Hide away support modules.

substrate/wasm-runtime/polkadot/src/support/testing.rs

@@ -0,0 +1,19 @@
+use runtime_support::{NoError, Externalities};
+use std::collections::HashMap;
+
+#[derive(Debug, Default)]
+pub struct TestExternalities {
+	pub storage: HashMap<Vec<u8>, Vec<u8>>,
+}
+
+impl Externalities for TestExternalities {
+	type Error = NoError;
+
+	fn storage(&self, key: &[u8]) -> Result<&[u8], NoError> {
+		Ok(self.storage.get(&key.to_vec()).map_or(&[] as &[u8], Vec::as_slice))
+	}
+
+	fn set_storage(&mut self, key: Vec<u8>, value: Vec<u8>) {
+		self.storage.insert(key, value);
+	}
+}