import { describe, expect, it } from "vitest"; import {  selectionTouchesMentionBoundary,  splitPromptIntoComposerSegments,} from "./composer-editor-mentions";import { INLINE_TERMINAL_CONTEXT_PLACEHOLDER } from "./lib/terminalContext"; describe("splitPromptIntoComposerSegments", () => {  it("splits mention tokens followed by whitespace into mention segments", () => {    expect(splitPromptIntoComposerSegments("Inspect @AGENTS.md please")).toEqual([      { type: "text", text: "Inspect " },      { type: "mention", path: "AGENTS.md" },      { type: "text", text: " please" },    ]);  });   it("does not convert an incomplete trailing mention token", () => {    expect(splitPromptIntoComposerSegments("Inspect @AGENTS.md")).toEqual([      { type: "text", text: "Inspect @AGENTS.md" },    ]);  });   it("keeps newlines around mention tokens", () => {    expect(splitPromptIntoComposerSegments("one\n@src/index.ts \ntwo")).toEqual([      { type: "text", text: "one\n" },      { type: "mention", path: "src/index.ts" },      { type: "text", text: " \ntwo" },    ]);  });   it("splits skill tokens followed by whitespace into skill segments", () => {    expect(splitPromptIntoComposerSegments("Use $review-follow-up please")).toEqual([      { type: "text", text: "Use " },      { type: "skill", name: "review-follow-up" },      { type: "text", text: " please" },    ]);  });   it("does not convert an incomplete trailing skill token", () => {    expect(splitPromptIntoComposerSegments("Use $review-follow-up")).toEqual([      { type: "text", text: "Use $review-follow-up" },    ]);  });   it("keeps inline terminal context placeholders at their prompt positions", () => {    expect(      splitPromptIntoComposerSegments(        `Inspect ${INLINE_TERMINAL_CONTEXT_PLACEHOLDER}@AGENTS.md please`,      ),    ).toEqual([      { type: "text", text: "Inspect " },      { type: "terminal-context", context: null },      { type: "mention", path: "AGENTS.md" },      { type: "text", text: " please" },    ]);  });   it("preserves consecutive terminal context placeholders without dropping positions", () => {    expect(      splitPromptIntoComposerSegments(        `${INLINE_TERMINAL_CONTEXT_PLACEHOLDER}${INLINE_TERMINAL_CONTEXT_PLACEHOLDER}tail`,      ),    ).toEqual([      { type: "terminal-context", context: null },      { type: "terminal-context", context: null },      { type: "text", text: "tail" },    ]);  });   it("keeps skill parsing alongside mentions and terminal placeholders", () => {    expect(      splitPromptIntoComposerSegments(        `Inspect ${INLINE_TERMINAL_CONTEXT_PLACEHOLDER}$review-follow-up after @AGENTS.md `,      ),    ).toEqual([      { type: "text", text: "Inspect " },      { type: "terminal-context", context: null },      { type: "skill", name: "review-follow-up" },      { type: "text", text: " after " },      { type: "mention", path: "AGENTS.md" },      { type: "text", text: " " },    ]);  });}); describe("selectionTouchesMentionBoundary", () => {  it("returns true when selection includes the whitespace after a mention", () => {    expect(      selectionTouchesMentionBoundary(        "hi @package.json there",        "hi @package.json".length,        "hi @package.json there".length,      ),    ).toBe(true);  });   it("returns true when selection includes the whitespace before a mention", () => {    expect(      selectionTouchesMentionBoundary(        "hi there @package.json later",        "hi there".length,        "hi there ".length,      ),    ).toBe(true);  });   it("returns false when selection starts after the mention boundary whitespace", () => {    expect(      selectionTouchesMentionBoundary(        "hi @package.json there",        "hi @package.json ".length,        "hi @package.json there".length,      ),    ).toBe(false);  });   it("returns true when selection includes whitespace after a mention following a terminal placeholder", () => {    const prompt = `${INLINE_TERMINAL_CONTEXT_PLACEHOLDER}@AGENTS.md there`;    expect(      selectionTouchesMentionBoundary(        prompt,        `${INLINE_TERMINAL_CONTEXT_PLACEHOLDER}@AGENTS.md`.length,        prompt.length,      ),    ).toBe(true);  });});