Feature/#183 save user recent searches (last 5)

front/src/pods/embalse-search/components/recent-searches/recentSearches.bussiness.spec.ts

@@ -0,0 +1,166 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { EmbalseSearchModel } from "../../embalse-search.vm";
+import {
+  addNewSearchEntry,
+  getStoredSearches,
+} from "./recentSearches.bussiness";
+
+// MOCK LOCALSTORAGE
+
+let store: Record<string, string> = {};
+
+const localStorageMock = {
+  getItem: (key: string) => store[key] || null,
+  setItem: (key: string, value: string) => {
+    store[key] = value.toString();
+  },
+  clear: () => {
+    store = {};
+  },
+  removeItem: (key: string) => {
+    delete store[key];
+  },
+};
+
+Object.defineProperty(globalThis, "localStorage", {
+  value: localStorageMock,
+  writable: true,
+});
+
+describe("recentSearches business logic", () => {
+  it("should add an entry to an empty list", () => {
+    // ARRANGE
+    const embalseList: EmbalseSearchModel[] = [];
+    const newSearch: EmbalseSearchModel = {
+      slug: "cenajo",
+      name: "Cenajo (Albacete)",
+    };
+
+    // ACT
+    const result = addNewSearchEntry(newSearch, embalseList);
+
+    // ASSERT
+    expect(result).toHaveLength(1);
+    expect(result[0].slug).toBe("cenajo");
+  });
+
+  it("should move a repeated element to the beginning without duplicating it", () => {
+
+    // ARRANGE
+    const embalseList: EmbalseSearchModel[] = [
+      { slug: "gonzalez-lacasa", name: "González Lacasa (La Rioja)" },
+      { slug: "chanza", name: "Chanza (Huelva)" },
+      { slug: "cenajo", name: "Cenajo (Albacete)" },
+    ];
+    const newSearch: EmbalseSearchModel = {
+      slug: "cenajo",
+      name: "Cenajo (Albacete)",
+    };
+
+    // ACT
+    const result = addNewSearchEntry(newSearch, embalseList);
+
+    // ASSERT
+    expect(result).toHaveLength(3);
+    expect(result[0]).toEqual(newSearch);
+    expect(result[2].slug).toBe("chanza");
+  });
+
+  it("should add the new element to the beginning and remove the oldest one if the array has 5 elements", () => {
+
+    // ARRANGE
+    const embalseList: EmbalseSearchModel[] = [
+      { slug: "gonzalez-lacasa", name: "González Lacasa (La Rioja)" },
+      { slug: "chanza", name: "Chanza (Huelva)" },
+      { slug: "loteta-la", name: "Loteta (La) (Zaragoza)" },
+      { slug: "mequinenza", name: "Mequinenza (Zaragoza)" },
+      { slug: "certescans", name: "Certescáns (Lleida)" },
+    ];
+    const newSearch: EmbalseSearchModel = {
+      slug: "cenajo",
+      name: "Cenajo (Albacete)",
+    };
+
+    // ACT
+    const result = addNewSearchEntry(newSearch, embalseList);
+
+    // ASSERT
+    expect(result).toHaveLength(5);
+    expect(result[0].slug).toBe(newSearch.slug);
+    expect(result.some((e) => e.slug === newSearch.slug));
+    expect(result[4].slug).toBe("mequinenza");
+  });
+
+  it("should add an entry to a list that already has elements but is not full", () => {
+
+    // ARRANGE
+    const embalseList: EmbalseSearchModel[] = [
+      { slug: "gonzalez-lacasa", name: "González Lacasa (La Rioja)" },
+    ];
+    const newSearch: EmbalseSearchModel = {
+      slug: "cenajo",
+      name: "Cenajo (Albacete)",
+    };
+
+    // ACT
+    const result = addNewSearchEntry(newSearch, embalseList);
+
+    // ASSERT
+    expect(result).toHaveLength(2);
+    expect(result[0].slug).toBe("cenajo");
+    expect(result[1].slug).toBe("gonzalez-lacasa");
+  });
+});
+
+describe("getStoredSearches", () => {
+
+  beforeEach(() => {
+    localStorage.clear();
+  });
+
+  it("should return an array with 5 indices", () => {
+
+    // ARRANGE:
+    localStorage.setItem(
+      "recent-searches",
+      JSON.stringify([
+        { slug: "loteta-la", name: "Loteta (La) (Zaragoza)" },
+        { slug: "gonzalez-lacasa", name: "González Lacasa (La Rioja)" },
+        { slug: "chanza", name: "Chanza (Huelva)" },
+        { slug: "cenajo", name: "Cenajo (Albacete)" },
+        { slug: "mequinenza", name: "Mequinenza (Zaragoza)" },
+      ]),
+    );
+
+    // ACT
+    const result = getStoredSearches();
+
+    // ASSERT
+    expect(result).toHaveLength(5);
+    expect(result[0].slug).toEqual("loteta-la");
+  });
+
+  it("should return an empty array if localStorage is empty", () => {
+    // ARRANGE:
+    localStorage.clear();
+
+    // ACT
+    const result = getStoredSearches();
+
+    // ASSERT
+    expect(result).toEqual([]);
+  });
+
+  it("should return an empty array when localStorage data is invalid", () => {
+    // ARRANGE:
+    localStorageMock.setItem("recent-searches", "invalid-data");
+    const spyConsole = vi.spyOn(console, "log").mockImplementation(() => {});
+
+    // ACT
+    const result = getStoredSearches();
+
+    // ASSERT
+    expect(result).toEqual([]);
+    expect(spyConsole).toHaveBeenCalled();
+  });
+});