)
+			require.EqualValues(t, strings.ReplaceAll(tc.expectedToolkitConfig, "{{ .toolkitRoot }}", toolkitRoot), string(toolkitConfigFileContents))
+
+			require.FileExists(t, runtimeConfigFile)
+			runtimeConfigFileContents, err := os.ReadFile(runtimeConfigFile)
+			require.NoError(t, err)
+			require.EqualValues(t, strings.ReplaceAll(tc.expectedRuntimeConfig, "{{ .toolkitRoot }}", toolkitRoot), string(runtimeConfigFileContents))
+		})
+	}
+
+}