Initial MVP commit

internal/platform/config/config_test.go

@@ -0,0 +1,53 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestLoadRootList(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "config.yml")
+	content := `
+- name: weatherdb
+  driver: postgres
+  params:
+    uri: postgres://weatherdb:5432/weatherdb?sslmode=disable
+    username: weatherdb
+    password: weatherdb
+`
+	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
+		t.Fatalf("write temp config: %v", err)
+	}
+
+	cfg, err := Load(path)
+	if err != nil {
+		t.Fatalf("load config: %v", err)
+	}
+	if len(cfg.Databases) != 1 {
+		t.Fatalf("expected one database, got %d", len(cfg.Databases))
+	}
+	if cfg.Databases[0].Name != "weatherdb" {
+		t.Fatalf("unexpected db name %q", cfg.Databases[0].Name)
+	}
+}
+
+func TestLoadMissingRequiredFieldFails(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "config.yml")
+	content := `
+- name: weatherdb
+  driver: postgres
+  params:
+    username: weatherdb
+    password: weatherdb
+`
+	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
+		t.Fatalf("write temp config: %v", err)
+	}
+
+	if _, err := Load(path); err == nil {
+		t.Fatalf("expected validation error for missing params.uri")
+	}
+}