fix: Start Metro packager from $PROJECT_DIR

scripts/packager.sh

@@ -4,9 +4,20 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# scripts directory
 THIS_DIR=$(cd -P "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo "${BASH_SOURCE[0]}")")" && pwd)
+REACT_NATIVE_ROOT="$THIS_DIR/.."
+# Application root directory - General use case: react-native is a dependency
+PROJECT_ROOT="$THIS_DIR/../../.."
 
 # shellcheck source=/dev/null
 source "${THIS_DIR}/.packager.env"
-cd "$THIS_DIR/.." || exit
-node "./cli.js" start "$@"
+
+# When running react-native tests, react-native doesn't live in node_modules but in the PROJECT_ROOT
+if [ ! -d "$PROJECT_ROOT/node_modules/react-native" ];
+then
+  PROJECT_ROOT="$THIS_DIR/.."
+fi
+# Start packager from PROJECT_ROOT
+cd "$PROJECT_ROOT" || exit
+node "$REACT_NATIVE_ROOT/cli.js" start "$@"