Merge pull request #350 from objectbox/chore/dart-sdk-2_15

Fix CI for Dart SDK 2.15

Author: greenrobot-team

.github/workflows/dart.yml

@@ -41,6 +41,8 @@ jobs:
           - ubuntu-20.04
         sdk:
           - stable
+          - 2.14.0
+          - 2.13.0
           - 2.12.0  # currently the lowest fully supported version (i.e. generator + lib)
     runs-on: ${{ matrix.os }}
     steps:

objectbox/tool/valgrind.sh

@@ -1,7 +1,7 @@
 . "$(dirname "$0")"/common.sh
 
-# Note: when you see the process seemingly stuck after printing "All tests passed!", it's because dart2native produced
-#       binaries will wait for any background isolates to finish before stopping the process.
+# Note: when you see the process seemingly stuck after printing "All tests passed!", it's because `dart compile exe`
+#       produced binaries will wait for any background isolates to finish before stopping the process.
 #       For example, the following code has the issue: `HttpClient().get(...)`
 #       while `final httpClient = HttpClient(); httpClient.get(...); httpClient.close(force: true);` works fine.
 
@@ -19,7 +19,7 @@ mkdir -pv "${testDir}"
 function testWithValgrind() {
   echo "Running $1 with valgrind"
   testExe="${testDir}/${1%.*}"
-  dart2native "${root}/test/${1}" --output "${testExe}" --verbose
+  dart compile exe "${root}/test/${1}" --output "${testExe}" --verbose
   valgrind \
     --leak-check=full \
     --error-exitcode=1 \