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Add missing M3 tests for InputDecoration.floatingLabelAlignment (flutter#170903)
## Description This PR adds missing M3 tests for InputDecoration.floatingLabelAlignment. ## Related Issue Will help to complete flutter#168981 ## Tests Adds 8 tests (based on existing M2 tests).
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‎packages/flutter/test/material/input_decorator_test.dart‎

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@@ -7618,6 +7618,220 @@ void main() {
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});
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});
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group('Material3 - InputDecoration floatingLabelAlignment', () {
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Widget buildInputDecoratorWithFloatingLabel({
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required TextDirection textDirection,
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required bool hasIcon,
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required FloatingLabelAlignment alignment,
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bool borderIsOutline = false,
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}) {
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return buildInputDecorator(
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textDirection: textDirection,
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decoration: InputDecoration(
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contentPadding: const EdgeInsetsDirectional.only(start: 40.0, top: 12.0, bottom: 12.0),
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floatingLabelAlignment: alignment,
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icon: hasIcon ? const Icon(Icons.insert_link) : null,
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labelText: labelText,
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hintText: hintText,
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filled: true,
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border: borderIsOutline ? const OutlineInputBorder() : null,
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),
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);
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}
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group('LTR with icon aligned', () {
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testWidgets('start', (WidgetTester tester) async {
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.ltr,
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hasIcon: true,
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alignment: FloatingLabelAlignment.start,
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),
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);
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// icon (40) + contentPadding (40) + _kInputExtraPadding
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expect(getLabelRect(tester).left, 84.0);
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.ltr,
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hasIcon: true,
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alignment: FloatingLabelAlignment.start,
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borderIsOutline: true,
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),
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);
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// icon (40) + contentPadding (40) + _kInputExtraPadding
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expect(getLabelRect(tester).left, 84.0);
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});
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testWidgets('center', (WidgetTester tester) async {
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.ltr,
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hasIcon: true,
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alignment: FloatingLabelAlignment.center,
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),
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);
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// icon (40) + (decorator (800) - icon (40)) / 2
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expect(getLabelCenter(tester).dx, 420.0);
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.ltr,
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hasIcon: true,
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alignment: FloatingLabelAlignment.center,
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borderIsOutline: true,
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),
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);
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// icon (40) + (decorator (800) - icon (40)) / 2
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expect(getLabelCenter(tester).dx, 420.0);
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});
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});
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group('LTR without icon aligned', () {
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testWidgets('start', (WidgetTester tester) async {
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.ltr,
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hasIcon: false,
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alignment: FloatingLabelAlignment.start,
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),
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);
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// contentPadding (40) + _kInputExtraPadding
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expect(getLabelRect(tester).left, 44.0);
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.ltr,
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hasIcon: false,
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alignment: FloatingLabelAlignment.start,
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borderIsOutline: true,
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),
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);
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// contentPadding (40) + _kInputExtraPadding
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expect(getLabelRect(tester).left, 44.0);
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});
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testWidgets('center', (WidgetTester tester) async {
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.ltr,
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hasIcon: false,
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alignment: FloatingLabelAlignment.center,
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),
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);
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// decorator (800) / 2
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expect(getLabelCenter(tester).dx, 400.0);
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.ltr,
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hasIcon: false,
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alignment: FloatingLabelAlignment.center,
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borderIsOutline: true,
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),
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);
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// decorator (800) / 2
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expect(getLabelCenter(tester).dx, 400.0);
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});
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});
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group('RTL with icon aligned', () {
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testWidgets('start', (WidgetTester tester) async {
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.rtl,
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hasIcon: true,
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alignment: FloatingLabelAlignment.start,
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),
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);
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// decorator (800) - icon (40) - contentPadding (40) - _kInputExtraPadding
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expect(getLabelRect(tester).right, 716.0);
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7750+
await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.rtl,
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hasIcon: true,
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alignment: FloatingLabelAlignment.start,
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borderIsOutline: true,
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),
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);
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// decorator (800) - icon (40) - contentPadding (40) - _kInputExtraPadding
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expect(getLabelRect(tester).right, 716.0);
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});
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testWidgets('center', (WidgetTester tester) async {
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.rtl,
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hasIcon: true,
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alignment: FloatingLabelAlignment.center,
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),
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);
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// (decorator (800) - icon (40)) / 2
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expect(getLabelCenter(tester).dx, 380.0);
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.rtl,
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hasIcon: true,
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alignment: FloatingLabelAlignment.center,
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borderIsOutline: true,
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),
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);
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// (decorator (800) - icon (40)) / 2
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expect(getLabelCenter(tester).dx, 380.0);
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});
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});
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group('RTL without icon aligned', () {
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testWidgets('start', (WidgetTester tester) async {
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.rtl,
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hasIcon: false,
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alignment: FloatingLabelAlignment.start,
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),
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);
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// decorator (800) - contentPadding (40) - _kInputExtraPadding
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expect(getLabelRect(tester).right, 756.0);
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.rtl,
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hasIcon: false,
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alignment: FloatingLabelAlignment.start,
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borderIsOutline: true,
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),
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);
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// decorator (800) - contentPadding (40) - _kInputExtraPadding
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expect(getLabelRect(tester).right, 756.0);
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});
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testWidgets('center', (WidgetTester tester) async {
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.rtl,
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hasIcon: false,
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alignment: FloatingLabelAlignment.center,
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),
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);
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// decorator (800) / 2
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expect(getLabelCenter(tester).dx, 400.0);
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await tester.pumpWidget(
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buildInputDecoratorWithFloatingLabel(
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textDirection: TextDirection.rtl,
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hasIcon: false,
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alignment: FloatingLabelAlignment.center,
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borderIsOutline: true,
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),
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);
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// decorator (800) / 2
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expect(getLabelCenter(tester).dx, 400.0);
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});
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});
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});
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group('Material3 - InputDecoration isDense', () {
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// M3 extra horizontal padding.
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const double kInputExtraPadding = 4.0;

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