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apps/miniprogram/pages/terminal/terminalSnapshotCodec.test.ts

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+import { describe, expect, it } from "vitest";
+
+const {
+  createBlankCell,
+  createContinuationCell,
+  createTerminalCell,
+  lineCellsToText
+} = require("./terminalCursorModel.js");
+const {
+  deserializeTerminalSnapshotRows,
+  serializeTerminalSnapshotRows
+} = require("./terminalSnapshotCodec.js");
+
+describe("terminalSnapshotCodec", () => {
+  it("会用压缩 run 快照往返恢复 ANSI 样式与占位空白", () => {
+    const styleA = { fg: "#ff5f56", bg: "#1f2937", bold: true, underline: false };
+    const styleB = { fg: "#5bd2ff", bg: "", bold: false, underline: true };
+    const rows = [
+      [
+        createTerminalCell("E", styleA, 1),
+        createTerminalCell("R", styleA, 1),
+        createTerminalCell("R", styleA, 1),
+        createBlankCell(styleA),
+        createTerminalCell("中", styleB, 2),
+        createContinuationCell(styleB),
+        createTerminalCell("A", styleB, 1)
+      ]
+    ];
+
+    const snapshot = serializeTerminalSnapshotRows(rows);
+    const restored = deserializeTerminalSnapshotRows(snapshot.styledLines, snapshot.styleTable);
+    const restoredRow = restored[0] || [];
+
+    expect(lineCellsToText(restoredRow)).toBe("ERR 中A");
+    expect(restoredRow[0]?.style).toEqual(styleA);
+    expect(restoredRow[3]?.placeholder).toBe(true);
+    expect(restoredRow[3]?.style).toEqual(styleA);
+    expect(restoredRow[4]?.style).toEqual(styleB);
+    expect(restoredRow[5]?.continuation).toBe(true);
+    expect(restoredRow[6]?.style).toEqual(styleB);
+  });
+});