Use decoration hint text as the default value for dropdown button hints (#152474)
## Description This PR makes `DropdownButtonFormField` hint defaults to the provided inputDecoration hintText. Because `DropDownButtonFormField` accepts both a `hint` parameter and a `decoration`parameter, one can expect `InputDecoration.hintText` to be valid. Before this PR, when `InputDecoration.hintText` was specified, it is shown but the vertical position is wrong. After this PR, when `InputDecoration.hintText` is specified, it is used as the default value for `DropDownButtonFormField.hint` and `DropDownButtonFormField.disabledHint`. | Before | After | |--------|--------| |  |  | ## Related Issue Fixes https://github.com/flutter/flutter/issues/111958. ## Tests Adds 5 tests.
This commit is contained in:
Bruno Leroux
GitHub
parent
0c6b600e76
commit
1a8e57f42e
@ -1672,9 +1672,7 @@ class DropdownButtonFormField<T> extends FormField<T> {
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// When adding new arguments, consider adding similar arguments to
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// DropdownButton.
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}) : assert(items == null || items.isEmpty || value == null ||
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items.where((DropdownMenuItem<T> item) {
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return item.value == value;
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}).length == 1,
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items.where((DropdownMenuItem<T> item) => item.value == value).length == 1,
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"There should be exactly one item with [DropdownButton]'s value: "
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'$value. \n'
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'Either zero or 2 or more [DropdownMenuItem]s were detected '
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@ -1693,15 +1691,15 @@ class DropdownButtonFormField<T> extends FormField<T> {
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);
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final bool showSelectedItem = items != null && items.where((DropdownMenuItem<T> item) => item.value == state.value).isNotEmpty;
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bool isHintOrDisabledHintAvailable() {
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final bool isDropdownDisabled = onChanged == null || (items == null || items.isEmpty);
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if (isDropdownDisabled) {
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return hint != null || disabledHint != null;
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} else {
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return hint != null;
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}
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}
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final bool isEmpty = !showSelectedItem && !isHintOrDisabledHintAvailable();
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final bool isDropdownEnabled = onChanged != null && items != null && items.isNotEmpty;
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// If decoration hintText is provided, use it as the default value for both hint and disabledHint.
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final Widget? decorationHint = effectiveDecoration.hintText != null ? Text(effectiveDecoration.hintText!) : null;
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final Widget? effectiveHint = hint ?? decorationHint;
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final Widget? effectiveDisabledHint = disabledHint ?? effectiveHint;
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final bool isHintOrDisabledHintAvailable = isDropdownEnabled
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? effectiveHint != null
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: effectiveHint != null || effectiveDisabledHint != null;
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final bool isEmpty = !showSelectedItem && !isHintOrDisabledHintAvailable;
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final bool hasError = effectiveDecoration.errorText != null;
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// An unfocusable Focus widget so that this widget can detect if its
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@ -1742,8 +1740,8 @@ class DropdownButtonFormField<T> extends FormField<T> {
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items: items,
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selectedItemBuilder: selectedItemBuilder,
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value: state.value,
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hint: hint,
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disabledHint: disabledHint,
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hint: effectiveHint,
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disabledHint: effectiveDisabledHint,
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onChanged: onChanged == null ? null : state.didChange,
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onTap: onTap,
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elevation: elevation,
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@ -1763,7 +1761,11 @@ class DropdownButtonFormField<T> extends FormField<T> {
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enableFeedback: enableFeedback,
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alignment: alignment,
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borderRadius: borderRadius ?? effectiveBorderRadius(),
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inputDecoration: effectiveDecoration.copyWith(errorText: field.errorText),
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// Clear the decoration hintText because DropdownButton has its own hint logic.
