refactor(*): 平台架构 - 拆分后端领域模块并同步插件协议与模型能力

backend/internal/platform/json_fields_test.go

@@ -0,0 +1,63 @@
+package platform
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestOptionalJSONStringRejectsWrongType(t *testing.T) {
+	payload := map[string]any{"id": 12.0, "status": "ok"}
+
+	text, err := OptionalJSONString(payload, "status")
+	if err != nil || text != "ok" {
+		t.Fatalf("OptionalJSONString(status) = %q, %v", text, err)
+	}
+
+	text, err = OptionalJSONString(payload, "missing")
+	if err != nil || text != "" {
+		t.Fatalf("OptionalJSONString(missing) = %q, %v", text, err)
+	}
+
+	_, err = OptionalJSONString(payload, "id")
+	if err == nil || !strings.Contains(err.Error(), "expected string") || !strings.Contains(err.Error(), "float64") {
+		t.Fatalf("OptionalJSONString(id) error = %v", err)
+	}
+}
+
+func TestRequireJSONString(t *testing.T) {
+	payload := map[string]any{"id": "task-1", "empty": "  "}
+
+	text, err := RequireJSONString(payload, "id")
+	if err != nil || text != "task-1" {
+		t.Fatalf("RequireJSONString(id) = %q, %v", text, err)
+	}
+
+	_, err = RequireJSONString(payload, "empty")
+	if err == nil || !strings.Contains(err.Error(), "missing field: empty") {
+		t.Fatalf("RequireJSONString(empty) error = %v", err)
+	}
+
+	_, err = RequireJSONString(map[string]any{"id": true}, "id")
+	if err == nil || !strings.Contains(err.Error(), "expected string") {
+		t.Fatalf("RequireJSONString(bool) error = %v", err)
+	}
+}
+
+func TestFirstJSONStringPrefersValidStringOverWrongType(t *testing.T) {
+	payload := map[string]any{"id": 99.0, "task_id": "abc"}
+
+	text, err := FirstJSONString(payload, "id", "task_id")
+	if err != nil || text != "abc" {
+		t.Fatalf("FirstJSONString() = %q, %v", text, err)
+	}
+
+	_, err = FirstJSONString(payload, "id", "request_id")
+	if err == nil || !strings.Contains(err.Error(), "field id") {
+		t.Fatalf("FirstJSONString() error = %v", err)
+	}
+
+	text, err = FirstJSONString(payload, "missing", "also-missing")
+	if err != nil || text != "" {
+		t.Fatalf("FirstJSONString(missing) = %q, %v", text, err)
+	}
+}