48 lines
1.6 KiB
TypeScript
48 lines
1.6 KiB
TypeScript
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import { afterEach, describe, expect, it, mock } from "bun:test";
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describe("findProjectRoot", () => {
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afterEach(async () => {
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const actualFileSystem = await import("node:fs");
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mock.module("node:fs", () => actualFileSystem);
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});
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it("memoizes repeated lookups for the same start path and resets on cache clear", async () => {
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// given
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const actualFileSystem = await import("node:fs");
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const projectRoot = "/workspace/project";
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const startPath = `${projectRoot}/src/file.ts`;
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const packageJsonPath = `${projectRoot}/package.json`;
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const existsSyncSpy = mock((path: string) => path === packageJsonPath);
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const statSyncSpy = mock(() => ({ isDirectory: () => false }));
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mock.module("node:fs", () => ({
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...actualFileSystem,
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existsSync: existsSyncSpy,
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statSync: statSyncSpy,
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}));
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const { clearProjectRootCache, findProjectRoot } = await import(
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`./project-root-finder.ts?memoization=${Date.now()}`
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);
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// when
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const firstResult = findProjectRoot(startPath);
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const firstExistsSyncCallCount = existsSyncSpy.mock.calls.length;
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const secondResult = findProjectRoot(startPath);
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const secondExistsSyncCallCount = existsSyncSpy.mock.calls.length;
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clearProjectRootCache();
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const thirdResult = findProjectRoot(startPath);
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// then
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expect(firstResult).toBe(projectRoot);
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expect(secondResult).toBe(projectRoot);
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expect(thirdResult).toBe(projectRoot);
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expect(firstExistsSyncCallCount).toBeGreaterThan(0);
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expect(secondExistsSyncCallCount).toBe(firstExistsSyncCallCount);
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expect(existsSyncSpy).toHaveBeenCalledTimes(firstExistsSyncCallCount * 2);
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});
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});
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