Add basic e2e test for snapshot

Author: foriequal0

test/src/e2e/snapshot.test.ts

@@ -0,0 +1,66 @@
+// Copyright 2018-2019 Kodebox, Inc.
+// This file is part of CodeChain.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import { expect } from "chai";
+import * as fs from "fs";
+import "mocha";
+import * as path from "path";
+
+import { aliceAddress } from "../helper/constants";
+import CodeChain from "../helper/spawn";
+
+const SNAPSHOT_PATH = `${__dirname}/../../../snapshot/`;
+
+describe("Snapshot", async function() {
+    let node: CodeChain;
+    before(async function() {
+        node = new CodeChain({
+            argv: ["--snapshot-path", SNAPSHOT_PATH]
+        });
+        await node.start();
+    });
+
+    it("can make a snapshot when it is requsted with devel rpc", async function() {
+        const pay = await node.sendPayTx({
+            quantity: 100,
+            recipient: aliceAddress
+        });
+
+        const blockHash = (await node.sdk.rpc.chain.getTransaction(pay.hash()))!
+            .blockHash!;
+        await node.sdk.rpc.sendRpcRequest("devel_snapshot", [
+            blockHash.toJSON()
+        ]);
+        // Wait for 1 secs
+        await new Promise(resolve => setTimeout(resolve, 1000));
+
+        const stateRoot = (await node.sdk.rpc.chain.getBlock(blockHash))!
+            .stateRoot;
+        expect(
+            path.join(SNAPSHOT_PATH, blockHash.toString(), stateRoot.toString())
+        ).to.satisfies(fs.existsSync);
+    });
+
+    afterEach(function() {
+        if (this.currentTest!.state === "failed") {
+            node.keepLogs();
+        }
+    });
+
+    after(async function() {
+        await node.clean();
+    });
+});