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import { existsSync } from "https://deno.land/std@v0.35.0/fs/mod.ts";import {  assert,  assertEquals,  assertThrows,  assertThrowsAsync} from "https://deno.land/std@v0.35.0/testing/asserts.ts";import { Task, TaskRegistry } from "../lib/tasks.ts";import { DrakeError, env } from "../lib/utils.ts";
export function touch(path: string): void {  Deno.openSync(path, "w");}
Deno.test(  async function taskRegistryTests() {    env["--quiet"] = true;    const taskRegistry = new TaskRegistry();
    assertThrows(      () => taskRegistry.get("quux"),      DrakeError,      "missing task: quux"    );
    let log: string[] = [];    const action = function(this: Task) {      log.push(this.name);    };
    taskRegistry.desc("Task 1");    taskRegistry.register("1", ["2", "3"], action);
    taskRegistry.desc("Task 2");    taskRegistry.register("2", ["3"], action);
    taskRegistry.desc("Task 3");    taskRegistry.register("3", [], action);
    assertEquals(taskRegistry.get("1").desc, "Task 1");    assertEquals(      taskRegistry.resolveDependencies(["1", "3", "2"]).map(task => task.name),      ["3", "2", "1"]    );    await taskRegistry.run("1", "2", "3");    assertEquals(log, ["3", "2", "1"], "execution log mismatch");
    taskRegistry.desc("Task 4");    taskRegistry.register("4", ["1", "4"], action);    taskRegistry.get("2").prereqs.push("4");    await assertThrowsAsync(      async () => await taskRegistry.run("4"),      DrakeError,      "cyclic dependency between '4' and '1', cyclic dependency between '4' and '4'",      "cyclic dependency should throw error"    );  });
Deno.test(  async function fileTaskTest() {    env["--quiet"] = true;    const taskRegistry = new TaskRegistry();
    const target = "./target";    const prereq = "./prereq";    taskRegistry.register(target, [prereq], function() {      touch(target);      throw new DrakeError("file task failure");    });
    const dir = Deno.makeTempDirSync();    const savedCwd = Deno.cwd();    try {      Deno.chdir(dir);      touch(prereq);      let didThrow = false;      try {        await taskRegistry.run(target);      } catch (e) {        didThrow = true;        assertEquals(e.message, "file task failure");        assert(existsSync(prereq));        assert(!existsSync(target), "target should have been deleted");      }      assert(didThrow, "should have thrown error");
      touch(target);      const info = Deno.statSync(target);      didThrow = false;      try {        await taskRegistry.run(target);      } catch (e) {        didThrow = true;        assertEquals(e.message, "file task failure");        assert(existsSync(target));        assert(existsSync(prereq));        assertEquals(          Deno.statSync(target),          info,          "target timestamps should have been reverted"        );      }      assert(didThrow, "should have thrown error");
      // Bump target timestamps to guarantee the file task is up to date.      Deno.utimeSync(target, info.accessed! + 1, info.modified! + 1);      didThrow = false;      try {        await taskRegistry.run(target);      } catch (e) {        didThrow = true;      }      assert(!didThrow, "should be up to date and skipped execution");    } finally {      Deno.chdir(savedCwd);      Deno.removeSync(dir, { recursive: true });    }  });