worker/config: add tests for parseConfig

Tests are always nice, aren't they?

Signed-off-by: Ondřej Budai <ondrej@budai.cz>

cmd/osbuild-worker/config_test.go

@@ -0,0 +1,157 @@
+package main
+
+import (
+	"os"
+	"path"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_parseConfig(t *testing.T) {
+	tests := []struct {
+		name   string
+		config string
+		want   *workerConfig
+	}{
+		{
+			name: "basic",
+			config: `
+# comment
+base_path = "/api/image-builder-worker/v1"
+dnf-json = "/usr/libexec/dnf-json"
+
+[composer]
+proxy = "http://proxy.example.com"
+
+[koji."kojihub.example.com"]
+relax_timeout_factor = 5
+
+[koji."kojihub.example.com".kerberos]
+principal = "toucan-automation@EXAMPLE.COM"
+keytab = "/etc/osbuild-worker/client.keytab"
+
+[koji."kojihub.stage.example.com"]
+relax_timeout_factor = 42
+
+[koji."kojihub.stage.example.com".kerberos]
+principal = "toucan-automation-stage@EXAMPLE.COM"
+keytab = "/etc/osbuild-worker/client-stage.keytab"
+
+[gcp]
+credentials = "/etc/osbuild-worker/gcp-creds"
+
+[azure]
+credentials = "/etc/osbuild-worker/azure-creds"
+
+[aws]
+credentials = "/etc/osbuild-worker/aws-creds"
+bucket = "buckethead"
+
+[generic_s3]
+credentials = "/etc/osbuild-worker/s3-creds"
+endpoint = "http://s3.example.com"
+region = "us-east-1"
+bucket = "slash"
+ca_bundle = "/etc/osbuild-worker/s3-ca-bundle"
+skip_ssl_verification = true
+
+[authentication]
+oauth_url = "https://example.com/token"
+client_id = "toucan"
+client_secret = "/etc/osbuild-worker/client_secret"
+offline_token = "/etc/osbuild-worker/offline_token"
+`,
+			want: &workerConfig{
+				BasePath: "/api/image-builder-worker/v1",
+				DNFJson:  "/usr/libexec/dnf-json",
+				Composer: &composerConfig{
+					Proxy: "http://proxy.example.com",
+				},
+				Koji: map[string]kojiServerConfig{
+					"kojihub.example.com": {
+						Kerberos: &kerberosConfig{
+							Principal: "toucan-automation@EXAMPLE.COM",
+							KeyTab:    "/etc/osbuild-worker/client.keytab",
+						},
+						RelaxTimeoutFactor: 5,
+					},
+					"kojihub.stage.example.com": {
+						Kerberos: &kerberosConfig{
+							Principal: "toucan-automation-stage@EXAMPLE.COM",
+							KeyTab:    "/etc/osbuild-worker/client-stage.keytab",
+						},
+						RelaxTimeoutFactor: 42,
+					},
+				},
+				GCP: &gcpConfig{
+					Credentials: "/etc/osbuild-worker/gcp-creds",
+				},
+				Azure: &azureConfig{
+					Credentials: "/etc/osbuild-worker/azure-creds",
+				},
+				AWS: &awsConfig{
+					Credentials: "/etc/osbuild-worker/aws-creds",
+					Bucket:      "buckethead",
+				},
+				GenericS3: &genericS3Config{
+					Credentials:         "/etc/osbuild-worker/s3-creds",
+					Endpoint:            "http://s3.example.com",
+					Region:              "us-east-1",
+					Bucket:              "slash",
+					CABundle:            "/etc/osbuild-worker/s3-ca-bundle",
+					SkipSSLVerification: true,
+				},
+				Authentication: &authenticationConfig{
+					OAuthURL:         "https://example.com/token",
+					OfflineTokenPath: "/etc/osbuild-worker/offline_token",
+					ClientId:         "toucan",
+					ClientSecretPath: "/etc/osbuild-worker/client_secret",
+				},
+			},
+		},
+		{
+			name:   "default",
+			config: ``,
+			want: &workerConfig{
+				BasePath: "/api/worker/v1",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			configFile := prepareConfig(t, tt.config)
+			got, err := parseConfig(configFile)
+			require.NoError(t, err)
+			require.Equal(t, tt.want, got)
+		})
+	}
+
+	t.Run("non-existing", func(t *testing.T) {
+		got, err := parseConfig("/osbuild/b19b8798-5f76-4b09-9e56-5978df8f6cde")
+		require.NoError(t, err)
+
+		// check that the defaults are loaded
+		require.Equal(t, tests[1].want, got)
+	})
+
+	t.Run("wrong config", func(t *testing.T) {
+		configFile := prepareConfig(t, `[unclosed_section`)
+
+		_, err := parseConfig(configFile)
+		require.Error(t, err)
+	})
+}
+
+func prepareConfig(t *testing.T, config string) string {
+	dir := t.TempDir()
+	configFile := path.Join(dir, "config.toml")
+	f, err := os.Create(configFile)
+	require.NoError(t, err)
+
+	_, err = f.WriteString(config)
+	require.NoError(t, err)
+
+	require.NoError(t, f.Close())
+	return configFile
+}