--- /dev/null
+<?php
+namespace Drush\SiteAlias;
+
+use PHPUnit\Framework\TestCase;
+
+class SiteAliasNameTest extends TestCase
+{
+ public function testSiteAliasName()
+ {
+ // Test an ambiguous sitename or env alias.
+ $name = SiteAliasName::parse('@simple');
+ $this->assertFalse($name->hasSitename());
+ $this->assertTrue($name->hasEnv());
+ $this->assertEquals('simple', $name->env());
+ $this->assertEquals('@self.simple', (string)$name);
+
+ // Test a non-ambiguous sitename.env alias.
+ $name = SiteAliasName::parse('@site.env');
+ $this->assertTrue($name->hasSitename());
+ $this->assertTrue($name->hasEnv());
+ $this->assertEquals('site', $name->sitename());
+ $this->assertEquals('env', $name->env());
+ $this->assertEquals('@site.env', (string)$name);
+
+ // Test an invalid alias
+ $name = SiteAliasName::parse('!site.env');
+ $this->assertFalse($name->hasSitename());
+ $this->assertFalse($name->hasEnv());
+ }
+}