Merge branch 'master' into mascara-deploy

1 files changed, 31 insertions, 0 deletions

diff --git a/test/stub/provider.js b/test/stub/provider.js
new file mode 100644
index 000000000..e77db4e28
--- /dev/null
+++ b/test/stub/provider.js
@@ -0,0 +1,31 @@
+const JsonRpcEngine = require('json-rpc-engine')
+const scaffoldMiddleware = require('eth-json-rpc-middleware/scaffold')
+const TestBlockchain = require('eth-block-tracker/test/util/testBlockMiddleware')
+
+module.exports = {
+  createEngineForTestData,
+  providerFromEngine,
+  scaffoldMiddleware,
+  createTestProviderTools,
+}
+
+
+function createEngineForTestData () {
+  return new JsonRpcEngine()
+}
+
+function providerFromEngine (engine) {
+  const provider = { sendAsync: engine.handle.bind(engine) }
+  return provider
+}
+
+function createTestProviderTools (opts = {}) {
+  const engine = createEngineForTestData()
+  const testBlockchain = new TestBlockchain()
+  // handle provided hooks
+  engine.push(scaffoldMiddleware(opts.scaffold || {}))
+  // handle block tracker methods
+  engine.push(testBlockchain.createMiddleware())
+  const provider = providerFromEngine(engine)
+  return { provider, engine, testBlockchain }
+}