claude-code/packages/builtin-tools/src/tools/BashTool/__tests__/commandSemantics.test.ts

import { describe, expect, test } from "bun:test";

const { interpretCommandResult } = await import("../commandSemantics");

describe("interpretCommandResult", () => {
  // ─── Default semantics ────────────────────────────────────────────
  test("exit 0 is not an error for unknown commands", () => {
    const result = interpretCommandResult("echo hello", 0, "hello", "");
    expect(result.isError).toBe(false);
  });

  test("non-zero exit is an error for unknown commands", () => {
    const result = interpretCommandResult("echo hello", 1, "", "fail");
    expect(result.isError).toBe(true);
    expect(result.message).toContain("exit code 1");
  });

  // ─── grep semantics ──────────────────────────────────────────────
  test("grep exit 0 is not an error", () => {
    const result = interpretCommandResult("grep pattern file", 0, "match", "");
    expect(result.isError).toBe(false);
  });

  test("grep exit 1 means no matches (not error)", () => {
    const result = interpretCommandResult("grep pattern file", 1, "", "");
    expect(result.isError).toBe(false);
    expect(result.message).toBe("No matches found");
  });

  test("grep exit 2 is an error", () => {
    const result = interpretCommandResult("grep pattern file", 2, "", "err");
    expect(result.isError).toBe(true);
  });

  // ─── diff semantics ──────────────────────────────────────────────
  test("diff exit 1 means files differ (not error)", () => {
    const result = interpretCommandResult("diff a.txt b.txt", 1, "diff", "");
    expect(result.isError).toBe(false);
    expect(result.message).toBe("Files differ");
  });

  test("diff exit 2 is an error", () => {
    const result = interpretCommandResult("diff a.txt b.txt", 2, "", "err");
    expect(result.isError).toBe(true);
  });

  // ─── test/[ semantics ────────────────────────────────────────────
  test("test exit 1 means condition false (not error)", () => {
    const result = interpretCommandResult("test -f nofile", 1, "", "");
    expect(result.isError).toBe(false);
    expect(result.message).toBe("Condition is false");
  });

  // ─── piped commands ──────────────────────────────────────────────
  test("uses last command in pipe for semantics", () => {
    // "cat file | grep pattern" → last command is "grep pattern"
    const result = interpretCommandResult(
      "cat file | grep pattern",
      1,
      "",
      ""
    );
    expect(result.isError).toBe(false);
    expect(result.message).toBe("No matches found");
  });

  // ─── rg (ripgrep) semantics ──────────────────────────────────────
  test("rg exit 1 means no matches (not error)", () => {
    const result = interpretCommandResult("rg pattern", 1, "", "");
    expect(result.isError).toBe(false);
    expect(result.message).toBe("No matches found");
  });

  // ─── find semantics ──────────────────────────────────────────────
  test("find exit 1 is partial success", () => {
    const result = interpretCommandResult("find . -name '*.ts'", 1, "", "");
    expect(result.isError).toBe(false);
    expect(result.message).toBe("Some directories were inaccessible");
  });
});