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ajayi-josephajayi-joseph
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Refactor: Break down massive test file into focused test files (#32)
## TLDR; Refactored 1914-line use_state_js_test.dart into 17 focused test files. Removed duplicate semantic_elements_test.dart. All 271 tests preserved. ## What Does This Do? Breaks the monolithic test file into organized subdirectories following the "no groups" philosophy: test/ ├── hooks/ # 12 hook test files ├── components/ # 4 component utility files ├── events/ # Event handling ├── elements/ # HTML elements └── jsx/ # JSX DSL ## Brief Details? Removed: - test/use_state_js_test.dart (1914 lines) - test/semantic_elements_test.dart (duplicate) Created 17 new files covering: useState, useEffect, useReducer, useContext, useRef, useMemo, useCallback, forwardRef, memo, Children utilities, Fragment, StrictMode, event handling, HTML elements, conditional/list rendering, component composition, and JSX DSL. ## How Do The Tests Prove The Change Works? - Before: 271 tests in 1 massive file - After: 271 tests across 17 focused files - Zero test loss - complete coverage preservation - Addresses TODO: // TODO: Break each group into separate files. No groups!
1 parent 6d17895 commit 625eda7

21 files changed

Lines changed: 1951 additions & 3826 deletions

‎packages/dart_node_react/test/components/component_utilities_test.dart‎

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/// Tests for component utilities (forwardRef, memo, Children).
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@TestOn('js')
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library;
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import 'dart:js_interop';
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import 'package:dart_node_react/dart_node_react.dart' hide RenderResult, render;
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import 'package:dart_node_react/src/testing_library.dart';
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import 'package:test/test.dart';
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void main() {
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group('forwardRef2', () {
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test('forwards ref to child component', () {
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final fancyInput = forwardRef2(
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(props, ref) => input(
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type: 'text',
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placeholder: props['placeholder'] as String? ?? '',
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props: {'ref': ref, 'data-testid': 'fancy-input'},
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),
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);
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final result = render(
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createElement(fancyInput, createProps({'placeholder': 'Enter text'})),
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);
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final inputEl = result.getByTestId('fancy-input');
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expect(inputEl.getAttribute('placeholder'), equals('Enter text'));
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result.unmount();
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});
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});
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group('memo2', () {
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test('prevents unnecessary re-renders', () {
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var childRenderCount = 0;
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final child = registerFunctionComponent((props) {
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childRenderCount++;
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return pEl('Name: ${props['name']}', props: {'data-testid': 'child'});
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});
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final memoizedChild = memo2(child);
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final parent = registerFunctionComponent((props) {
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final count = useState(0);
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return div(
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children: [
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pEl('Parent count: ${count.value}'),
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createElement(memoizedChild, createProps({'name': 'Alice'})),
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button(
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text: 'Inc Parent',
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props: {'data-testid': 'inc'},
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onClick: () => count.set(count.value + 1),
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),
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],
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);
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});
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childRenderCount = 0;
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final result = render(fc(parent));
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final initialRenders = childRenderCount;
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fireClick(result.getByTestId('inc'));
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expect(childRenderCount, equals(initialRenders));
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result.unmount();
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});
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test('re-renders when props change with custom comparison', () {
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var renderCount = 0;
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final child = registerFunctionComponent((props) {
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renderCount++;
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return pEl(
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'ID: ${props['id']}, Name: ${props['name']}',
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props: {'data-testid': 'child'},
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);
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});
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final memoizedChild = memo2(
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child,
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arePropsEqual: (prev, next) => prev['id'] == next['id'],
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);
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final parent = registerFunctionComponent((props) {
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final id = useState(1);
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final name = useState('Alice');
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return div(
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children: [
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createElement(
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memoizedChild,
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createProps({'id': id.value, 'name': name.value}),
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),
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button(
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text: 'Change Name',
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props: {'data-testid': 'change-name'},
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onClick: () => name.set('Bob'),
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),
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button(
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text: 'Change ID',
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props: {'data-testid': 'change-id'},
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onClick: () => id.set(id.value + 1),
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),
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],
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);
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});
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renderCount = 0;
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final result = render(fc(parent));
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final initial = renderCount;
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fireClick(result.getByTestId('change-name'));
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expect(renderCount, equals(initial));
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fireClick(result.getByTestId('change-id'));
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expect(renderCount, greaterThan(initial));
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result.unmount();
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});
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});
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group('Children utilities', () {
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test('Children.count works with null children', () {
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final wrapper = registerFunctionComponent((props) {
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final children = props['children'] as JSAny?;
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final count = Children.count(children);
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return pEl('Count: $count', props: {'data-testid': 'count'});
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});
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// Pass no children - count should be 0
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final result = render(fc(wrapper));
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expect(result.getByTestId('count').textContent, equals('Count: 0'));
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result.unmount();
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});
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test('Children utilities are available for import', () {
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// Simple test to verify Children utilities compile and are accessible
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// The count function exists and works with null
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final count = Children.count(null);
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expect(count, equals(0));
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// toArray with null returns empty list
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final arr = Children.toArray(null);
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expect(arr, isEmpty);
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});
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});
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}

