Equality Operations

Test for value equality with these assertions.

equal / equals

Asserts that the target is strictly (==) equal to the given value.

expect("hello").to.equal("hello");
expect(42).to.equal(42);
expect(42).to.equals(42);  // alias

expect("hello").to.not.equal("world");

A null reference is equal to null; an empty (but non-null) value is not.

string s = null;
expect(s).to.equal(null);
expect("").to.not.equal(null);

Asserts that a numeric value is within a tolerance of the expected value.

expect(3.14159).to.be.approximately(3.14, 0.01);

Useful for floating-point comparisons where exact equality isn’t possible.