1.9 Test Cases

(check-expect expr expr)

A test case to check that the first expr produces the same value as the second expr, where the latter is normally an immediate value.

(check-within expr expr expr)

Like check-expect, but with an extra expression that produces a number delta. The test case checks that each number in the result of the first expr is within delta of each corresponding number from the second expr.

(check-error expr expr)

A test case to check that the first expr signals an error, where the error messages matches the string produced by the second expr.