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abdullh.alsoleman
Front-End
Commits
41b50c22
Unverified
Commit
41b50c22
authored
Aug 28, 2022
by
Casey Hillers
Committed by
GitHub
Aug 28, 2022
Browse files
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Plain Diff
Revert "Update accessibility contrast test coverage (#109784)" (#110436)
This reverts commit
f477c8b1
.
parent
041c3af5
Changes
2
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2 changed files
with
51 additions
and
123 deletions
+51
-123
accessibility.dart
packages/flutter_test/lib/src/accessibility.dart
+51
-68
accessibility_test.dart
packages/flutter_test/test/accessibility_test.dart
+0
-55
No files found.
packages/flutter_test/lib/src/accessibility.dart
View file @
41b50c22
...
@@ -331,79 +331,61 @@ class MinimumTextContrastGuideline extends AccessibilityGuideline {
...
@@ -331,79 +331,61 @@ class MinimumTextContrastGuideline extends AccessibilityGuideline {
if
(
shouldSkipNode
(
data
))
{
if
(
shouldSkipNode
(
data
))
{
return
result
;
return
result
;
}
}
final
String
text
=
data
.
label
.
isEmpty
?
data
.
value
:
data
.
label
;
final
Iterable
<
Element
>
elements
=
find
.
text
(
text
).
hitTestable
().
evaluate
();
for
(
final
Element
element
in
elements
)
{
result
+=
await
_evaluateElement
(
node
,
element
,
tester
,
image
,
byteData
);
}
return
result
;
}
Future
<
Evaluation
>
_evaluateElement
(
SemanticsNode
node
,
Element
element
,
WidgetTester
tester
,
ui
.
Image
image
,
ByteData
byteData
,
)
async
{
// Look up inherited text properties to determine text size and weight.
// Look up inherited text properties to determine text size and weight.
late
bool
isBold
;
late
bool
isBold
;
double
?
fontSize
;
double
?
fontSize
;
final
String
text
=
data
.
label
.
isEmpty
?
data
.
value
:
data
.
label
;
final
List
<
Element
>
elements
=
find
.
text
(
text
).
hitTestable
().
evaluate
().
toList
();
late
final
Rect
paintBounds
;
late
final
Rect
paintBounds
;
late
final
Rect
paintBoundsWithOffset
;
final
RenderObject
?
renderBox
=
element
.
renderObject
;
if
(
renderBox
is
!
RenderBox
)
{
throw
StateError
(
'Unexpected renderObject type:
$renderBox
'
);
}
const
Offset
offset
=
Offset
(
4.0
,
4.0
);
paintBoundsWithOffset
=
Rect
.
fromPoints
(
renderBox
.
localToGlobal
(
renderBox
.
paintBounds
.
topLeft
-
offset
),
renderBox
.
localToGlobal
(
renderBox
.
paintBounds
.
bottomRight
+
offset
),
);
paintBounds
=
Rect
.
fromPoints
(
if
(
elements
.
length
==
1
)
{
renderBox
.
localToGlobal
(
renderBox
.
paintBounds
.
topLeft
),
final
Element
element
=
elements
.
single
;
renderBox
.
localToGlobal
(
renderBox
.
paintBounds
.
bottomRight
),
final
RenderObject
?
renderBox
=
element
.
renderObject
;
);
if
(
renderBox
is
!
RenderBox
)
{
throw
StateError
(
'Unexpected renderObject type:
$renderBox
'
);
final
Offset
?
nodeOffset
=
node
.
transform
!=
null
?
MatrixUtils
.
getAsTranslation
(
node
.
transform
!)
:
null
;
}
final
Rect
nodeBounds
=
node
.
rect
.
shift
(
nodeOffset
??
Offset
.
zero
);
final
Rect
intersection
=
nodeBounds
.
intersect
(
paintBounds
);
if
(
intersection
.
width
<=
0
||
intersection
.
height
<=
0
)
{
// Skip this element since it doesn't correspond to the given semantic
// node.
return
const
Evaluation
.
pass
();
}
final
Widget
widget
=
element
.
widget
;
const
Offset
offset
=
Offset
(
4.0
,
4.0
);
final
DefaultTextStyle
defaultTextStyle
=
DefaultTextStyle
.
of
(
element
);
paintBounds
=
Rect
.
fromPoints
(
if
(
widget
is
Text
)
{
renderBox
.
localToGlobal
(
renderBox
.
paintBounds
.
topLeft
-
offset
),
final
TextStyle
?
style
=
widget
.
style
;
renderBox
.
localToGlobal
(
renderBox
.
paintBounds
.
bottomRight
+
offset
),
final
TextStyle
effectiveTextStyle
=
style
==
null
||
style
.
inherit
);
?
defaultTextStyle
.
style
.
merge
(
widget
.
style
)
final
Widget
widget
=
element
.
widget
;
:
style
;
final
DefaultTextStyle
defaultTextStyle
=
DefaultTextStyle
.
of
(
element
);
isBold
=
effectiveTextStyle
.
fontWeight
==
FontWeight
.
bold
;
if
(
widget
is
Text
)
{
fontSize
=
effectiveTextStyle
.
fontSize
;
final
TextStyle
?
style
=
widget
.
style
;
}
else
if
(
widget
is
EditableText
)
{
final
TextStyle
effectiveTextStyle
=
style
==
null
||
style
.
inherit
isBold
=
widget
.
style
.
fontWeight
==
FontWeight
.
bold
;
?
defaultTextStyle
.
style
.
merge
(
widget
.
style
)
fontSize
=
widget
.
style
.
fontSize
;
:
style
;
isBold
=
effectiveTextStyle
.
fontWeight
==
FontWeight
.
bold
;
fontSize
=
effectiveTextStyle
.
