Added utility for faster local testing (#2235)
* Added utility for faster local testing
diff --git a/tool/test.sh b/tool/test.sh
new file mode 100755
index 0000000..9485558
--- /dev/null
+++ b/tool/test.sh
@@ -0,0 +1,34 @@
+#!/bin/bash -e
+
+### Test wrapper script.
+# Many of the integration tests runs the `pub` command, this is slow if every
+# invocation requires the dart compiler to load all the sources. This script
+# will create a `bin/pub.dart.snapshot.dart2` which the tests can utilize.
+# After creating the snapshot this script will forward arguments to
+# `pub run test`, and ensure that the snapshot is deleted after tests have been
+# run.
+#
+# Notice that it is critical that this file is deleted before running tests
+# again, as tests otherwise won't load the pub sources.
+
+# Find folder containing this script.
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+ROOT="$DIR/.."
+
+# Always remove the snapshot
+function cleanup {
+ rm -f "$ROOT/bin/pub.dart.snapshot.dart2"
+}
+trap cleanup EXIT;
+
+# Build a snapshot for faster testing
+echo 'Building snapshot'
+(
+ cd "$ROOT/";
+ rm -f "$ROOT/bin/pub.dart.snapshot.dart2"
+ dart --snapshot=bin/pub.dart.snapshot.dart2 bin/pub.dart
+)
+
+# Run tests
+echo 'Running tests'
+pub run test -r expanded "$@"
