update num and widget extensions tests

+import 'package:flutter_test/flutter_test.dart';
+import 'package:get/utils.dart';
+
+void main() {
+  num x = 5;
+  num y = 7;
+  test('Test for var.isLowerThan(value)', () {
+    expect(x.isLowerThan(y), true);
+    expect(y.isLowerThan(x), false);
+  });
+  test('Test for var.isGreaterThan(value)', () {
+    expect(x.isGreaterThan(y), false);
+    expect(y.isGreaterThan(x), true);
+  });
+  test('Test for var.isGreaterThan(value)', () {
+    expect(x.isEqual(y), false);
+    expect(y.isEqual(x), false);
+    expect(x.isEqual(5), true);
+    expect(y.isEqual(7), true);
+  });
+}

+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:get/utils.dart';
+
+void main() {
+  group('Group test for PaddingX Extension', () {
+    testWidgets('Test of paddingAll', (WidgetTester tester) async {
+      Widget containerTest;
+
+      expect(find.byType(Padding), findsNothing);
+
+      await tester.pumpWidget(containerTest.paddingAll(16));
+
+      expect(find.byType(Padding), findsOneWidget);
+    });
+
+    testWidgets('Test of paddingOnly', (WidgetTester tester) async {
+      Widget containerTest;
+
+      expect(find.byType(Padding), findsNothing);
+
+      await tester.pumpWidget(containerTest.paddingOnly(top: 16));
+
+      expect(find.byType(Padding), findsOneWidget);
+    });
+
+    testWidgets('Test of paddingSymmetric', (WidgetTester tester) async {
+      Widget containerTest;
+
+      expect(find.byType(Padding), findsNothing);
+
+      await tester.pumpWidget(containerTest.paddingSymmetric(vertical: 16));
+
+      expect(find.byType(Padding), findsOneWidget);
+    });
+
+    testWidgets('Test of paddingZero', (WidgetTester tester) async {
+      Widget containerTest;
+
+      expect(find.byType(Padding), findsNothing);
+
+      await tester.pumpWidget(containerTest.paddingZero);
+
+      expect(find.byType(Padding), findsOneWidget);
+    });
+  });
+
+  group('Group test for MarginX Extension', () {
+    testWidgets('Test of marginAll', (WidgetTester tester) async {
+      Widget containerTest;
+
+      await tester.pumpWidget(containerTest.marginAll(16));
+
+      expect(find.byType(Container), findsOneWidget);
+    });
+
+    testWidgets('Test of marginOnly', (WidgetTester tester) async {
+      Widget containerTest;
+
+      await tester.pumpWidget(containerTest.marginOnly(top: 16));
+
+      expect(find.byType(Container), findsOneWidget);
+    });
+
+    testWidgets('Test of marginSymmetric', (WidgetTester tester) async {
+      Widget containerTest;
+
+      await tester.pumpWidget(containerTest.marginSymmetric(vertical: 16));
+
+      expect(find.byType(Container), findsOneWidget);
+    });
+
+    testWidgets('Test of marginZero', (WidgetTester tester) async {
+      Widget containerTest;
+
+      await tester.pumpWidget(containerTest.marginZero);
+
+      expect(find.byType(Container), findsOneWidget);
+    });
+  });
+}