refactor(packages): extract utils package

packages/utils/src/jsonc-parser.memoization.test.ts

@@ -0,0 +1,57 @@
+import { afterEach, describe, expect, mock, spyOn, test } from "bun:test"
+import * as fs from "node:fs"
+import { join } from "node:path"
+
+const pluginConfigDetectionOptions = {
+  basenames: ["oh-my-openagent"],
+  legacyBasenames: ["oh-my-opencode"],
+} as const
+
+describe("detectPluginConfigFile memoization", () => {
+  const testDir = join(__dirname, ".test-detect-plugin-memoization")
+
+  afterEach(() => {
+    mock.restore()
+  })
+
+  test("returns cached result on repeated calls for the same directory", async () => {
+    // given
+    const existsSync = spyOn(fs, "existsSync").mockImplementation((filePath: fs.PathLike) => {
+      return String(filePath).endsWith("oh-my-openagent.jsonc")
+    })
+    const readdirSync = spyOn(fs, "readdirSync").mockImplementation(() => [])
+
+    const parserModule = await import(`./jsonc-parser?memoization=${Date.now()}-${Math.random()}`)
+
+    // when
+    const firstResult = parserModule.detectPluginConfigFile(testDir, pluginConfigDetectionOptions)
+    const callsAfterFirstResult = existsSync.mock.calls.length
+    const secondResult = parserModule.detectPluginConfigFile(testDir, pluginConfigDetectionOptions)
+
+    // then
+    expect(firstResult).toEqual(secondResult)
+    expect(existsSync.mock.calls.length).toBe(callsAfterFirstResult)
+    expect(readdirSync).toHaveBeenCalledTimes(0)
+  })
+
+  test("clears cached result when requested", async () => {
+    // given
+    const existsSync = spyOn(fs, "existsSync").mockImplementation((filePath: fs.PathLike) => {
+      return String(filePath).endsWith("oh-my-openagent.jsonc")
+    })
+    const readdirSync = spyOn(fs, "readdirSync").mockImplementation(() => [])
+
+    const parserModule = await import(`./jsonc-parser?memoization=${Date.now()}-${Math.random()}`)
+
+    parserModule.detectPluginConfigFile(testDir, pluginConfigDetectionOptions)
+    parserModule.clearPluginConfigFileDetectionCache()
+    const callsAfterClear = existsSync.mock.calls.length
+
+    // when
+    parserModule.detectPluginConfigFile(testDir, pluginConfigDetectionOptions)
+
+    // then
+    expect(existsSync.mock.calls.length).toBeGreaterThan(callsAfterClear)
+    expect(readdirSync).toHaveBeenCalledTimes(0)
+  })
+})