‎packages/dart_node_react/test/components/composition_test.dart‎

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/// Tests for component composition functionality.
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@TestOn('js')
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library;
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import 'package:dart_node_react/dart_node_react.dart' hide RenderResult, render;
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import 'package:dart_node_react/src/testing_library.dart';
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import 'package:test/test.dart';
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void main() {
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test('parent passes props to child', () {
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final child = registerFunctionComponent(
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(props) =>
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pEl('Hello, ${props['name']}!', props: {'data-testid': 'greeting'}),
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);
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final parent = registerFunctionComponent(
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(props) => div(
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children: [
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fc(child, {'name': 'World'}),
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],
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),
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);
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final result = render(fc(parent));
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expect(result.getByTestId('greeting').textContent, equals('Hello, World!'));
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result.unmount();
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});
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test('child calls parent callback', () {
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var parentNotified = false;
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final child = registerFunctionComponent((props) {
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final onNotify = props['onNotify'] as void Function()?;
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return button(
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text: 'Notify',
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onClick: onNotify,
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props: {'data-testid': 'notify'},
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);
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});
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final parent = registerFunctionComponent(
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(props) => fc(child, {'onNotify': () => parentNotified = true}),
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);
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final result = render(fc(parent));
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expect(parentNotified, isFalse);
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fireClick(result.getByTestId('notify'));
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expect(parentNotified, isTrue);
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result.unmount();
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});
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test('deeply nested components work correctly', () {
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final grandChild = registerFunctionComponent(
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(props) => span('GrandChild', props: {'data-testid': 'grandchild'}),
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);
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final child = registerFunctionComponent(
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(props) => div(children: [fc(grandChild)]),
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);
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final parent = registerFunctionComponent(
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(props) => div(children: [fc(child)]),
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);
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final result = render(fc(parent));
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expect(result.getByTestId('grandchild').textContent, equals('GrandChild'));
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result.unmount();
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});
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}

‎packages/dart_node_react/test/components/rendering_test.dart‎

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/// Tests for conditional and list rendering functionality.
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@TestOn('js')
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library;
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import 'package:dart_node_react/dart_node_react.dart' hide RenderResult, render;
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import 'package:dart_node_react/src/testing_library.dart';
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import 'package:test/test.dart';
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void main() {
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group('Conditional rendering', () {
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test('shows/hides content based on state', () {
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final toggle = registerFunctionComponent((props) {
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final visible = useState(false);
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return div(
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children: [
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button(
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text: visible.value ? 'Hide' : 'Show',
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onClick: () => visible.set(!visible.value),
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props: {'data-testid': 'toggle'},
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),
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if (visible.value)
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pEl('Content', props: {'data-testid': 'content'})
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else
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span(''),
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],
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);
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});
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final result = render(fc(toggle));
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expect(result.queryByTestId('content'), isNull);
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fireClick(result.getByTestId('toggle'));
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expect(result.queryByTestId('content'), isNotNull);
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expect(result.getByTestId('content').textContent, equals('Content'));
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fireClick(result.getByTestId('toggle'));
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expect(result.queryByTestId('content'), isNull);
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result.unmount();
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});
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test('switches between components', () {
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final switcher = registerFunctionComponent((props) {
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final showA = useState(true);
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return div(
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children: [
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button(
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text: 'Switch',
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onClick: () => showA.set(!showA.value),
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props: {'data-testid': 'switch'},
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),
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if (showA.value)
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pEl('Component A', props: {'data-testid': 'a'})
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else
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pEl('Component B', props: {'data-testid': 'b'}),
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],
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);
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});
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final result = render(fc(switcher));
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expect(result.queryByTestId('a'), isNotNull);
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expect(result.queryByTestId('b'), isNull);
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fireClick(result.getByTestId('switch'));
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expect(result.queryByTestId('a'), isNull);
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expect(result.queryByTestId('b'), isNotNull);
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result.unmount();
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});
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});
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group('List rendering', () {
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test('renders static list of items', () {
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// Static list that doesn't rely on state
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final itemList = registerFunctionComponent((props) {
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// Use static data passed via props
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final itemsStr = props['items'] as String? ?? 'Apple,Banana,Cherry';
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final items = itemsStr.split(',');
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return ul(
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props: {'data-testid': 'list'},
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children: items
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.map((item) => li(item, props: {'key': item}))
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.toList(),
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);
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});
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final result = render(fc(itemList, {'items': 'Apple,Banana,Cherry'}));
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final list = result.getByTestId('list');
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expect(list.innerHTML, contains('Apple'));
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expect(list.innerHTML, contains('Banana'));
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expect(list.innerHTML, contains('Cherry'));
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result.unmount();
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});
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test('adds and removes items via string state', () {
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// Use comma-separated string for list state to work with JS interop
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final dynamicList = registerFunctionComponent((props) {
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final itemsStr = useState('One');
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final items = itemsStr.value.split(',').where((s) => s.isNotEmpty);
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return div(
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children: [
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ul(
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props: {'data-testid': 'list'},
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children: items.map(li).toList(),
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),
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button(
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text: 'Add',
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onClick: () => itemsStr.set('${itemsStr.value},New'),
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props: {'data-testid': 'add'},
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),
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button(
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text: 'Remove',
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onClick: () {
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final parts = itemsStr.value.split(',');
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final newValue = parts.length > 1
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? parts.sublist(0, parts.length - 1).join(',')
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: '';
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itemsStr.set(newValue);
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},
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props: {'data-testid': 'remove'},
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),
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],
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);
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});
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final result = render(fc(dynamicList));
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expect(result.getByTestId('list').innerHTML, contains('One'));
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fireClick(result.getByTestId('add'));
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expect(result.getByTestId('list').innerHTML, contains('New'));
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fireClick(result.getByTestId('remove'));
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expect(result.getByTestId('list').innerHTML, isNot(contains('New')));
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result.unmount();
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});
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});
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}

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