WIP: EFfects List Button Event tests

tests/buttonEvents/Effects/List.test.ts

@@ -1,3 +1,50 @@
-test.todo("GIVEN pageOption is NOT a number, EXPECT error");
+import { ActionRowBuilder, ButtonBuilder, ButtonInteraction, EmbedBuilder } from "discord.js";
+import List from "../../../src/buttonEvents/Effects/List";
+import EffectHelper from "../../../src/helpers/EffectHelper";
+import { mock } from "jest-mock-extended";
 
-test.todo("GIVEN pageOption is a number, EXPECT interaction updated");
+jest.mock("../../../src/helpers/EffectHelper");
+
+let interaction: ReturnType<typeof mock<ButtonInteraction>>;
+
+beforeEach(() => {
+    jest.resetAllMocks();
+
+    (EffectHelper.GenerateEffectEmbed as jest.Mock).mockResolvedValue({
+        embed: mock<EmbedBuilder>(),
+        row: mock<ActionRowBuilder<ButtonBuilder>>(),
+    });
+
+    interaction = mock<ButtonInteraction>();
+    interaction.user.id = "userId";
+    interaction.customId = "effects list 1";
+});
+
+test("GIVEN pageOption is NOT a number, EXPECT error", async () => {
+    // Arrange
+    interaction.customId = "effects list invalid";
+
+    // Act
+    await List(interaction);
+
+    // Assert
+    expect(interaction.reply).toHaveBeenCalledTimes(1);
+    expect(interaction.reply).toHaveBeenCalledWith("Page option is not a valid number")
+
+    expect(EffectHelper.GenerateEffectEmbed).not.toHaveBeenCalled();
+    expect(interaction.update).not.toHaveBeenCalled();
+});
+
+test("GIVEN pageOption is a number, EXPECT interaction updated", async () => {
+    // Arrange
+    interaction.customId = "effects list 1";
+
+    // Act
+    await List(interaction);
+
+    // Assert
+    expect(EffectHelper.GenerateEffectEmbed).toHaveBeenCalledTimes(1);
+    expect(EffectHelper.GenerateEffectEmbed).toHaveBeenCalledWith("userId", 1);
+
+    expect(interaction.update).toHaveBeenCalledTimes(1);
+});