refactor(app): extract terminal runtime out of react lifecycle

2026-02-15 15:40:18 +07:00
parent 9244f1fbd6
commit adb511d2be
10 changed files with 1858 additions and 629 deletions
@@ -0,0 +1,42 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  appendTerminalOutputBuffer,
+  createTerminalOutputBuffer,
+  readTerminalOutputBuffer,
+} from "./terminal-output-buffer";
+
+describe("terminal-output-buffer", () => {
+  it("keeps appended text within max chars without rebuilding from scratch", () => {
+    const buffer = createTerminalOutputBuffer();
+
+    appendTerminalOutputBuffer({ buffer, text: "abc", maxChars: 5 });
+    appendTerminalOutputBuffer({ buffer, text: "de", maxChars: 5 });
+
+    expect(readTerminalOutputBuffer({ buffer })).toBe("abcde");
+
+    appendTerminalOutputBuffer({ buffer, text: "f", maxChars: 5 });
+    expect(readTerminalOutputBuffer({ buffer })).toBe("bcdef");
+
+    appendTerminalOutputBuffer({ buffer, text: "gh", maxChars: 5 });
+    expect(readTerminalOutputBuffer({ buffer })).toBe("defgh");
+  });
+
+  it("ignores empty appends and preserves current content", () => {
+    const buffer = createTerminalOutputBuffer();
+    appendTerminalOutputBuffer({ buffer, text: "hello", maxChars: 10 });
+    appendTerminalOutputBuffer({ buffer, text: "", maxChars: 10 });
+
+    expect(readTerminalOutputBuffer({ buffer })).toBe("hello");
+  });
+
+  it("handles large overflow by trimming entire leading segments", () => {
+    const buffer = createTerminalOutputBuffer();
+
+    appendTerminalOutputBuffer({ buffer, text: "12345", maxChars: 8 });
+    appendTerminalOutputBuffer({ buffer, text: "6789", maxChars: 8 });
+    appendTerminalOutputBuffer({ buffer, text: "ABCDEF", maxChars: 8 });
+
+    expect(readTerminalOutputBuffer({ buffer })).toBe("89ABCDEF");
+  });
+});