rspec-sql

# Gemfile
gem "rspec-sql"

# Assert any database queries:
expect { User.last }.to query_database

# Assert no database queries:
expect { nil }.to_not query_database

# Assert exact number of queries:
expect { User.last }.to query_database 1
expect { User.create }.to query_database 3.times

# Assert a specific query list:
expect { User.last }.to query_database ["User Load"]

expect { User.create!.update(name: "Jane") }.to query_database [
  "TRANSACTION",
  "User Create",
  "TRANSACTION",
  "TRANSACTION",
  "User Update",
  "TRANSACTION",
]

# Assert a specific query summary:
expect { User.create!.update(name: "Jane") }.to query_database(
  {
    insert: { users: 1 },
    update: { users: 1 },
  }
)