What does the following test do$?$

@Test

void multipyWithScalar$\_$mysteryTest$()\{$

Matrix $m=$ new Matrix $(2,2)$;

assertFalse$($m$.$ equals $($new Matrix $(2,1))$;

$\}$

Tests that equals$()$ method returns null if it is passed null

Tests that equals$()$ method returns true if it is passed the same matrix as $m$

Tests that equals$()$ method returns false if it is passed a matrix of a different size than $m$