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Equality Matchers ​

as-test has three equality matchers with intentionally different semantics.

toBe ​

toBe checks identity or exact primitive equality.

ts
expect(1 + 2).toBe(3);
expect(name).toBe("demo");

Use toBe when you mean:

  • primitive equality
  • pointer identity
  • exact same managed instance

toEqual ​

toEqual performs deep equality.

ts
expect([1, 2, 3]).toEqual([1, 2, 3]);

For managed values, toEqual delegates to __as_test_equals(other, strict) when needed.

toStrictEqual ​

toStrictEqual performs deep equality with runtime-type matching for managed values.

ts
expect(actualUser).toStrictEqual(expectedUser);

This is stricter than toEqual because managed values also have to agree on runtime type identity.

toBeNull ​

toBeNull checks nullable values, and also treats usize(0) as null-like in the runtime helper.

ts
expect<string | null>(null).toBeNull();

Choosing Between Them ​

  • Use toBe for identity or plain primitive equality.
  • Use toEqual for deep structural comparisons.
  • Use toStrictEqual when runtime type mismatches should fail even if the shape matches.