add GovernorHelper class

tests/e2e/governance/helper.ts

@@ -0,0 +1,58 @@
+import BN from 'bn.js'
+import {Transaction, VoteType} from '../../../typechain-generated/types-arguments/my_governor'
+import ContractGovernance from '../../../typechain-generated/contracts/my_governor'
+import {KeyringPair} from '@polkadot/keyring/types'
+import {expect} from 'chai'
+
+export class GovernorHelper {
+  private proposal: Transaction | undefined;
+  private description: string | undefined;
+  private governor: ContractGovernance | undefined;
+  private proposalId: number[] | undefined;
+
+  constructor(governor: ContractGovernance) {
+    this.governor = governor
+  }
+
+  addProposal(callee: string, selector: number[], input: (string | number | BN)[], description: string) {
+    this.proposal = {
+      callee: callee,
+      selector: selector,
+      destination: callee,
+      input: input,
+      transferredValue: 0,
+      gasLimit: 1000000000000
+    }
+    this.description = description
+  }
+
+  getProposalId(): number[] | undefined {
+    return this.proposalId
+  }
+
+  async propose(proposer: KeyringPair) {
+    if (this.proposal === undefined || this.description === undefined) {
+      throw new Error('Proposal not set')
+    }
+    // todo: check how proposal Id is calculated
+    this.proposalId = (await this.governor?.query.propose([this.proposal!], this.description!))?.value.unwrapRecursively().ok
+    await this.governor?.withSigner(proposer).tx.propose([this.proposal!], this.description!)
+  }
+
+  async waitForSnapshot() {
+    const proposalSnapshot = (await this.governor?.query.proposalSnapshot(this.proposalId as unknown as number[]))?.value.unwrapRecursively().ok
+    await this.governor?.tx.setBlockTimestamp(proposalSnapshot as number)
+  }
+
+  async castVote(voter: KeyringPair, vote: VoteType) {
+    if (this.proposalId === undefined) {
+      throw new Error('Proposal Id not set')
+    }
+    await this.governor?.withSigner(voter).tx.castVote(this.proposalId, vote)
+  }
+
+  async waitForDeadline() {
+    const proposalDeadline = (await this.governor?.query.proposalDeadline(this.proposalId as unknown as number[]))?.value.unwrapRecursively().ok
+    await this.governor?.tx.setBlockTimestamp(proposalDeadline as number)
+  }
+}