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inputDecoration: effectiveDecoration.copyWith(
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errorText: field.errorText,
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hintText: effectiveDecoration.hintText != null ? '' : null,
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),
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isEmpty: isEmpty,
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isFocused: isFocused,
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padding: padding,
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@ -69,6 +69,7 @@ Widget buildDropdown({
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Color? dropdownColor,
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double? menuMaxHeight,
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EdgeInsetsGeometry? padding,
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InputDecoration? decoration,
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}) {
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final List<DropdownMenuItem<String>>? listItems = items?.map<DropdownMenuItem<String>>((String item) {
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return DropdownMenuItem<String>(
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@ -104,6 +105,7 @@ Widget buildDropdown({
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alignment: alignment,
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menuMaxHeight: menuMaxHeight,
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padding: padding,
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decoration: decoration,
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),
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);
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}
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@ -165,6 +167,7 @@ Widget buildFrame({
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EdgeInsetsGeometry? padding,
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Alignment dropdownAlignment = Alignment.center,
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bool? useMaterial3,
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InputDecoration? decoration,
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}) {
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return Theme(
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data: ThemeData(useMaterial3: useMaterial3),
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@ -201,6 +204,7 @@ Widget buildFrame({
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alignment: alignment,
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menuMaxHeight: menuMaxHeight,
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padding: padding,
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decoration: decoration,
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),
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),
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),
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@ -3741,50 +3745,50 @@ void main() {
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alignment: AlignmentDirectional.centerStart,
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isExpanded: false,
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));
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dx, 348.0);
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dy, 292.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dx, 348.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dy, 292.0);
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// AlignmentDirectional.topStart
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.topStart,
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isExpanded: false,
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));
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dx, 348.0);
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dy, 250.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dx, 348.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dy, 250.0);
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// AlignmentDirectional.bottomStart
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.bottomStart,
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isExpanded: false,
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));
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expect(tester.getBottomLeft(find.text(hintText,skipOffstage: false)).dx, 348.0);
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expect(tester.getBottomLeft(find.text(hintText,skipOffstage: false)).dy, 350.0);
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expect(tester.getBottomLeft(find.text(hintText, skipOffstage: false)).dx, 348.0);
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expect(tester.getBottomLeft(find.text(hintText, skipOffstage: false)).dy, 350.0);
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// AlignmentDirectional.center
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.center,
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isExpanded: false,
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));
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expect(tester.getCenter(find.text(hintText,skipOffstage: false)).dx, 388.0);
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expect(tester.getCenter(find.text(hintText,skipOffstage: false)).dy, 300.0);
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expect(tester.getCenter(find.text(hintText, skipOffstage: false)).dx, 388.0);
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expect(tester.getCenter(find.text(hintText, skipOffstage: false)).dy, 300.0);
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// AlignmentDirectional.topEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.topEnd,
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isExpanded: false,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 250.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 250.0);
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// AlignmentDirectional.centerEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.centerEnd,
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isExpanded: false,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 292.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 292.0);
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// AlignmentDirectional.bottomEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.bottomEnd,
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isExpanded: false,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 334.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 334.0);
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// DropdownButton with `isExpanded: true`
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// AlignmentDirectional.centerStart (default)
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@ -3792,50 +3796,50 @@ void main() {
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alignment: AlignmentDirectional.centerStart,
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isExpanded: true,
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));
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dx, 0.0);
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dy, 292.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dx, 0.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dy, 292.0);
