public void testPPmt() {
assertEquals(-607.9248252633897, Vba.pPmt(0.10, 1, 30, 100000, 0, false));
assertEquals(-8422.451500705567, Vba.pPmt(0.10, 15, 30, 100000, 0, false));
assertEquals(-10547.13234273705, Vba.pPmt(0.10, 30, 30, 100000, 0, false));
// verify that pmt, ipmt, and ppmt add up
double pmt = Vba.pmt(0.10, 30, 100000, 0, false);
double ipmt = Vba.iPmt(0.10, 15, 30, 100000, 0, false);
double ppmt = Vba.pPmt(0.10, 15, 30, 100000, 0, false);
assertTrue(Math.abs(pmt - (ipmt + ppmt)) < 0.0000001);
}
public void testIPmt() {
assertEquals(-10000.0, Vba.iPmt(0.10, 1, 30, 100000, 0, false));
assertEquals(-2185.473324557822, Vba.iPmt(0.10, 15, 30, 100000, 0, false));
assertEquals(-60.79248252633988, Vba.iPmt(0.10, 30, 30, 100000, 0, false));
}