Improved service handle validation logic (#7657)

* fix validation logic for 3p pdses

* fix bad import

* add service handle validation test

1 files changed, 42 insertions, 0 deletions

diff --git a/__tests__/lib/strings/handles.test.ts b/__tests__/lib/strings/handles.test.ts
new file mode 100644
index 000000000..4456fae94
--- /dev/null
+++ b/__tests__/lib/strings/handles.test.ts
@@ -0,0 +1,42 @@
+import {IsValidHandle, validateServiceHandle} from '#/lib/strings/handles'
+
+describe('handle validation', () => {
+  const valid = [
+    ['ali', 'bsky.social'],
+    ['alice', 'bsky.social'],
+    ['a-lice', 'bsky.social'],
+    ['a-----lice', 'bsky.social'],
+    ['123', 'bsky.social'],
+    ['123456789012345678', 'bsky.social'],
+    ['alice', 'custom-pds.com'],
+    ['alice', 'my-custom-pds-with-long-name.social'],
+    ['123456789012345678', 'my-custom-pds-with-long-name.social'],
+  ]
+  it.each(valid)(`should be valid: %s.%s`, (handle, service) => {
+    const result = validateServiceHandle(handle, service)
+    expect(result.overall).toEqual(true)
+  })
+
+  const invalid = [
+    ['al', 'bsky.social', 'frontLength'],
+    ['-alice', 'bsky.social', 'hyphenStartOrEnd'],
+    ['alice-', 'bsky.social', 'hyphenStartOrEnd'],
+    ['%%%', 'bsky.social', 'handleChars'],
+    ['1234567890123456789', 'bsky.social', 'frontLength'],
+    [
+      '1234567890123456789',
+      'my-custom-pds-with-long-name.social',
+      'frontLength',
+    ],
+    ['al', 'my-custom-pds-with-long-name.social', 'frontLength'],
+    ['a'.repeat(300), 'toolong.com', 'totalLength'],
+  ] satisfies [string, string, keyof IsValidHandle][]
+  it.each(invalid)(
+    `should be invalid: %s.%s due to %s`,
+    (handle, service, expectedError) => {
+      const result = validateServiceHandle(handle, service)
+      expect(result.overall).toEqual(false)
+      expect(result[expectedError]).toEqual(false)
+    },
+  )
+})