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// AlignmentDirectional.topStart
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.topStart,
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isExpanded: true,
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));
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dx, 0.0);
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dy, 250.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dx, 0.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dy, 250.0);
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// AlignmentDirectional.bottomStart
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.bottomStart,
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isExpanded: true,
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));
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expect(tester.getBottomLeft(find.text(hintText,skipOffstage: false)).dx, 0.0);
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expect(tester.getBottomLeft(find.text(hintText,skipOffstage: false)).dy, 350.0);
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expect(tester.getBottomLeft(find.text(hintText, skipOffstage: false)).dx, 0.0);
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expect(tester.getBottomLeft(find.text(hintText, skipOffstage: false)).dy, 350.0);
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// AlignmentDirectional.center
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.center,
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isExpanded: true,
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));
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expect(tester.getCenter(find.text(hintText,skipOffstage: false)).dx, 388.0);
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expect(tester.getCenter(find.text(hintText,skipOffstage: false)).dy, 300.0);
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expect(tester.getCenter(find.text(hintText, skipOffstage: false)).dx, 388.0);
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expect(tester.getCenter(find.text(hintText, skipOffstage: false)).dy, 300.0);
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// AlignmentDirectional.topEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.topEnd,
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isExpanded: true,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 776.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 250.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 776.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 250.0);
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// AlignmentDirectional.centerEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.centerEnd,
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isExpanded: true,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 776.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 292.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 776.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 292.0);
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// AlignmentDirectional.bottomEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.bottomEnd,
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isExpanded: true,
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));
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expect(tester.getBottomRight(find.text(hintText,skipOffstage: false)).dx, 776.0);
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expect(tester.getBottomRight(find.text(hintText,skipOffstage: false)).dy, 350.0);
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expect(tester.getBottomRight(find.text(hintText, skipOffstage: false)).dx, 776.0);
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expect(tester.getBottomRight(find.text(hintText, skipOffstage: false)).dy, 350.0);
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});
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testWidgets('DropdownButton hint alignment with selectedItemBuilder', (WidgetTester tester) async {
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@ -3847,56 +3851,56 @@ void main() {
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isExpanded: false,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dx, 348.0);
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dy, 292.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dx, 348.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dy, 292.0);
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// AlignmentDirectional.topStart
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.topStart,
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isExpanded: false,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dx, 348.0);
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dy, 250.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dx, 348.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dy, 250.0);
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// AlignmentDirectional.bottomStart
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.bottomStart,
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isExpanded: false,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getBottomLeft(find.text(hintText,skipOffstage: false)).dx, 348.0);
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expect(tester.getBottomLeft(find.text(hintText,skipOffstage: false)).dy, 350.0);
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expect(tester.getBottomLeft(find.text(hintText, skipOffstage: false)).dx, 348.0);
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expect(tester.getBottomLeft(find.text(hintText, skipOffstage: false)).dy, 350.0);
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// AlignmentDirectional.center
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.center,
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isExpanded: false,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getCenter(find.text(hintText,skipOffstage: false)).dx, 388.0);
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expect(tester.getCenter(find.text(hintText,skipOffstage: false)).dy, 300.0);
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expect(tester.getCenter(find.text(hintText, skipOffstage: false)).dx, 388.0);
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expect(tester.getCenter(find.text(hintText, skipOffstage: false)).dy, 300.0);
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// AlignmentDirectional.topEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.topEnd,
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isExpanded: false,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 250.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 250.0);
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// AlignmentDirectional.centerEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.centerEnd,
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isExpanded: false,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 292.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 292.0);
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// AlignmentDirectional.bottomEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.bottomEnd,
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isExpanded: false,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 334.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 428.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 334.0);
