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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| // String+Email.swift | ||
| // Email validation extensions for String | ||
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| import Foundation | ||
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| extension String { | ||
| /// Validates if the string is a valid email address format according to RFC 5322 | ||
| /// - Returns: True if the string matches email format | ||
| public func isValidEmail() -> Bool { | ||
| let pattern = #""" | ||
| ^(?:[a-zA-Z0-9](?:[a-zA-Z0-9._%+-]{0,61}[a-zA-Z0-9])?@ | ||
| [a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])? | ||
| (?:\.[a-zA-Z]{2,})+)$ | ||
| """# | ||
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||
| do { | ||
| let regex = try NSRegularExpression(pattern: pattern, options: [.allowCommentsAndWhitespace]) | ||
| let range = NSRange(location: 0, length: self.utf16.count) | ||
| return regex.firstMatch(in: self, options: [], range: range) != nil | ||
| } catch { | ||
| // If regex creation fails (which shouldn't happen with a valid pattern), | ||
| // fall back to a very basic check | ||
| return self.contains("@") && | ||
| self.split(separator: "@").count == 2 && | ||
| !self.hasPrefix("@") && | ||
| !self.hasSuffix("@") | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // String+EmailTests.swift | ||
| // Tests for email validation String extension | ||
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| import XCTest | ||
| @testable import SwiftMailCore | ||
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| final class StringEmailTests: XCTestCase { | ||
| func testValidEmails() { | ||
| // Test basic valid formats | ||
| XCTAssertTrue("user@example.com".isValidEmail()) | ||
| XCTAssertTrue("user.name@example.com".isValidEmail()) | ||
| XCTAssertTrue("user+tag@example.com".isValidEmail()) | ||
| XCTAssertTrue("user@subdomain.example.com".isValidEmail()) | ||
| XCTAssertTrue("123@example.com".isValidEmail()) | ||
| XCTAssertTrue("user@example.co.uk".isValidEmail()) | ||
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| // Test edge cases that should be valid | ||
| XCTAssertTrue("a@b.cc".isValidEmail()) // Minimal length | ||
| XCTAssertTrue("disposable.style.email.with+symbol@example.com".isValidEmail()) | ||
| XCTAssertTrue("other.email-with-hyphen@example.com".isValidEmail()) | ||
| XCTAssertTrue("fully-qualified-domain@example.com".isValidEmail()) | ||
| XCTAssertTrue("user.name+tag+sorting@example.com".isValidEmail()) | ||
| XCTAssertTrue("x@example.com".isValidEmail()) // One-letter local-part | ||
| XCTAssertTrue("example-indeed@strange-example.com".isValidEmail()) | ||
| XCTAssertTrue("example@s.example".isValidEmail()) // Short but valid domain | ||
| } | ||
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| func testInvalidEmails() { | ||
| // Test basic invalid formats | ||
| XCTAssertFalse("".isValidEmail()) | ||
| XCTAssertFalse("@example.com".isValidEmail()) | ||
| XCTAssertFalse("user@".isValidEmail()) | ||
| XCTAssertFalse("user@.com".isValidEmail()) | ||
| XCTAssertFalse("user@example".isValidEmail()) | ||
| XCTAssertFalse("user.example.com".isValidEmail()) | ||
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| // Test invalid characters and formats | ||
| XCTAssertFalse("user@exam ple.com".isValidEmail()) // Space in domain | ||
| XCTAssertFalse("user@@example.com".isValidEmail()) // Double @ | ||
| XCTAssertFalse(".user@example.com".isValidEmail()) // Leading dot | ||
| XCTAssertFalse("user.@example.com".isValidEmail()) // Trailing dot | ||
| XCTAssertFalse("user@example..com".isValidEmail()) // Double dot | ||
| XCTAssertFalse("user@-example.com".isValidEmail()) // Leading hyphen in domain | ||
| XCTAssertFalse("user@example-.com".isValidEmail()) // Trailing hyphen in domain | ||
| XCTAssertFalse("user@.example.com".isValidEmail()) // Leading dot in domain | ||
| XCTAssertFalse("user@example.".isValidEmail()) // Trailing dot in domain | ||
| XCTAssertFalse("user@ex*ample.com".isValidEmail()) // Invalid character | ||
| XCTAssertFalse("user@example.c".isValidEmail()) // TLD too short | ||
| XCTAssertFalse("user name@example.com".isValidEmail()) // Space in local part | ||
| } | ||
| } |