Add test for transaction price errors with hardhat_mine (#845)

Author: cgewecke

test/integration/standard.js

@@ -304,6 +304,22 @@ describe('Hardhat Plugin: standard use cases', function() {
     verify.lineCoverage(expected);
   })
 
+  it('can use hardhat_mine without erroring', async function(){
+    mock.installFullProject('hardhat-mine');
+    mock.hardhatSetupEnv(this);
+
+    await this.env.run("coverage");
+
+    const expected = [
+      {
+        file: mock.pathToContract(hardhatConfig, 'Setter.sol'),
+        pct: 100
+      }
+    ];
+
+    verify.lineCoverage(expected);
+  })
+
   // This test freezes when gas-reporter is not disabled
   it('disables hardhat-gas-reporter', async function() {
     mock.installFullProject('hardhat-gas-reporter');

test/sources/projects/hardhat-mine/.solcover.js

@@ -0,0 +1,7 @@
+// Testing hooks
+const fn = (msg, config) => config.logger.log(msg);
+
+module.exports = {
+  silent: process.env.SILENT ? true : false,
+  istanbulReporter: ['json-summary', 'text'],
+}

test/sources/projects/hardhat-mine/contracts/Setter.sol

@@ -0,0 +1,12 @@
+pragma solidity >=0.8.0 <0.9.0;
+
+
+contract Setter {
+  uint x;
+  constructor() public {
+  }
+
+  function set() public {
+    x = 1;
+  }
+}

test/sources/projects/hardhat-mine/hardhat.config.js

@@ -0,0 +1,10 @@
+require("@nomiclabs/hardhat-waffle");
+require("@nomiclabs/hardhat-ethers");
+require(__dirname + "/../plugins/nomiclabs.plugin");
+
+module.exports = {
+  solidity: {
+    version: "0.8.17"
+  },
+  logger: process.env.SILENT ? { log: () => {} } : console,
+};

test/sources/projects/hardhat-mine/test/testMine.js

@@ -0,0 +1,22 @@
+const { expect } = require("chai");
+const { ethers } = require("hardhat");
+
+describe("Setter", function() {
+  let instance;
+
+  before(async () => {
+    const factory = await ethers.getContractFactory("Setter");
+    instance = await factory.deploy();
+  });
+
+  it('sets at the beginning', async function(){
+    await instance.set();
+  });
+
+  it('sets at the end', async function(){
+    // Mine about 50K blocks
+    await hre.network.provider.send('hardhat_mine', ['0xCCCC'])
+    await instance.set();
+  });
+});
+