fontSize
;
}
else
if
(
widget
is
EditableText
)
{
isBold
=
widget
.
style
.
fontWeight
==
FontWeight
.
bold
;
fontSize
=
widget
.
style
.
fontSize
;
}
else
{
throw
StateError
(
'Unexpected widget type:
${widget.runtimeType}
'
);
}
}
else
if
(
elements
.
length
>
1
)
{
return
Evaluation
.
fail
(
'Multiple nodes with the same label:
${data.label}
\n
'
,
);
}
else
{
}
else
{
throw
StateError
(
'Unexpected widget type:
${widget.runtimeType}
'
);
// If we can't find the text node then assume the label does not
// correspond to actual text.
return
result
;
}
}
if
(
isNodeOffScreen
(
paintBounds
WithOffset
,
tester
.
binding
.
window
))
{
if
(
isNodeOffScreen
(
paintBounds
,
tester
.
binding
.
window
))
{
return
const
Evaluation
.
pass
()
;
return
result
;
}
}
final
Map
<
Color
,
int
>
colorHistogram
=
_colorsWithinRect
(
byteData
,
paintBounds
WithOffset
,
image
.
width
,
image
.
height
);
final
Map
<
Color
,
int
>
colorHistogram
=
_colorsWithinRect
(
byteData
,
paintBounds
,
image
.
width
,
image
.
height
);
// Node was too far off screen.
// Node was too far off screen.
if
(
colorHistogram
.
isEmpty
)
{
if
(
colorHistogram
.
isEmpty
)
{
return
const
Evaluation
.
pass
()
;
return
result
;
}
}
final
_ContrastReport
report
=
_ContrastReport
(
colorHistogram
);
final
_ContrastReport
report
=
_ContrastReport
(
colorHistogram
);
...
@@ -412,18 +394,19 @@ class MinimumTextContrastGuideline extends AccessibilityGuideline {
...
@@ -412,18 +394,19 @@ class MinimumTextContrastGuideline extends AccessibilityGuideline {
final
double
targetContrastRatio
=
this
.
targetContrastRatio
(
fontSize
,
bold:
isBold
);
final
double
targetContrastRatio
=
this
.
targetContrastRatio
(
fontSize
,
bold:
isBold
);
if
(
contrastRatio
-
targetContrastRatio
>=
_tolerance
)
{
if
(
contrastRatio
-
targetContrastRatio
>=
_tolerance
)
{
return
const
Evaluation
.
pass
();
return
result
+
const
Evaluation
.
pass
();
}
}
return
Evaluation
.
fail
(
return
result
+
'
$node
:
\n
'
Evaluation
.
fail
(
'Expected contrast ratio of at least
$targetContrastRatio
'
'
$node
:
\n
'
'but found
${contrastRatio.toStringAsFixed(2)}
'
'Expected contrast ratio of at least
$targetContrastRatio
'
'for a font size of
$fontSize
.
\n
'
'but found
${contrastRatio.toStringAsFixed(2)}
'
'The computed colors was:
\n
'
'for a font size of
$fontSize
.
\n
'
'light -
${report.lightColor}
, dark -
${report.darkColor}
\n
'
'The computed colors was:
\n
'
'See also: '
'light -
${report.lightColor}
, dark -
${report.darkColor}
\n
'
'https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html'
,
'See also: '
);
'https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html'
,
);
}
}
/// Returns whether node should be skipped.
/// Returns whether node should be skipped.
...
...
packages/flutter_test/test/accessibility_test.dart
View file @
41b50c22
...
@@ -23,61 +23,6 @@ void main() {
...
@@ -23,61 +23,6 @@ void main() {
handle
.
dispose
();
handle
.
dispose
();
});
});
testWidgets
(
'Multiple text with same label'
,
(
WidgetTester
tester
)
async
{
final
SemanticsHandle
handle
=
tester
.
ensureSemantics
();
await
tester
.
pumpWidget
(
_boilerplate
(
Column
(
children:
const
<
Widget
>[
Text
(
'this is a test'
,
style:
TextStyle
(
fontSize:
14.0
,
color:
Colors
.
black
),
),
Text
(
'this is a test'
,
style:
TextStyle
(
fontSize:
14.0
,
color:
Colors
.
black
),
),
],
),
),
);
await
expectLater
(
tester
,
meetsGuideline
(
textContrastGuideline
));
handle
.
dispose
();
});
testWidgets
(
'Multiple text with same label but Nodes excluded from '
'semantic tree have failing contrast should pass a11y guideline '
,
(
WidgetTester
tester
)
async
{
final
SemanticsHandle
handle
=
tester
.
ensureSemantics
();
await
tester
.
pumpWidget
(
_boilerplate
(
Column
(
children:
const
<
Widget
>[
Text
(
'this is a test'
,
style:
TextStyle
(
fontSize:
14.0
,
color:
Colors
.
black
),
),
SizedBox
(
height:
50
),
Text
(
'this is a test'
,
style:
TextStyle
(
fontSize:
14.0
,
color:
Colors
.
black
),
),
SizedBox
(
height:
50
),
ExcludeSemantics
(
child:
Text
(
'this is a test'
,
style:
TextStyle
(
fontSize:
14.0
,
color:
Colors
.
white
),
),
),
],
),
),
);
await
expectLater
(
tester
,
meetsGuideline
(
textContrastGuideline
));
handle
.
dispose
();
});
testWidgets
(
'white text on black background - Text Widget - direct style'
,
testWidgets
(
'white text on black background - Text Widget - direct style'
,
(
WidgetTester
tester
)
async
{
(
WidgetTester
tester
)
async
{
final
SemanticsHandle
handle
=
tester
.
ensureSemantics
();
final
SemanticsHandle
handle
=
tester
.
ensureSemantics
();
...
...
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