package auth import ( "testing" "github.com/stretchr/testify/assert" ) func TestGetShortUserName(t *testing.T) { tests := []struct { name string email string expected string }{ { email: "test.user.1234@example.com", expected: "test_user_1234", }, { email: "tést.üser@example.com", expected: "tést_üser", }, { email: "test$.user@example.com", expected: "test__user", }, { email: `jöhn.dœ@domain.com`, // Using non-ASCII characters. expected: "jöhn_dœ", }, { email: `first+tag@email.com`, // The plus (+) sign is used for "sub-addressing" in some email services. expected: "first_tag", }, { email: `email@sub.domain.com`, // Using a sub-domain. expected: "email", }, { email: `"_quoted"@domain.com`, // Quoted strings can be part of the local-part. expected: "__quoted_", }, { email: `name-o'mally@website.org`, // Single quote in the local-part. expected: "name_o_mally", }, { email: `user%domain@external.com`, // Percent sign can be used for email routing in legacy systems. expected: "user_domain", }, { email: `long.name.with.dots@domain.net`, // Multiple dots in the local-part. expected: "long_name_with_dots", }, { email: `me&you@together.com`, // Using an ampersand (&) in the local-part. expected: "me_you", }, { email: `user!def!xyz@domain.org`, // The exclamation mark can be valid in some legacy systems. expected: "user_def_xyz", }, { email: `admin@ιντερνετ.com`, // Domain in non-ASCII characters (IDN or Internationalized Domain Name). expected: "admin", }, } for _, tt := range tests { assert.Equal(t, tt.expected, GetShortUserName(tt.email)) } }