public void testFuzzyEqualsOneNaN() {
for (double a : DOUBLE_CANDIDATES_EXCEPT_NAN) {
for (double tolerance : TOLERANCE_CANDIDATES) {
assertFalse(DoubleMath.fuzzyEquals(a, Double.NaN, tolerance));
assertFalse(DoubleMath.fuzzyEquals(Double.NaN, a, tolerance));
}
}
}
public void testFuzzyInfiniteVersusInfiniteWithFiniteTolerance() {
for (double inf : INFINITIES) {
for (double tolerance : FINITE_TOLERANCE_CANDIDATES) {
assertTrue(DoubleMath.fuzzyEquals(inf, inf, tolerance));
assertFalse(DoubleMath.fuzzyEquals(inf, -inf, tolerance));
}
}
}
public void testFuzzyEqualsInfiniteTolerance() {
for (double a : DOUBLE_CANDIDATES_EXCEPT_NAN) {
for (double b : DOUBLE_CANDIDATES_EXCEPT_NAN) {
assertTrue(DoubleMath.fuzzyEquals(a, b, Double.POSITIVE_INFINITY));
}
}
}
public void testFuzzyEqualsFinite() {
for (double a : FINITE_DOUBLE_CANDIDATES) {
for (double b : FINITE_DOUBLE_CANDIDATES) {
for (double tolerance : FINITE_TOLERANCE_CANDIDATES) {
assertEquals(Math.abs(a - b) <= tolerance, DoubleMath.fuzzyEquals(a, b, tolerance));
}
}
}
}
public void testFuzzyEqualsBadTolerance() {
for (double tolerance : BAD_TOLERANCE_CANDIDATES) {
try {
DoubleMath.fuzzyEquals(1, 2, tolerance);
fail("Expected IllegalArgumentException");
} catch (IllegalArgumentException expected) {
// success
}
}
}
public void testFuzzyCompare() {
for (double a : ALL_DOUBLE_CANDIDATES) {
for (double b : ALL_DOUBLE_CANDIDATES) {
for (double tolerance : TOLERANCE_CANDIDATES) {
int expected = DoubleMath.fuzzyEquals(a, b, tolerance) ? 0 : Double.compare(a, b);
int actual = DoubleMath.fuzzyCompare(a, b, tolerance);
assertEquals(Integer.signum(expected), Integer.signum(actual));
}
}
}
}
public void testFuzzyEqualsZeroTolerance() {
// make sure we test -0 tolerance
for (double zero : Doubles.asList(0.0, -0.0)) {
for (double a : ALL_DOUBLE_CANDIDATES) {
for (double b : ALL_DOUBLE_CANDIDATES) {
assertEquals(
a == b || (Double.isNaN(a) && Double.isNaN(b)), DoubleMath.fuzzyEquals(a, b, zero));
}
}
}
}
public void testFuzzyEqualsTwoNaNs() {
for (double tolerance : TOLERANCE_CANDIDATES) {
assertTrue(DoubleMath.fuzzyEquals(Double.NaN, Double.NaN, tolerance));
}
}