test(memory): dedupe temp-dir lifecycle hooks and cover overlapping path dedupe

src/memory/internal.test.ts

@@ -10,6 +10,17 @@ import {
   remapChunkLines,
 } from "./internal.js";
 
+function setupTempDirLifecycle(prefix: string): () => string {
+  let tmpDir = "";
+  beforeEach(async () => {
+    tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), prefix));
+  });
+  afterEach(async () => {
+    await fs.rm(tmpDir, { recursive: true, force: true });
+  });
+  return () => tmpDir;
+}
+
 describe("normalizeExtraMemoryPaths", () => {
   it("trims, resolves, and dedupes paths", () => {
     const workspaceDir = path.join(os.tmpdir(), "memory-test-workspace");
@@ -26,17 +37,10 @@ describe("normalizeExtraMemoryPaths", () => {
 });
 
 describe("listMemoryFiles", () => {
-  let tmpDir: string;
+  const getTmpDir = setupTempDirLifecycle("memory-test-");
-
-  beforeEach(async () => {
-    tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), "memory-test-"));
-  });
-
-  afterEach(async () => {
-    await fs.rm(tmpDir, { recursive: true, force: true });
-  });
 
   it("includes files from additional paths (directory)", async () => {
+    const tmpDir = getTmpDir();
     await fs.writeFile(path.join(tmpDir, "MEMORY.md"), "# Default memory");
     const extraDir = path.join(tmpDir, "extra-notes");
     await fs.mkdir(extraDir, { recursive: true });
@@ -53,6 +57,7 @@ describe("listMemoryFiles", () => {
   });
 
   it("includes files from additional paths (single file)", async () => {
+    const tmpDir = getTmpDir();
     await fs.writeFile(path.join(tmpDir, "MEMORY.md"), "# Default memory");
     const singleFile = path.join(tmpDir, "standalone.md");
     await fs.writeFile(singleFile, "# Standalone");
@@ -63,6 +68,7 @@ describe("listMemoryFiles", () => {
   });
 
   it("handles relative paths in additional paths", async () => {
+    const tmpDir = getTmpDir();
     await fs.writeFile(path.join(tmpDir, "MEMORY.md"), "# Default memory");
     const extraDir = path.join(tmpDir, "subdir");
     await fs.mkdir(extraDir, { recursive: true });
@@ -74,6 +80,7 @@ describe("listMemoryFiles", () => {
   });
 
   it("ignores non-existent additional paths", async () => {
+    const tmpDir = getTmpDir();
     await fs.writeFile(path.join(tmpDir, "MEMORY.md"), "# Default memory");
 
     const files = await listMemoryFiles(tmpDir, ["/does/not/exist"]);
@@ -81,6 +88,7 @@ describe("listMemoryFiles", () => {
   });
 
   it("ignores symlinked files and directories", async () => {
+    const tmpDir = getTmpDir();
     await fs.writeFile(path.join(tmpDir, "MEMORY.md"), "# Default memory");
     const extraDir = path.join(tmpDir, "extra");
     await fs.mkdir(extraDir, { recursive: true });
@@ -115,20 +123,21 @@ describe("listMemoryFiles", () => {
       expect(files.some((file) => file.endsWith("nested.md"))).toBe(false);
     }
   });
+
+  it("dedupes overlapping extra paths that resolve to the same file", async () => {
+    const tmpDir = getTmpDir();
+    await fs.writeFile(path.join(tmpDir, "MEMORY.md"), "# Default memory");
+    const files = await listMemoryFiles(tmpDir, [tmpDir, ".", path.join(tmpDir, "MEMORY.md")]);
+    const memoryMatches = files.filter((file) => file.endsWith("MEMORY.md"));
+    expect(memoryMatches).toHaveLength(1);
+  });
 });
 
 describe("buildFileEntry", () => {
-  let tmpDir: string;
+  const getTmpDir = setupTempDirLifecycle("memory-build-entry-");
-
-  beforeEach(async () => {
-    tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), "memory-build-entry-"));
-  });
-
-  afterEach(async () => {
-    await fs.rm(tmpDir, { recursive: true, force: true });
-  });
 
   it("returns null when the file disappears before reading", async () => {
+    const tmpDir = getTmpDir();
     const target = path.join(tmpDir, "ghost.md");
     await fs.writeFile(target, "ghost", "utf-8");
     await fs.rm(target);
@@ -137,6 +146,7 @@ describe("buildFileEntry", () => {
   });
 
   it("returns metadata when the file exists", async () => {
+    const tmpDir = getTmpDir();
     const target = path.join(tmpDir, "note.md");
     await fs.writeFile(target, "hello", "utf-8");
     const entry = await buildFileEntry(target, tmpDir);