Run 'pub get' the first time the tests are run

packages/flutter_tools/lib/src/commands/init.dart

@@ -59,12 +59,12 @@ class InitCommand extends Command {
 
     if (argResults['pub']) {
       print("Running pub get...");
-      Process process = await Process.start(
-          sdkBinaryName('pub'), ['get'], workingDirectory: out.path);
-      stdout.addStream(process.stdout);
-      stderr.addStream(process.stderr);
-      int code = await process.exitCode;
-      if (code != 0) return code;
+      int code = await runCommandAndStreamOutput(
+        [sdkBinaryName('pub'), 'get'],
+        workingDirectory: out.path
+      );
+      if (code != 0)
+        return code;
     }
 
     print(message);

packages/flutter_tools/lib/src/commands/test.dart

@@ -11,6 +11,7 @@ import 'package:test/src/executable.dart' as executable;
 
 import '../artifacts.dart';
 import '../build_configuration.dart';
+import '../process.dart';
 import '../test/loader.dart' as loader;
 import 'flutter_command.dart';
 
@@ -36,7 +37,8 @@ class TestCommand extends FlutterCommand {
   @override
   Future<int> runInProject() async {
     List<String> testArgs = argResults.rest.toList();
-    Directory testDir = new Directory(path.join(ArtifactStore.flutterRoot, 'packages/unit/test'));
+    Directory flutterDir = new Directory(path.join(ArtifactStore.flutterRoot, 'packages/unit')); // see https://github.com/flutter/flutter/issues/50
+    Directory testDir = new Directory(path.join(flutterDir.path, 'test'));
     if (testArgs.isEmpty) {
       testArgs.addAll(testDir.listSync(recursive: true, followLinks: false)
                              .where((FileSystemEntity entity) => entity.path.endsWith('_test.dart') && FileSystemEntity.isFileSync(entity.path))
@@ -47,9 +49,27 @@ class TestCommand extends FlutterCommand {
       testArgs.insert(0, '--no-color');
     List<BuildConfiguration> configs = buildConfigurations;
     bool foundOne = false;
+
+    File pubSpecYaml = new File(path.join(flutterDir.path, 'pubspec.yaml'));
+    File pubSpecLock = new File(path.join(flutterDir.path, 'pubspec.lock'));
+
+    if (!pubSpecYaml.existsSync()) {
+      print('${flutterDir.path} has no pubspec.yaml');
+      return 1;
+    }
+
+    if (!pubSpecLock.existsSync() || pubSpecYaml.lastModifiedSync().isAfter(pubSpecLock.lastModifiedSync())) {
+      print("Running pub get...");
+      int code = await runCommandAndStreamOutput(
+        [sdkBinaryName('pub'), 'get'],
+        workingDirectory: flutterDir.path
+      );
+      if (code != 0)
+        return code;
+    }
+
     String currentDirectory = Directory.current.path;
-    Directory.current = testDir.path;
-    // TODO(ianh): Verify that this directory has had 'pub get' run in it at least once.
+    Directory.current = flutterDir.path;
     loader.installHook();
     for (BuildConfiguration config in configs) {
       if (!config.testable)

packages/flutter_tools/lib/src/process.dart

@@ -12,11 +12,17 @@ final Logger _logging = new Logger('sky_tools.process');
 
 /// This runs the command and streams stdout/stderr from the child process to
 /// this process' stdout/stderr.
-Future<int> runCommandAndStreamOutput(List<String> cmd,
-    {String prefix: '', RegExp filter}) async {
+Future<int> runCommandAndStreamOutput(List<String> cmd, {
+  String prefix: '',
+  RegExp filter,
+  String workingDirectory
+}) async {
   _logging.info(cmd.join(' '));
-  Process proc =
-      await Process.start(cmd[0], cmd.getRange(1, cmd.length).toList());
+  Process proc = await Process.start(
+    cmd[0],
+    cmd.getRange(1, cmd.length).toList(),
+    workingDirectory: workingDirectory
+  );
   proc.stdout.transform(UTF8.decoder).listen((String data) {
     List<String> dataLines = data.trimRight().split('\n');
     if (filter != null) {
@@ -65,7 +71,7 @@ String runSync(List<String> cmd) => _runWithLoggingSync(cmd);
 /// Return the platform specific name for the given Dart SDK binary. So, `pub`
 /// ==> `pub.bat`.
 String sdkBinaryName(String name) {
-  return Platform.isWindows ? '${name}.bat' : name;
+  return Platform.isWindows ? '$name.bat' : name;
 }
 
 String _runWithLoggingSync(List<String> cmd, {bool checked: false}) {

packages/flutter_tools/lib/src/test/loader.dart

@@ -120,6 +120,9 @@ void main() {
           case -0x0b: // ProcessSignal.SIGSEGV
             output += 'Segmentation fault in subprocess for: $path\n';
             break;
+          case -0x06: // ProcessSignal.SIGABRT
+            output += 'Aborted while running: $path\n';
+            break;
           default:
             output += 'Unexpected exit code $exitCode from subprocess for: $path\n';
         }