test: AccountingOracle.submitReportData exited validarors count bound…

…aries scenarios

test/0.8.9/oracle/accounting-oracle-submit-report-data.test.js

@@ -355,6 +355,47 @@ contract('AccountingOracle', ([admin, account1, account2, member1, member2, stra
           'InvalidExitedValidatorsData()'
         )
       })
+
+      it('reverts with NumExitedValidatorsCannotDecrease if total count of exited validators less then previous exited number', async () => {
+        const totalExitedValidators = reportFields.numExitedValidatorsByStakingModule.reduce(
+          (sum, curr) => sum + curr,
+          0
+        )
+        await mockStakingRouter.setExitedKeysCountAcrossAllModules(totalExitedValidators + 1)
+        await assert.reverts(
+          oracle.submitReportData(reportItems, oracleVersion, { from: member1 }),
+          'NumExitedValidatorsCannotDecrease()'
+        )
+      })
+
+      it('does not reverts with NumExitedValidatorsCannotDecrease if total count of exited validators equals to previous exited number', async () => {
+        const totalExitedValidators = reportFields.numExitedValidatorsByStakingModule.reduce(
+          (sum, curr) => sum + curr,
+          0
+        )
+        await mockStakingRouter.setExitedKeysCountAcrossAllModules(totalExitedValidators)
+        await oracle.submitReportData(reportItems, oracleVersion, { from: member1 })
+      })
+
+      it('reverts with ExitedValidatorsLimitExceeded if exited validators rate limit will be reached', async () => {
+        // Really simple test here for now
+        // TODO: Come up with more tests for better coverage of edge-case scenarios that can be accrued
+        //       during calculation `exitedValidatorsPerDay` rate in AccountingOracle:612
+        const totalExitedValidators = reportFields.numExitedValidatorsByStakingModule.reduce(
+          (sum, curr) => sum + curr,
+          0
+        )
+        const exitingRateLimit = totalExitedValidators - 1
+        await oracleReportSanityChecker.setChurnValidatorsPerDayLimit(exitingRateLimit)
+        assert.equals(
+          (await oracleReportSanityChecker.getOracleReportLimits()).churnValidatorsPerDayLimit,
+          exitingRateLimit
+        )
+        await assert.reverts(
+          oracle.submitReportData(reportItems, oracleVersion, { from: member1 }),
+          `ExitedValidatorsLimitExceeded(${exitingRateLimit}, ${totalExitedValidators})`
+        )
+      })
     })
 
     context('delivers the data to corresponded contracts', () => {