TDD Kata - 99 Bottles of Beer on the Wall

The Rules
Write a function that takes in an integer number and displays the proper verse from the song “99 Bottles of Beer on the Wall”.

Most lyrics fit this format:

99 bottles of beer on the wall,\n
99 bottles of beer.\n
Take one down and pass it around,\n
98 bottles of beer on the wall.\n

There are a few exceptions:
6 bottles of beer are called 1 six-pack

From 2 to 1 bottles, the plural has to be correct:

1 bottle of beer on the wall.\n

The final lyric is as follows:

1 bottle of beer on the wall,\n
1 bottle of beer.\n
Take it down and pass it around,\n
no more bottles of beer on the wall.\n

Starting API

fun verse(number: Int): String

First Test

@Test
fun `base case lyrics 99 bottles`() = runTest {
    val expected = """99 bottles of beer on the wall,
        |99 bottles of beer.
        |Take one down and pass it around
        |98 bottles of beer on the wall.
        |""".trimMargin()
    assertEquals(expected, verse(99))
}