Initial go port of epics

internal/config/config.go

@@ -29,10 +29,11 @@ type StubConfig struct {
 }
 
 type EPICSConfig struct {
-	Enabled          bool   `toml:"enabled"`
-	CAAddrList       string `toml:"ca_addr_list"`
-	ArchiveURL       string `toml:"archive_url"`
-	ChannelFinderURL string `toml:"channel_finder_url"`
+	Enabled          bool     `toml:"enabled"`
+	CAAddrList       string   `toml:"ca_addr_list"`
+	ArchiveURL       string   `toml:"archive_url"`
+	ChannelFinderURL string   `toml:"channel_finder_url"`
+	PVNames          []string `toml:"pv_names"`
 }
 
 type SyntheticConfig struct {

internal/config/config_test.go

@@ -0,0 +1,124 @@
+package config_test
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/uopi/uopi/internal/config"
+)
+
+func TestDefault(t *testing.T) {
+	cfg := config.Default()
+	if cfg.Server.Listen == "" {
+		t.Error("Default Listen must not be empty")
+	}
+	if cfg.Server.StorageDir == "" {
+		t.Error("Default StorageDir must not be empty")
+	}
+	if !cfg.Datasource.Stub.Enabled {
+		t.Error("Stub should be enabled by default")
+	}
+	if !cfg.Datasource.EPICS.Enabled {
+		t.Error("EPICS should be enabled by default")
+	}
+	if !cfg.Datasource.Synthetic.Enabled {
+		t.Error("Synthetic should be enabled by default")
+	}
+}
+
+func TestLoadEmptyPath(t *testing.T) {
+	// Empty path should return defaults without error.
+	cfg, err := config.Load("")
+	if err != nil {
+		t.Fatalf("Load with empty path: %v", err)
+	}
+	if cfg.Server.Listen != config.Default().Server.Listen {
+		t.Errorf("Listen = %q, want default %q", cfg.Server.Listen, config.Default().Server.Listen)
+	}
+}
+
+func TestLoadTOML(t *testing.T) {
+	toml := `
+[server]
+listen = ":9090"
+storage_dir = "/tmp/uopi-test"
+
+[datasource.stub]
+enabled = false
+
+[datasource.epics]
+enabled = false
+ca_addr_list = "192.168.1.1"
+`
+	f := filepath.Join(t.TempDir(), "uopi.toml")
+	if err := os.WriteFile(f, []byte(toml), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	cfg, err := config.Load(f)
+	if err != nil {
+		t.Fatalf("Load: %v", err)
+	}
+	if cfg.Server.Listen != ":9090" {
+		t.Errorf("Listen = %q, want :9090", cfg.Server.Listen)
+	}
+	if cfg.Server.StorageDir != "/tmp/uopi-test" {
+		t.Errorf("StorageDir = %q", cfg.Server.StorageDir)
+	}
+	if cfg.Datasource.Stub.Enabled {
+		t.Error("Stub.Enabled should be false")
+	}
+	if cfg.Datasource.EPICS.Enabled {
+		t.Error("EPICS.Enabled should be false")
+	}
+	if cfg.Datasource.EPICS.CAAddrList != "192.168.1.1" {
+		t.Errorf("CAAddrList = %q", cfg.Datasource.EPICS.CAAddrList)
+	}
+}
+
+func TestLoadBadPath(t *testing.T) {
+	_, err := config.Load("/no/such/file.toml")
+	if err == nil {
+		t.Error("expected error for missing file")
+	}
+}
+
+func TestEnvOverrides(t *testing.T) {
+	t.Setenv("UOPI_SERVER_LISTEN", ":7777")
+	t.Setenv("UOPI_SERVER_STORAGE_DIR", "/env/storage")
+	t.Setenv("UOPI_EPICS_CA_ADDR_LIST", "10.0.0.1 10.0.0.2")
+	t.Setenv("UOPI_EPICS_ARCHIVE_URL", "http://archive/")
+	t.Setenv("UOPI_EPICS_CHANNEL_FINDER_URL", "http://cf/")
+
+	cfg, err := config.Load("")
+	if err != nil {
+		t.Fatalf("Load: %v", err)
+	}
+	if cfg.Server.Listen != ":7777" {
+		t.Errorf("Listen = %q, want :7777", cfg.Server.Listen)
+	}
+	if cfg.Server.StorageDir != "/env/storage" {
+		t.Errorf("StorageDir = %q", cfg.Server.StorageDir)
+	}
+	if cfg.Datasource.EPICS.CAAddrList != "10.0.0.1 10.0.0.2" {
+		t.Errorf("CAAddrList = %q", cfg.Datasource.EPICS.CAAddrList)
+	}
+	if cfg.Datasource.EPICS.ArchiveURL != "http://archive/" {
+		t.Errorf("ArchiveURL = %q", cfg.Datasource.EPICS.ArchiveURL)
+	}
+	if cfg.Datasource.EPICS.ChannelFinderURL != "http://cf/" {
+		t.Errorf("ChannelFinderURL = %q", cfg.Datasource.EPICS.ChannelFinderURL)
+	}
+}
+
+func TestEnvTrimsWhitespace(t *testing.T) {
+	t.Setenv("UOPI_SERVER_LISTEN", "  :8888  ")
+	cfg, err := config.Load("")
+	if err != nil {
+		t.Fatalf("Load: %v", err)
+	}
+	if cfg.Server.Listen != ":8888" {
+		t.Errorf("Listen = %q, expected whitespace trimmed", cfg.Server.Listen)
+	}
+}