public function testComparators() { $m1 = new Money(0, new Currency('BRL')); $m2 = new Money(-1, new Currency('BRL')); $m3 = new Money(1, new Currency('BRL')); $m4 = new Money(1, new Currency('BRL')); $m5 = new Money(1, new Currency('BRL')); $m6 = new Money(-1, new Currency('BRL')); $this->assertTrue($m1->isZero()); $this->assertTrue($m2->isNegative()); $this->assertTrue($m3->isPositive()); $this->assertFalse($m4->isZero()); $this->assertFalse($m5->isNegative()); $this->assertFalse($m6->isPositive()); }