Add some tests for config update from env

config/config.go

@@ -88,8 +88,13 @@ func FromDefault() *Config {
 			HTTP: &ServerHTTPConfig{
 				ListenAddr: ":8089",
 			},
-			DataStoreConfig: &ServerDataStoreConfig{},
+			DataStoreConfig: &ServerDataStoreConfig{
-			FileStoreConfig: &ServerFileStoreConfig{},
+				BoltStoreConfig: &BoltStoreConfig{},
+			},
+			FileStoreConfig: &ServerFileStoreConfig{
+				BoltStoreConfig: &BoltStoreConfig{},
+				FSStoreConfig:   &FSStoreConfig{},
+			},
 		},
 		Client: &ClientConfig{
 			Certs: &CertificatePaths{},

config/config_test.go

@@ -1,6 +1,7 @@
 package config_test
 
 import (
+	"os"
 	"strings"
 	"testing"
 
@@ -206,4 +207,55 @@ func TestConfig(t *testing.T) {
 			})
 		}
 	})
+	t.Run("FromEnv", func(t *testing.T) {
+		// Unset any existing ezshare env vars
+		for _, env := range os.Environ() {
+			if strings.HasPrefix(env, "EZSHARE") {
+				os.Unsetenv(env)
+			}
+		}
+
+		cfg := config.FromDefault()
+		// Test Server.LogLevel
+		if cfg.Server.LogLevel == "WARN" {
+			t.Errorf("Loglevel is WARN before updating from env.")
+		}
+		os.Setenv("EZSHARE_SERVER_LOGLEVEL", "WARN")
+		if err := cfg.UpdateFromEnv(); err != nil {
+			t.Fatalf("Error updating config from environment: %s", err)
+		}
+		if cfg.Server.LogLevel != "WARN" {
+			t.Errorf("Loglevel is not WARN after updating from env.")
+		}
+
+		// Test Server.Hostname
+		hostname := "https://share.example.org"
+		os.Setenv("EZSHARE_SERVER_HOSTNAME", hostname)
+		if err := cfg.UpdateFromEnv(); err != nil {
+			t.Fatalf("Error updating config from environment: %s", err)
+		}
+		if cfg.Server.Hostname != hostname {
+			t.Errorf("Hostname is incorrect after updating from env.")
+		}
+
+		// Test Server.Datastore.Bolt.Path
+		boltPath := "/data/bolt.db"
+		os.Setenv("EZSHARE_SERVER_DATASTORE_BOLT_PATH", boltPath)
+		if err := cfg.UpdateFromEnv(); err != nil {
+			t.Fatalf("Error updating config from environment: %s", err)
+		}
+		if cfg.Server.DataStoreConfig.BoltStoreConfig.Path != boltPath {
+			t.Errorf("Bolt path is incorrect after updating from env.")
+		}
+
+		// Test Server.Datastore.Bolt.Path
+		caCertPath := "/data/cert.pem"
+		os.Setenv("EZSHARE_SERVER_GRPC_CACERTS_CERTIFICATEKEYPATH", caCertPath)
+		if err := cfg.UpdateFromEnv(); err != nil {
+			t.Fatalf("Error updating config from environment: %s", err)
+		}
+		if cfg.Server.GRPC.CACerts.CertificateKeyPath != caCertPath {
+			t.Errorf("GPRC CA Cert path is incorrect after updating from env.")
+		}
+	})
 }