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authorLeonid Logvinov <logvinov.leon@gmail.com>2017-12-08 22:59:44 +0800
committerLeonid Logvinov <logvinov.leon@gmail.com>2017-12-14 22:47:02 +0800
commit6120a43fff7b1b1aa1813533f3a990bb72df74a0 (patch)
treed508de143764fba7b31fcad06d1123725d03654f /packages/dev-utils/src/blockchain_lifecycle.ts
parent02e7354b5324b80f1e5a6a2968d05de44820498c (diff)
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Create dev-utils with blockchainLifecycle in it
Diffstat (limited to 'packages/dev-utils/src/blockchain_lifecycle.ts')
-rw-r--r--packages/dev-utils/src/blockchain_lifecycle.ts26
1 files changed, 26 insertions, 0 deletions
diff --git a/packages/dev-utils/src/blockchain_lifecycle.ts b/packages/dev-utils/src/blockchain_lifecycle.ts
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+++ b/packages/dev-utils/src/blockchain_lifecycle.ts
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+import {RPC} from './rpc';
+
+export class BlockchainLifecycle {
+ private rpc: RPC;
+ private snapshotIdsStack: number[];
+ constructor(url: string) {
+ this.rpc = new RPC(url);
+ this.snapshotIdsStack = [];
+ }
+ // TODO: In order to run these tests on an actual node, we should check if we are running against
+ // TestRPC, if so, use snapshots, otherwise re-deploy contracts before every test
+ public async startAsync(): Promise<void> {
+ const snapshotId = await this.rpc.takeSnapshotAsync();
+ this.snapshotIdsStack.push(snapshotId);
+ }
+ public async revertAsync(): Promise<void> {
+ const snapshotId = this.snapshotIdsStack.pop() as number;
+ const didRevert = await this.rpc.revertSnapshotAsync(snapshotId);
+ if (!didRevert) {
+ throw new Error(`Snapshot with id #${snapshotId} failed to revert`);
+ }
+ }
+ public async mineABlock(): Promise<void> {
+ await this.rpc.mineBlockAsync();
+ }
+}