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How to write tests with flag widgets #24

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PMatthaei opened this issue Jun 2, 2020 · 2 comments
Open

How to write tests with flag widgets #24

PMatthaei opened this issue Jun 2, 2020 · 2 comments
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@LunaGao
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enhancement New feature or request good first issue Good for newcomers

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@PMatthaei
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I am currently trying to write a test concerning a widget which includes
Flag.getFlags(...)

when running the test for the first time i receive the error copied below. When the same test runs a second time (chronologically after the first) it seems to run through. How should i write tests with flag-widgets?

══╡ EXCEPTION CAUGHT BY SVG ╞═══════════════════════════════════════════════════════════════════════
The following assertion was thrown resolving a single-frame picture stream:
Unable to load asset: packages/flag/res/flag/de.svg

When the exception was thrown, this was the stack:
#0 PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)

#1 AssetBundle.loadString (package:flutter/src/services/asset_bundle.dart:67:33)
#2 CachingAssetBundle.loadString. (package:flutter/src/services/asset_bundle.dart:162:56)
#3 _LinkedHashMapMixin.putIfAbsent (dart:collection-patch/compact_hash.dart:293:23)
#4 CachingAssetBundle.loadString (package:flutter/src/services/asset_bundle.dart:162:27)
#5 AssetBundlePictureProvider._loadAsync (package:flutter_svg/src/picture_provider.dart:449:42)
#6 AssetBundlePictureProvider.load (package:flutter_svg/src/picture_provider.dart:435:43)
#7 PictureProvider.resolve.. (package:flutter_svg/src/picture_provider.dart:327:17)
#8 PictureCache.putIfAbsent (package:flutter_svg/src/picture_cache.dart:67:22)
#9 PictureProvider.resolve. (package:flutter_svg/src/picture_provider.dart:325:16)
#10 SynchronousFuture.then (package:flutter/src/foundation/synchronous_future.dart:38:29)
#11 PictureProvider.resolve (package:flutter_svg/src/picture_provider.dart:322:24)
#12 _SvgPictureState._resolveImage (package:flutter_svg/svg.dart:641:10)
#13 _SvgPictureState.didChangeDependencies (package:flutter_svg/svg.dart:615:5)
#14 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4376:12)
#15 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#16 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#17 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#18 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#19 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#20 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#21 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#22 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#23 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#24 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#25 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#26 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#27 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#28 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#29 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#30 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#31 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#32 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#33 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#34 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#35 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#36 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#37 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#38 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#39 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#40 _ListTileElement._mountChild (package:flutter/src/material/list_tile.dart:999:30)
#41 _ListTileElement.mount (package:flutter/src/material/list_tile.dart:1015:5)
#42 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#43 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#44 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#45 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#46 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#47 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#48 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#49 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#50 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#51 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#52 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#53 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#54 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#55 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#56 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#57 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#58 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#59 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#60 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#61 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#62 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#63 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#64 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#65 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#66 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#67 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#68 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#69 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#70 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#71 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#72 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#73 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#74 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#75 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#76 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#77 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#78 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#79 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#80 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#81 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#82 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#83 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#84 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#85 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#86 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#87 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#88 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#89 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#90 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#91 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#92 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#93 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#94 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#95 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#96 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#97 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#98 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#99 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#100 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#101 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#102 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#103 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#104 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#105 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#106 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#107 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#108 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#109 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#110 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#111 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#112 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#113 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#114 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#115 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#116 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#117 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#118 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#119 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#120 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#121 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#122 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#123 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#124 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5551:32)
#125 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#126 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#127 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#128 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#129 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#130 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#131 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#132 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#133 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#134 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#135 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#136 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#137 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#138 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#139 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#140 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#141 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#142 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#143 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#144 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#145 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#146 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#147 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#148 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#149 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#150 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#151 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#152 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#153 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#154 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#155 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#156 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#157 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#158 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#159 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#160 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#161 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#162 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#163 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#164 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#165 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#166 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#167 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#168 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#169 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#170 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#171 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#172 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#173 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#174 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#175 