test(builders): improve coverage (#8274)

packages/builders/__tests__/components/components.test.ts

@@ -0,0 +1,73 @@
+import {
+	APIActionRowComponent,
+	APIButtonComponent,
+	APIMessageActionRowComponent,
+	APISelectMenuComponent,
+	APITextInputComponent,
+	ButtonStyle,
+	ComponentType,
+	TextInputStyle,
+} from 'discord-api-types/v10';
+import { describe, test, expect } from 'vitest';
+import {
+	ActionRowBuilder,
+	ButtonBuilder,
+	createComponentBuilder,
+	SelectMenuBuilder,
+	TextInputBuilder,
+} from '../../src/index';
+
+describe('createComponentBuilder', () => {
+	test.each([ButtonBuilder, SelectMenuBuilder, TextInputBuilder])(
+		'passing an instance of %j should return itself',
+		(Builder) => {
+			const builder = new Builder();
+			expect(createComponentBuilder(builder)).toBe(builder);
+		},
+	);
+
+	test('GIVEN an action row component THEN returns a ActionRowBuilder', () => {
+		const actionRow: APIActionRowComponent<APIMessageActionRowComponent> = {
+			components: [],
+			type: ComponentType.ActionRow,
+		};
+
+		expect(createComponentBuilder(actionRow)).toBeInstanceOf(ActionRowBuilder);
+	});
+
+	test('GIVEN a button component THEN returns a ButtonBuilder', () => {
+		const button: APIButtonComponent = {
+			custom_id: 'abc',
+			style: ButtonStyle.Primary,
+			type: ComponentType.Button,
+		};
+
+		expect(createComponentBuilder(button)).toBeInstanceOf(ButtonBuilder);
+	});
+
+	test('GIVEN a select menu component THEN returns a SelectMenuBuilder', () => {
+		const selectMenu: APISelectMenuComponent = {
+			custom_id: 'abc',
+			options: [],
+			type: ComponentType.SelectMenu,
+		};
+
+		expect(createComponentBuilder(selectMenu)).toBeInstanceOf(SelectMenuBuilder);
+	});
+
+	test('GIVEN a text input component THEN returns a TextInputBuilder', () => {
+		const textInput: APITextInputComponent = {
+			custom_id: 'abc',
+			label: 'abc',
+			style: TextInputStyle.Short,
+			type: ComponentType.TextInput,
+		};
+
+		expect(createComponentBuilder(textInput)).toBeInstanceOf(TextInputBuilder);
+	});
+
+	test('GIVEN an unknown component type THEN throws error', () => {
+		// @ts-expect-error
+		expect(() => createComponentBuilder({ type: 'invalid' })).toThrowError();
+	});
+});