feat: purge import history by retention

server/importLogRetention.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from "vitest";
+import {
+  IMPORT_LOG_RETENTION_OPTIONS,
+  getImportLogRetentionCutoff,
+  isImportLogRetentionMonths,
+} from "@shared/importLogRetention";
+
+describe("rétention des journaux d'import", () => {
+  it("propose uniquement les périodes de purge autorisées", () => {
+    expect(IMPORT_LOG_RETENTION_OPTIONS).toEqual([3, 6, 12]);
+    expect(isImportLogRetentionMonths(3)).toBe(true);
+    expect(isImportLogRetentionMonths(6)).toBe(true);
+    expect(isImportLogRetentionMonths(12)).toBe(true);
+    expect(isImportLogRetentionMonths(9)).toBe(false);
+  });
+
+  it("calcule une date limite calendaire sans modifier la date de référence", () => {
+    const now = new Date("2026-10-09T12:00:00.000Z");
+    const cutoff = getImportLogRetentionCutoff(6, now);
+
+    expect(cutoff.toISOString()).toBe("2026-04-09T12:00:00.000Z");
+    expect(now.toISOString()).toBe("2026-10-09T12:00:00.000Z");
+  });
+});