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#176 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#177 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#178 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#179 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#180 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#181 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#182 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#183 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#184 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#185 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#186 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#187 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#188 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#189 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#190 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#191 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#192 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#193 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#194 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#195 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#196 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#197 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#198 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#199 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#200 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#201 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#202 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#203 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#204 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#205 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#206 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#207 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#208 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#209 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#210 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#211 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#212 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#213 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
#214 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#215 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#216 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#217 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#218 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#219 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#220 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#221 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#222 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#223 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#224 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#225 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#226 ParentDataElement.mount (package:flutter/src/widgets/framework.dart:4617:11)
#227 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#228 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#229 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#230 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#231 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#232 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
#233 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#234 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#235 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#236 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
#237 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#238 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#239 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#240 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
#241 Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
#242 SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1288:36)
#243 SliverMultiBoxAdaptorElement.createChild. (package:flutter/src/widgets/sliver.dart:1273:20)
#244 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2412:19)
#245 SliverMultiBoxAdaptorElement.createChild (package:flutter/src/widgets/sliver.dart:1266:11)
#246 RenderSliverMultiBoxAdaptor._createOrObtainChild. (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:354:23)
#247 RenderObject.invokeLayoutCallback. (package:flutter/src/rendering/object.dart:1823:58)
#248 PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:875:15)
#249 RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:1823:13)
#250 RenderSliverMultiBoxAdaptor._createOrObtainChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:343:5)
#251 RenderSliverMultiBoxAdaptor.addInitialChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:427:5)
#252 RenderSliverList.performLayout (package:flutter/src/rendering/sliver_list.dart:78:12)
#253 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#254 RenderSliverEdgeInsetsPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:134:11)
#255 RenderSliverPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:373:11)
#256 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#257 RenderViewportBase.layoutChildSequence (package:flutter/src/rendering/viewport.dart:410:13)
#258 RenderViewport._attemptLayout (package:flutter/src/rendering/viewport.dart:1367:12)
#259 RenderViewport.performLayout (package:flutter/src/rendering/viewport.dart:1285:20)
#260 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#261 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#262 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#263 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#264 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#265 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#266 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#267 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#268 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#269 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#270 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#271 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#272 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#273 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#274 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#275 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#276 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#277 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#278 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#279 MultiChildLayoutDelegate.layoutChild (package:flutter/src/rendering/custom_layout.dart:163:11)
#280 _ScaffoldLayout.performLayout (package:flutter/src/material/scaffold.dart:477:7)
#281 MultiChildLayoutDelegate._callPerformLayout (package:flutter/src/rendering/custom_layout.dart:232:7)
#282 RenderCustomMultiChildLayoutBox.performLayout (package:flutter/src/rendering/custom_layout.dart:391:14)
#283 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#284 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#285 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#286 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#287 _RenderCustomClip.performLayout (package:flutter/src/rendering/proxy_box.dart:1232:11)
#288 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#289 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#290 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#291 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#292 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#293 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#294 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#295 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#296 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#297 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#298 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#299 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#300 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#301 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#302 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#303 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#304 RenderOffstage.performLayout (package:flutter/src/rendering/proxy_box.dart:3168:13)
#305 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#306 RenderStack.performLayout (package:flutter/src/rendering/stack.dart:505:15)
#307 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#308 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#309 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#310 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#311 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#312 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#313 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#314 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#315 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#316 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#317 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#318 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#319 RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
#320 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
#321 RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:1584:7)
#322 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:844:18)
#323 AutomatedTestWidgetsFlutterBinding.drawFrame (package:flutter_test/src/binding.dart:977:23)
#324 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:283:5)
#325 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1102:15)
#326 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1041:9)
#327 AutomatedTestWidgetsFlutterBinding.pump. (package:flutter_test/src/binding.dart:872:9)
#330 TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:69:41)
#331 AutomatedTestWidgetsFlutterBinding.pump (package:flutter_test/src/binding.dart:859:27)
#332 WidgetTester.pump. (package:flutter_test/src/widget_tester.dart:343:53)
#335 TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:69:41)
#336 WidgetTester.pump (package:flutter_test/src/widget_tester.dart:343:27)
#337 main.. (file:///C:/Projekte/aphasia-flutter-app/test/widgets/word_trainer/deck_list_widget_test.dart:62:20)
#351 AutomatedTestWidgetsFlutterBinding.runTest. (package:flutter_test/src/binding.dart:1066:17)
#353 AutomatedTestWidgetsFlutterBinding.runTest. (package:flutter_test/src/binding.dart:1054:35)
(elided 33 frames from class _FakeAsync, package dart:async, package dart:async-patch, and package stack_trace)

Picture provider: ExactAssetPicture(name: "packages/flag/res/flag/de.svg", bundle: null,
colorFilter: null)
Picture key: AssetBundlePictureKey(bundle: PlatformAssetBundle#06fc8(), name:
"packages/flag/res/flag/de.svg", colorFilter: null)
@LunaGao
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LunaGao commented Jun 2, 2020

@PMatthaei Good point. I never thought about this problem.
Would you share some test code so that I can better understand how to help you solve this problem?

@LunaGao LunaGao added enhancement New feature or request good first issue Good for newcomers labels Jun 2, 2020
@PMatthaei
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I guess this test should be able to run in a project which is importing this package.

import 'package:flutter_test/flutter_test.dart';

import 'package:flag/flag.dart';

void main() {
  testWidgets('flag widget test', (WidgetTester tester) async {
    await tester.pumpWidget(Flags.getFlag(country: 'AD'));
  });
}

@LunaGao LunaGao self-assigned this Aug 2, 2020
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