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Monorepo for Tangled
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354package email
import ( "testing")
func TestIsValidEmail(t *testing.T) { tests := []struct { name string email string want bool }{ // Valid emails using RFC 2606 reserved domains {"standard email", "user@example.com", true}, {"single char local", "a@example.com", true}, {"dot in middle", "first.last@example.com", true}, {"multiple dots", "a.b.c@example.com", true}, {"plus tag", "user+tag@example.com", true}, {"numbers", "user123@example.com", true}, {"example.org", "user@example.org", true}, {"example.net", "user@example.net", true},
// Invalid format - rejected by mail.ParseAddress {"empty string", "", false}, {"no at sign", "userexample.com", false}, {"no domain", "user@", false}, {"no local part", "@example.com", false}, {"double at", "user@@example.com", false}, {"just at sign", "@", false}, {"leading dot", ".user@example.com", false}, {"trailing dot", "user.@example.com", false}, {"consecutive dots", "user..name@example.com", false},
// Whitespace - rejected before parsing {"space in local", "user @example.com", false}, {"space in domain", "user@ example.com", false}, {"tab", "user\t@example.com", false}, {"newline", "user\n@example.com", false},
// MX lookup - using RFC 2606 reserved TLDs (guaranteed no MX) {"invalid TLD", "user@example.invalid", false}, {"test TLD", "user@mail.test", false}, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got := IsValidEmail(tt.email) if got != tt.want { t.Errorf("IsValidEmail(%q) = %v, want %v", tt.email, got, tt.want) } }) }}