From c23272db38a464378368c143740f0d8e95143e1f Mon Sep 17 00:00:00 2001
From: Donghyeon Kim <0916dhkim@gmail.com>
Date: Mon, 23 Mar 2020 17:04:41 -0400
Subject: [PATCH] History In Most Recent Order

---
 .../users_view/history_edit_form.spec.tsx     | 143 ++++++++++++++++++
 src/renderer/users_view/history_edit_form.tsx |  51 ++++---
 2 files changed, 174 insertions(+), 20 deletions(-)
 create mode 100644 src/renderer/users_view/history_edit_form.spec.tsx

diff --git a/src/renderer/users_view/history_edit_form.spec.tsx b/src/renderer/users_view/history_edit_form.spec.tsx
new file mode 100644
index 0000000..3e61bb3
--- /dev/null
+++ b/src/renderer/users_view/history_edit_form.spec.tsx
@@ -0,0 +1,143 @@
+import * as React from "react";
+import { describe, it, afterEach } from "mocha";
+import { expect } from "chai";
+import { HistoryEditFormProps, HistoryEditForm } from "./history_edit_form";
+import {
+  render,
+  RenderResult,
+  queries,
+  cleanup,
+  within,
+  prettyDOM,
+  waitFor
+} from "@testing-library/react";
+import { AppDataContext } from "../app_data_context";
+import { AppData, createAppData } from "../../common/persistence/app_data";
+import { User } from "../../common/persistence/user";
+import { Book } from "../../common/persistence/book";
+import { assertWrapper } from "../../common/assert_wrapper";
+import * as moment from "moment";
+import * as sinon from "sinon";
+
+/**
+ * Find a history list element by matching regex.
+ * Throw if search failed or more than one element matches.
+ */
+export function getHistoryListElementByText(
+  container: HTMLElement,
+  text: RegExp
+): HTMLElement {
+  const ret = within(container)
+    .queryAllByTestId("history-list-element")
+    .filter(historyListElement => historyListElement.textContent?.match(text));
+  if (ret.length === 0) {
+    throw new Error(
+      [`No history list element matching ${text}`, prettyDOM(container)].join(
+        "\n\n"
+      )
+    );
+  } else if (ret.length > 1) {
+    throw new Error(
+      [
+        `${ret.length} tag list elements matching ${text}`,
+        prettyDOM(container)
+      ].join("\n\n")
+    );
+  }
+  return ret[0];
+}
+
+/**
+ * Find all history list elements.
+ */
+export function queryAllHistoryListElement(
+  container: HTMLElement
+): Array<HTMLElement> {
+  return within(container).queryAllByTestId("history-list-element");
+}
+
+/**
+ * Wrapper function for render.
+ */
+export function renderHistoryEditForm(
+  appData: AppData,
+  setAppData: (x: AppData) => void,
+  props: HistoryEditFormProps
+): RenderResult<typeof queries> {
+  return render(
+    <AppDataContext.Provider
+      value={{
+        appData: appData,
+        setAppData: setAppData
+      }}
+    >
+      <HistoryEditForm {...props} />
+    </AppDataContext.Provider>
+  );
+}
+
+describe("HistoryEditForm", function() {
+  afterEach(function() {
+    cleanup();
+  });
+
+  it("Display Most Recent History First", async function() {
+    const user: User = {
+      id: 6,
+      firstName: "Natalie",
+      lastName: "Nason"
+    };
+    const bookA: Book = {
+      id: 1,
+      title: "A",
+      author: "A"
+    };
+    const bookB: Book = {
+      id: 2,
+      title: "B",
+      author: "B"
+    };
+    const bookC: Book = {
+      id: 3,
+      title: "C",
+      author: "C"
+    };
+    const appData = createAppData({
+      users: [user],
+      books: [bookA, bookB, bookC],
+      views: [
+        {
+          id: 1000,
+          userId: 6,
+          bookId: 2,
+          date: moment.utc("20070303").valueOf()
+        },
+        {
+          id: 2000,
+          userId: 6,
+          bookId: 1,
+          date: moment.utc("20080303").valueOf()
+        },
+        {
+          id: 3000,
+          userId: 6,
+          bookId: 3,
+          date: moment.utc("20090303").valueOf()
+        }
+      ]
+    });
+    assertWrapper(appData);
+    const { container } = renderHistoryEditForm(appData, sinon.fake(), {
+      user: user
+    });
+    return waitFor(() => {
+      const actual = queryAllHistoryListElement(container).map(
+        element => element.textContent
+      );
+      expect(actual).to.have.lengthOf(3);
+      expect(actual[0]).to.match(/C/);
+      expect(actual[1]).to.match(/A/);
+      expect(actual[2]).to.match(/B/);
+    });
+  });
+});
diff --git a/src/renderer/users_view/history_edit_form.tsx b/src/renderer/users_view/history_edit_form.tsx
index fa9d118..d29b77d 100644
--- a/src/renderer/users_view/history_edit_form.tsx
+++ b/src/renderer/users_view/history_edit_form.tsx
@@ -17,6 +17,8 @@ import {
 import { Book } from "../../common/persistence/book";
 import { filterBook } from "../../common/persistence/filter_book";
 import { addView, deleteView } from "../../common/persistence/app_data";
+import { View } from "../../common/persistence/view";
+import { FunctionalIterable } from "../../common/persistence/functional_iterable";
 
 /**
  * Convert a book to be presented inside dropdown menu.
@@ -40,6 +42,12 @@ export function HistoryEditForm({
   const [historyInputValue, setHistoryInputValue] = React.useState<
     number | null
   >(null);
+  const views = React.useMemo<Iterable<View>>(() => {
+    const ret = new FunctionalIterable(appData.views.values()).filter(
+      view => view.userId === user.id
+    );
+    return Array.from(ret).reverse();
+  }, [appData.views, user]);
 
   /**
    * Handle history add button click event.
@@ -122,26 +130,29 @@ export function HistoryEditForm({
           />
         </Segment>
         <Segment.Group piled data-testid="history-list" size="small">
-          {Array.from(appData.views.values())
-            .filter(view => view.userId === user.id)
-            .map(view => {
-              const book = appData.books.get(view.bookId);
-              assertWrapper(!!book);
-              return (
-                <Segment secondary clearing key={view.id.toString()}>
-                  <Icon
-                    name="x"
-                    link
-                    color="red"
-                    onClick={(): void => {
-                      const [nextAppData] = deleteView(appData, view.id);
-                      setAppData(nextAppData);
-                    }}
-                  />
-                  {book.title} by {book.author}
-                </Segment>
-              );
-            })}
+          {Array.from(views).map(view => {
+            const book = appData.books.get(view.bookId);
+            assertWrapper(!!book);
+            return (
+              <Segment
+                data-testid="history-list-element"
+                secondary
+                clearing
+                key={view.id.toString()}
+              >
+                <Icon
+                  name="x"
+                  link
+                  color="red"
+                  onClick={(): void => {
+                    const [nextAppData] = deleteView(appData, view.id);
+                    setAppData(nextAppData);
+                  }}
+                />
+                {book.title} by {book.author}
+              </Segment>
+            );
+          })}
         </Segment.Group>
       </Segment.Group>
     </Container>