feat: bootstrap reusable GoOmni framework

database/database_test.go

@@ -0,0 +1,58 @@
+package database
+
+import (
+	"context"
+	"os"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestConfigFromEnv(t *testing.T) {
+	keys := []string{
+		"GO_OMNI_DB_DRIVER", "GO_OMNI_DB_DSN", "GO_OMNI_DB_MAX_OPEN_CONNS",
+		"GO_OMNI_DB_MAX_IDLE_CONNS", "GO_OMNI_DB_CONN_MAX_LIFETIME",
+		"GO_OMNI_DB_CONN_MAX_IDLE_TIME", "GO_OMNI_DB_PING_TIMEOUT",
+	}
+	for _, key := range keys {
+		t.Setenv(key, "")
+		_ = os.Unsetenv(key)
+	}
+	t.Setenv("GO_OMNI_DB_DSN", "root:secret@tcp(127.0.0.1:3306)/demo")
+	t.Setenv("GO_OMNI_DB_MAX_OPEN_CONNS", "20")
+	t.Setenv("GO_OMNI_DB_MAX_IDLE_CONNS", "8")
+	t.Setenv("GO_OMNI_DB_CONN_MAX_LIFETIME", "2m")
+	t.Setenv("GO_OMNI_DB_PING_TIMEOUT", "750ms")
+	cfg, err := ConfigFromEnv("")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cfg.Driver != "mysql" || cfg.DSN == "" || cfg.MaxOpenConns != 20 || cfg.MaxIdleConns != 8 || cfg.ConnMaxLifetime != 2*time.Minute || cfg.PingTimeout != 750*time.Millisecond {
+		t.Fatalf("unexpected config: %+v", cfg)
+	}
+}
+
+func TestConfigFromEnvRejectsInvalidValues(t *testing.T) {
+	t.Setenv("GO_OMNI_DB_DSN", "demo")
+	t.Setenv("GO_OMNI_DB_MAX_OPEN_CONNS", "bad")
+	if _, err := ConfigFromEnv(""); err == nil || !strings.Contains(err.Error(), "MAX_OPEN_CONNS") {
+		t.Fatalf("expected invalid pool limit error, got %v", err)
+	}
+	t.Setenv("GO_OMNI_DB_MAX_OPEN_CONNS", "2")
+	t.Setenv("GO_OMNI_DB_MAX_IDLE_CONNS", "3")
+	if _, err := ConfigFromEnv(""); err == nil || !strings.Contains(err.Error(), "max idle") {
+		t.Fatalf("expected pool relationship error, got %v", err)
+	}
+	t.Setenv("GO_OMNI_DB_MAX_IDLE_CONNS", "1")
+	t.Setenv("GO_OMNI_DB_PING_TIMEOUT", "0s")
+	if _, err := ConfigFromEnv(""); err == nil || !strings.Contains(err.Error(), "timeouts") {
+		t.Fatalf("expected timeout error, got %v", err)
+	}
+}
+
+func TestOpenValidatesBeforeLoadingDriver(t *testing.T) {
+	_, err := Open(context.Background(), Config{Driver: "", DSN: "demo"})
+	if err == nil || !strings.Contains(err.Error(), "driver") {
+		t.Fatalf("expected driver validation error, got %v", err)
+	}
+}