assertEmpty($readline->listHistory()); $readline->addHistory('foo'); $this->assertSame(['foo'], $readline->listHistory()); $readline->addHistory('bar'); $this->assertSame(['foo', 'bar'], $readline->listHistory()); $readline->addHistory('baz'); $this->assertSame(['foo', 'bar', 'baz'], $readline->listHistory()); $readline->clearHistory(); $this->assertEmpty($readline->listHistory()); } }