chore: import upstream snapshot with attribution

internal/util/orderedmap/orderedmap_test.go

@@ -0,0 +1,83 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package orderedmap
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestRowMarshalJSON(t *testing.T) {
+	tests := []struct {
+		name    string
+		row     Row
+		want    string
+		wantErr bool
+	}{
+		{
+			name: "Simple row",
+			row: Row{
+				Columns: []Column{
+					{Name: "A", Value: 1},
+					{Name: "B", Value: "two"},
+					{Name: "C", Value: true},
+				},
+			},
+			want:    `{"A":1,"B":"two","C":true}`,
+			wantErr: false,
+		},
+		{
+			name: "Row with different order",
+			row: Row{
+				Columns: []Column{
+					{Name: "C", Value: true},
+					{Name: "A", Value: 1},
+					{Name: "B", Value: "two"},
+				},
+			},
+			want:    `{"C":true,"A":1,"B":"two"}`,
+			wantErr: false,
+		},
+		{
+			name:    "Empty row",
+			row:     Row{},
+			want:    `{}`,
+			wantErr: false,
+		},
+		{
+			name: "Row with nil value",
+			row: Row{
+				Columns: []Column{
+					{Name: "A", Value: 1},
+					{Name: "B", Value: nil},
+				},
+			},
+			want:    `{"A":1,"B":null}`,
+			wantErr: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := json.Marshal(tt.row)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("Row.MarshalJSON() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if string(got) != tt.want {
+				t.Errorf("Row.MarshalJSON() = %s, want %s", string(got), tt.want)
+			}
+		})
+	}
+}