assertInstanceOf(Element\Identifier::class, $superscript->getBase()); $this->assertInstanceOf(Element\Identifier::class, $superscript->getSuperscript()); } public function testBase(): void { $identifierA = new Element\Identifier('a'); $identifierB = new Element\Identifier('b'); $identifierC = new Element\Identifier('c'); $superscript = new Superscript($identifierA, $identifierB); $this->assertEquals($identifierA, $superscript->getBase()); $this->assertInstanceOf(Superscript::class, $superscript->setBase($identifierC)); $this->assertEquals($identifierC, $superscript->getBase()); } public function testSuperscript(): void { $identifierA = new Element\Identifier('a'); $identifierB = new Element\Identifier('b'); $identifierC = new Element\Identifier('c'); $superscript = new Superscript($identifierA, $identifierB); $this->assertEquals($identifierB, $superscript->getSuperscript()); $this->assertInstanceOf(Superscript::class, $superscript->setSuperscript($identifierC)); $this->assertEquals($identifierC, $superscript->getSuperscript()); } }