DT
Drizzle Team•2w ago
Alex

How to test query operators with Jest?

Hi everyone I’m writing some unit tests with Jest for my repository methods. For example, I have something like this: 
await db.query.userTable.findFirst({
  where: (user, { eq }) => eq(user.id, id),
});
await db.query.userTable.findFirst({
  where: (user, { eq }) => eq(user.id, id),
});
In my test, I’d like to assert what arguments I pass into findFirst (or findMany), especially the where condition. The problem is that the operators (eq, and, or, etc.) are functions, so I can’t easily compare the where callback or check the arguments directly. What’s the recommended way to test this? Should I mock the operators, or is there a better practice to verify the where conditions in tests? Thanks! 🙏
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