feat: mining mode switch to disable auto-mine (#6450)

* feat: mining mode switch to update so we can make assertions about pending transaction state

* update test to use explicit mining

* Update hardhat.config.js
Co-authored-by: Zach Pomerantz <zzmp@uniswap.org>

---------
Co-authored-by: Zach Pomerantz <zzmp@uniswap.org>

cypress/e2e/swap.test.ts

@@ -96,6 +96,8 @@ describe('Swap', () => {
         cy.get('#swap-button').click()
         cy.get('#confirm-swap-or-send').click()
         cy.get(getTestSelector('dismiss-tx-confirmation')).click()
+
+        cy.then(() => hardhat.send('hardhat_mine', ['0x1', '0xc'])).then(() => {
           // ui check
           cy.get('#swap-currency-output [data-testid="balance-text"]').should(
             'have.text',
@@ -108,6 +110,7 @@ describe('Swap', () => {
             .should('eq', initialBalance + BALANCE_INCREMENT)
         })
       })
+  })
 
   it('should have the correct default input/output and token selection should work', () => {
     cy.visit('/swap')

hardhat.config.js

@@ -21,6 +21,11 @@ module.exports = {
       accounts: {
         count: 1,
       },
+      // Disable auto-mining so that e2e tests can explicitly test pending states.
+      mining: {
+        auto: false,
+        interval: 0,
+      },
     },
   },
 }