/** * @covers Marando\Meeus\Nutation\Nutation::trueObliquity * @see p.148, ex. 22.a */ public function testTrueObliquity() { $ε = Nutation::trueObliquity(AstroDate::parse('1987-Apr-10')); $this->assertEquals(23, $ε->d, 'd'); $this->assertEquals(26, $ε->m, 'm'); $this->assertEquals(36.85, $ε->s, 's', 0.01); }