Closed
Description
Originally reported @ b/243693776
When writing a semantic test (that is expected to fail), I see an unhelpful error. Previously, the error showed the diff of the expected properties and the actual ones, but I believe an exception is being thrown while calculating this diff.
Steps to Reproduce
- Create a test using
matchesSemanticsorcontainsSemanticsthat is expected to fail - Run the test
Expected results: Test fails with error messaging that compares expected and actual output with no errors
Actual results: Test fails with error messaging containing errors
Code sample
expect(
tester.getSemantics(find.bySemanticsLabel('title')),
matchesSemantics(
hasTapAction: true,
hasEnabledState: true,
isEnabled: true,
hasToggledState: true,
isToggled: true,
isFocusable: true,
isSelected: true,
),
);Logs
The following TestFailure was thrown running a test:
Expected: has semantics with actions:
[SemanticsAction:SemanticsAction.tap] without actions: [
SemanticsAction:SemanticsAction.longPress,
SemanticsAction:SemanticsAction.scrollLeft,
SemanticsAction:SemanticsAction.scrollRight,
SemanticsAction:SemanticsAction.scrollUp,
SemanticsAction:SemanticsAction.scrollDown,
SemanticsAction:SemanticsAction.increase,
SemanticsAction:SemanticsAction.decrease,
SemanticsAction:SemanticsAction.showOnScreen,
SemanticsAction:SemanticsAction.moveCursorForwardByCharacter,
SemanticsAction:SemanticsAction.moveCursorBackwardByCharacter,
SemanticsAction:SemanticsAction.setSelection,
SemanticsAction:SemanticsAction.copy,
SemanticsAction:SemanticsAction.cut,
SemanticsAction:SemanticsAction.paste,
SemanticsAction:SemanticsAction.didGainAccessibilityFocus,
SemanticsAction:SemanticsAction.didLoseAccessibilityFocus,
SemanticsAction:SemanticsAction.dismiss,
SemanticsAction:SemanticsAction.moveCursorForwardByWord,
SemanticsAction:SemanticsAction.moveCursorBackwardByWord,
SemanticsAction:SemanticsAction.setText
] with flags: [
SemanticsFlag:SemanticsFlag.isButton,
SemanticsFlag:SemanticsFlag.isFocusable,
SemanticsFlag:SemanticsFlag.hasEnabledState,
SemanticsFlag:SemanticsFlag.isEnabled,
SemanticsFlag:SemanticsFlag.isInMutuallyExclusiveGroup
] without flags: [
SemanticsFlag:SemanticsFlag.hasCheckedState,
SemanticsFlag:SemanticsFlag.isChecked,
SemanticsFlag:SemanticsFlag.isSelected,
SemanticsFlag:SemanticsFlag.isSlider,
SemanticsFlag:SemanticsFlag.isKeyboardKey,
SemanticsFlag:SemanticsFlag.isLink,
SemanticsFlag:SemanticsFlag.isTextField,
SemanticsFlag:SemanticsFlag.isReadOnly,
SemanticsFlag:SemanticsFlag.isFocused,
SemanticsFlag:SemanticsFlag.isHeader,
SemanticsFlag:SemanticsFlag.isObscured,
SemanticsFlag:SemanticsFlag.isMultiline,
SemanticsFlag:SemanticsFlag.namesRoute,
SemanticsFlag:SemanticsFlag.scopesRoute,
SemanticsFlag:SemanticsFlag.isHidden,
SemanticsFlag:SemanticsFlag.isImage,
SemanticsFlag:SemanticsFlag.isLiveRegion,
SemanticsFlag:SemanticsFlag.hasToggledState,
SemanticsFlag:SemanticsFlag.isToggled,
SemanticsFlag:SemanticsFlag.hasImplicitScrolling
]
Actual: SemanticsNode:<SemanticsNode#10(Rect.fromLTRB(0.0, 0.0,
103.0, 64.0), actions: [tap], flags: [isButton, hasEnabledState,
isEnabled, isFocusable], label: "title", textDirection:
ltr)>
Which: null
'package:flutter/src/foundation/diagnostics.dart': Failed
assertion: line 3057 pos 5: 'indexOfDot != -1 && indexOfDot <
description.length - 1': The provided object "8" is not an enum.
at #0 _AssertionError._doThrowNew
(dart:core-patch/errors_patch.dart:51:61)
#1 _AssertionError._throwNew
(dart:core-patch/errors_patch.dart:40:5)
#2 describeEnum
(package:flutter/src/foundation/diagnostics.dart:3057:5)
#3 _MatchesSemanticsData.matches
(package:flutter_test/src/matchers.dart:2483:45)
#4 _expect (package:test_api/src/expect/expect.dart:123:30)
#5 expect (package:test_api/src/expect/expect.dart:46:3)
#6 expect
(package:flutter_test/src/widget_tester.dart:460:16)
#7 main.<anonymous closure>.<anonymous closure>
...