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// DropdownButton with `isExpanded: true`
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// AlignmentDirectional.centerStart (default)
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@ -3905,56 +3909,118 @@ void main() {
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isExpanded: true,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dx, 0.0);
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dy, 292.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dx, 0.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dy, 292.0);
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// AlignmentDirectional.topStart
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.topStart,
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isExpanded: true,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dx, 0.0);
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expect(tester.getTopLeft(find.text(hintText,skipOffstage: false)).dy, 250.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dx, 0.0);
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expect(tester.getTopLeft(find.text(hintText, skipOffstage: false)).dy, 250.0);
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// AlignmentDirectional.bottomStart
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.bottomStart,
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isExpanded: true,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getBottomLeft(find.text(hintText,skipOffstage: false)).dx, 0.0);
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expect(tester.getBottomLeft(find.text(hintText,skipOffstage: false)).dy, 350.0);
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expect(tester.getBottomLeft(find.text(hintText, skipOffstage: false)).dx, 0.0);
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expect(tester.getBottomLeft(find.text(hintText, skipOffstage: false)).dy, 350.0);
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// AlignmentDirectional.center
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.center,
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isExpanded: true,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getCenter(find.text(hintText,skipOffstage: false)).dx, 388.0);
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expect(tester.getCenter(find.text(hintText,skipOffstage: false)).dy, 300.0);
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expect(tester.getCenter(find.text(hintText, skipOffstage: false)).dx, 388.0);
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expect(tester.getCenter(find.text(hintText, skipOffstage: false)).dy, 300.0);
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// AlignmentDirectional.topEnd
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await tester.pumpWidget(buildDropdownWithHint(
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alignment: AlignmentDirectional.topEnd,
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isExpanded: true,
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enableSelectedItemBuilder: true,
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));
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 776.0);
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expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 250.0);
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expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 776.0);
|
||||
expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 250.0);
|
||||
// AlignmentDirectional.centerEnd
|
||||
await tester.pumpWidget(buildDropdownWithHint(
|
||||
alignment: AlignmentDirectional.centerEnd,
|
||||
isExpanded: true,
|
||||
enableSelectedItemBuilder: true,
|
||||
));
|
||||
expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dx, 776.0);
|
||||
expect(tester.getTopRight(find.text(hintText,skipOffstage: false)).dy, 292.0);
|
||||
expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dx, 776.0);
|
||||
expect(tester.getTopRight(find.text(hintText, skipOffstage: false)).dy, 292.0);
|
||||
// AlignmentDirectional.bottomEnd
|
||||
await tester.pumpWidget(buildDropdownWithHint(
|
||||
alignment: AlignmentDirectional.bottomEnd,
|
||||
isExpanded: true,
|
||||
enableSelectedItemBuilder: true,
|
||||
));
|
||||
expect(tester.getBottomRight(find.text(hintText,skipOffstage: false)).dx, 776.0);
|
||||
expect(tester.getBottomRight(find.text(hintText,skipOffstage: false)).dy, 350.0);
|
||||
expect(tester.getBottomRight(find.text(hintText, skipOffstage: false)).dx, 776.0);
|
||||
expect(tester.getBottomRight(find.text(hintText, skipOffstage: false)).dy, 350.0);
|
||||
});
|
||||
|
||||
group('DropdownButtonFormField decoration hintText', () {
|
||||
const String decorationHintText = 'Decoration Hint text';
|
||||
const String hintText = 'Hint text';
|
||||
const String disabledHintText = 'Disabled Hint text';
|
||||
|
||||
testWidgets('is the fallback value for DropdownButtonFormField.hint', (WidgetTester tester) async {
|
||||
await tester.pumpWidget(buildFrame(
|
||||
isFormField: true,
|
||||
onChanged: (String? newValue) {},
|
||||
decoration: const InputDecoration(hintText: decorationHintText),
|
||||
));
|
||||
|
||||
expect(find.text(decorationHintText, skipOffstage: false), findsOne);
|
||||
});
|
||||
|
||||
testWidgets('does not override DropdownButtonFormField.hint', (WidgetTester tester) async {
|
||||
await tester.pumpWidget(buildFrame(
|
||||
hint: const Text(hintText),
|
||||
isFormField: true,
|
||||
onChanged: (String? newValue) {},
|
||||
decoration: const InputDecoration(hintText: decorationHintText),
|
||||
));
|
||||
|
||||
expect(find.text(hintText, skipOffstage: false), findsOne);
|
||||
expect(find.text(decorationHintText, skipOffstage: false), findsNothing);
|
||||
});
|
||||
|
||||
testWidgets('is the fallback value for DropdownButtonFormField.disabledHint', (WidgetTester tester) async {
|
||||
// The Dropdown is disabled because onChanged is not defined.
|
||||
await tester.pumpWidget(buildFrame(
|
||||
isFormField: true,
|
||||
decoration: const InputDecoration(hintText: decorationHintText),
|
||||
));
|
||||
|
||||
expect(find.text(decorationHintText, skipOffstage: false), findsOne);
|
||||
});
|
||||
|
||||
testWidgets('does not override DropdownButtonFormField.disabledHint', (WidgetTester tester) async {
|
||||
// The Dropdown is disabled because onChanged is not defined.
|
||||
await tester.pumpWidget(buildFrame(
|
||||
disabledHint: const Text(disabledHintText),
|
||||
isFormField: true,
|
||||
decoration: const InputDecoration(hintText: decorationHintText),
|
||||
));
|
||||
|
||||
expect(find.text(disabledHintText, skipOffstage: false), findsOne);
|
||||
expect(find.text(decorationHintText, skipOffstage: false), findsNothing);
|
||||
});
|
||||
|
||||
testWidgets('is not used for disabledHint if DropdownButtonFormField.hint is provided', (WidgetTester tester) async {
|
||||
// The Dropdown is disabled because onChanged is not defined.
|
||||
await tester.pumpWidget(buildFrame(
|
||||
hint: const Text(hintText),
|
||||
isFormField: true,
|
||||
decoration: const InputDecoration(hintText: decorationHintText),
|
||||
));
|
||||
|
||||
expect(find.text(hintText, skipOffstage: false), findsOne);
|
||||
expect(find.text(decorationHintText, skipOffstage: false), findsNothing);
|
||||
});
|
||||
});
|
||||
|
||||
testWidgets('BorderRadius property clips dropdown button and dropdown menu', (WidgetTester tester) async {
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user