Executed UTC: 2026-10-10T05:03:10Z
Runtime: v24.19.0

$ node test-discount.mjs faulty
PASS ordinary exact | amount=1200 rate=20 expected=960 actual=960
PASS ordinary fraction | amount=1999 rate=15 expected=1699 actual=1699
FAIL half-unit boundary | amount=101 rate=50 expected=51 actual=50  50 !== 51 
PASS below half-unit | amount=1 rate=51 expected=0 actual=0
FAIL exact half-unit | amount=1 rate=50 expected=1 actual=0  0 !== 1 
PASS above half-unit | amount=1 rate=49 expected=1 actual=1
PASS zero amount | amount=0 rate=25 expected=0 actual=0
PASS zero discount | amount=101 rate=0 expected=101 actual=101
PASS full discount | amount=101 rate=100 expected=0 actual=0
PASS maximum amount | amount=1000000000 rate=0 expected=1000000000 actual=1000000000
PASS maximum amount discounted | amount=1000000000 rate=99 expected=10000000 actual=10000000
PASS maximum amount full discount | amount=1000000000 rate=100 expected=0 actual=0
PASS negative amount | amount=-1 rate=20 throws RangeError
PASS amount over cap | amount=1000000001 rate=20 throws RangeError
PASS fractional amount | amount=1.5 rate=20 throws TypeError
PASS blank amount | amount='' rate=20 throws TypeError
PASS numeric string amount | amount='101' rate=20 throws TypeError
PASS null amount | amount=null rate=20 throws TypeError
PASS missing amount | amount=undefined rate=20 throws TypeError
PASS boolean amount | amount=true rate=20 throws TypeError
PASS array amount | amount=[] rate=20 throws TypeError
PASS object amount | amount={} rate=20 throws TypeError
PASS NaN amount | amount=NaN rate=20 throws TypeError
PASS infinite amount | amount=Infinity rate=20 throws TypeError
PASS unsafe integer amount | amount=9007199254740992 rate=20 throws TypeError
PASS negative rate | amount=101 rate=-1 throws RangeError
PASS rate over cap | amount=101 rate=101 throws RangeError
PASS fractional rate | amount=101 rate=12.5 throws TypeError
PASS blank rate | amount=101 rate='' throws TypeError
PASS numeric string rate | amount=101 rate='50' throws TypeError
PASS missing rate | amount=101 rate=undefined throws TypeError
PASS NaN rate | amount=101 rate=NaN throws TypeError
PASS infinite rate | amount=101 rate=Infinity throws TypeError
FAIL repeated calculation A B A | expected=[960,51,960] actual=[960,50,960] + actual - expected    [     960, +   50, -   51,     960   ] 
PASS valid calculation after invalid input | rejected blank amount, then expected=960 actual=960
SUMMARY implementation=faulty passed=32 failed=3 total=35
EXIT_CODE=1

$ node test-discount.mjs correct
PASS ordinary exact | amount=1200 rate=20 expected=960 actual=960
PASS ordinary fraction | amount=1999 rate=15 expected=1699 actual=1699
PASS half-unit boundary | amount=101 rate=50 expected=51 actual=51
PASS below half-unit | amount=1 rate=51 expected=0 actual=0
PASS exact half-unit | amount=1 rate=50 expected=1 actual=1
PASS above half-unit | amount=1 rate=49 expected=1 actual=1
PASS zero amount | amount=0 rate=25 expected=0 actual=0
PASS zero discount | amount=101 rate=0 expected=101 actual=101
PASS full discount | amount=101 rate=100 expected=0 actual=0
PASS maximum amount | amount=1000000000 rate=0 expected=1000000000 actual=1000000000
PASS maximum amount discounted | amount=1000000000 rate=99 expected=10000000 actual=10000000
PASS maximum amount full discount | amount=1000000000 rate=100 expected=0 actual=0
PASS negative amount | amount=-1 rate=20 throws RangeError
PASS amount over cap | amount=1000000001 rate=20 throws RangeError
PASS fractional amount | amount=1.5 rate=20 throws TypeError
PASS blank amount | amount='' rate=20 throws TypeError
PASS numeric string amount | amount='101' rate=20 throws TypeError
PASS null amount | amount=null rate=20 throws TypeError
PASS missing amount | amount=undefined rate=20 throws TypeError
PASS boolean amount | amount=true rate=20 throws TypeError
PASS array amount | amount=[] rate=20 throws TypeError
PASS object amount | amount={} rate=20 throws TypeError
PASS NaN amount | amount=NaN rate=20 throws TypeError
PASS infinite amount | amount=Infinity rate=20 throws TypeError
PASS unsafe integer amount | amount=9007199254740992 rate=20 throws TypeError
PASS negative rate | amount=101 rate=-1 throws RangeError
PASS rate over cap | amount=101 rate=101 throws RangeError
PASS fractional rate | amount=101 rate=12.5 throws TypeError
PASS blank rate | amount=101 rate='' throws TypeError
PASS numeric string rate | amount=101 rate='50' throws TypeError
PASS missing rate | amount=101 rate=undefined throws TypeError
PASS NaN rate | amount=101 rate=NaN throws TypeError
PASS infinite rate | amount=101 rate=Infinity throws TypeError
PASS repeated calculation A B A | expected=[960,51,960] actual=[960,51,960]
PASS valid calculation after invalid input | rejected blank amount, then expected=960 actual=960
SUMMARY implementation=correct passed=35 failed=0 total=35
EXIT_CODE=0