[flutter_tools] custom devices tests were not running on CI #98436
Description
A test file was not running on CI because it did not end in _test.dart: https://github.com/flutter/flutter/blob/024d5f8aaa7a4618fd583563bdbfd42f524c0040/packages/flutter_tools/test/commands.shard/hermetic/custom_devices.dart. When I ran it, 6 tests were failing, such as:
00:01 +6: linux custom-devices add command correctly adds ssh device config on linux
Could not load custom device from config index 0: Expected postBuild to be null or array of strings with at least one element.
#0 CustomDevicesConfig.devices (package:flutter_tools/src/custom_devices/custom_devices_config.dart:144:9)
#1 main.<anonymous closure>.<anonymous closure> (file:///Users/fujino/git/flutter/packages/flutter_tools/test/commands.shard/hermetic/custom_devices_test.dart:542:18)
<asynchronous suspension>
#2 testUsingContext.<anonymous closure>.<anonymous closure>.<anonymous closure>.<anonymous closure>.<anonymous closure> (file:///Users/fujino/git/flutter/packages/flutter_tools/test/src/context.dart:143:26)
<asynchronous suspension>
#3 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
<asynchronous suspension>
#4 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
<asynchronous suspension>
#5 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
<asynchronous suspension>
#6 testUsingContext.<anonymous closure> (file:///Users/fujino/git/flutter/packages/flutter_tools/test/src/context.dart:104:5)
<asynchronous suspension>
#7 Declarer.test.<anonymous closure>.<anonymous closure> (package:test_api/src/backend/declarer.dart:215:9)
<asynchronous suspension>
#8 Declarer.test.<anonymous closure> (package:test_api/src/backend/declarer.dart:213:7)
<asynchronous suspension>
#9 Invoker._waitForOutstandingCallbacks.<anonymous closure> (package:test_api/src/backend/invoker.dart:257:7)
<asynchronous suspension>
00:01 +6 -1: linux custom-devices add command correctly adds ssh device config on linux [E]
Could not load custom device from config index 0: Expected postBuild to be null or array of strings with at least one element.
package:flutter_tools/src/custom_devices/custom_devices_config.dart 144:9 CustomDevicesConfig.devices
test/commands.shard/hermetic/custom_devices_test.dart 542:18 main.<fn>.<fn>
===== asynchronous gap ===========================
test/src/context.dart 143:26 testUsingContext.<fn>.<fn>.<fn>.<fn>.<fn>
===== asynchronous gap ===========================
package:flutter_tools/src/base/context.dart 150:19 AppContext.run.<fn>
===== asynchronous gap ===========================
package:flutter_tools/src/base/context.dart 150:19 AppContext.run.<fn>
===== asynchronous gap ===========================
package:flutter_tools/src/base/context.dart 150:19 AppContext.run.<fn>
===== asynchronous gap ===========================
test/src/context.dart 104:5 testUsingContext.<fn>
I have also seen this error locally, so there may be a real regression with the custom devices system.