import { describe, expect, it } from "vitest"; import { buildTurnDiffTree, summarizeTurnDiffStats } from "./turnDiffTree"; describe("summarizeTurnDiffStats", () => {  it("sums only files with numeric additions/deletions", () => {    const stat = summarizeTurnDiffStats([      { path: "README.md", additions: 3, deletions: 1 },      { path: "docs/notes.md" },      { path: "src/index.ts", additions: 5, deletions: 2 },    ]);     expect(stat).toEqual({ additions: 8, deletions: 3 });  });}); describe("buildTurnDiffTree", () => {  it("builds nested directory nodes with aggregated stats", () => {    const tree = buildTurnDiffTree([      { path: "src/index.ts", additions: 2, deletions: 1 },      { path: "src/components/Button.tsx", additions: 4, deletions: 2 },      { path: "README.md", additions: 1, deletions: 0 },    ]);     expect(tree).toEqual([      {        kind: "directory",        name: "src",        path: "src",        stat: { additions: 6, deletions: 3 },        children: [          {            kind: "directory",            name: "components",            path: "src/components",            stat: { additions: 4, deletions: 2 },            children: [              {                kind: "file",                name: "Button.tsx",                path: "src/components/Button.tsx",                stat: { additions: 4, deletions: 2 },              },            ],          },          {            kind: "file",            name: "index.ts",            path: "src/index.ts",            stat: { additions: 2, deletions: 1 },          },        ],      },      {        kind: "file",        name: "README.md",        path: "README.md",        stat: { additions: 1, deletions: 0 },      },    ]);  });   it("keeps files without stat values and excludes them from directory totals", () => {    const tree = buildTurnDiffTree([      { path: "docs/notes.md" },      { path: "docs/todo.md", additions: 1, deletions: 1 },    ]);     expect(tree).toEqual([      {        kind: "directory",        name: "docs",        path: "docs",        stat: { additions: 1, deletions: 1 },        children: [          {            kind: "file",            name: "notes.md",            path: "docs/notes.md",            stat: null,          },          {            kind: "file",            name: "todo.md",            path: "docs/todo.md",            stat: { additions: 1, deletions: 1 },          },        ],      },    ]);  });   it("normalizes file paths with windows separators", () => {    const tree = buildTurnDiffTree([{ path: "apps\\web\\src\\index.ts", additions: 2, deletions: 1 }]);     expect(tree).toEqual([      {        kind: "directory",        name: "apps/web/src",        path: "apps/web/src",        stat: { additions: 2, deletions: 1 },        children: [          {            kind: "file",            name: "index.ts",            path: "apps/web/src/index.ts",            stat: { additions: 2, deletions: 1 },          },        ],      },    ]);  });   it("compacts only single-directory chains and stops at branch points", () => {    const tree = buildTurnDiffTree([      { path: "apps/server/src/index.ts", additions: 2, deletions: 1 },      { path: "apps/server/main.ts", additions: 4, deletions: 0 },    ]);     expect(tree).toEqual([      {        kind: "directory",        name: "apps/server",        path: "apps/server",        stat: { additions: 6, deletions: 1 },        children: [          {            kind: "directory",            name: "src",            path: "apps/server/src",            stat: { additions: 2, deletions: 1 },            children: [              {                kind: "file",                name: "index.ts",                path: "apps/server/src/index.ts",                stat: { additions: 2, deletions: 1 },              },            ],          },          {            kind: "file",            name: "main.ts",            path: "apps/server/main.ts",            stat: { additions: 4, deletions: 0 },          },        ],      },    ]);  });   it("preserves leading/trailing whitespace in path segments", () => {    const tree = buildTurnDiffTree([      { path: "a/file.ts", additions: 1, deletions: 0 },      { path: " a/file.ts", additions: 2, deletions: 0 },    ]);     expect(tree).toHaveLength(2);    const directoryNodes = tree.filter(      (node): node is Extract<(typeof tree)[number], { kind: "directory" }> => node.kind === "directory",    );    expect(directoryNodes.map((node) => node.name).toSorted()).toEqual([" a", "a"]);    expect(directoryNodes.map((node) => node.path).toSorted()).toEqual([" a", "a"]);  });});