feat: add custom email pool mail compatibility

tests/background-custom-email-pool.test.js

@@ -0,0 +1,104 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+
+const source = fs.readFileSync('background.js', 'utf8');
+
+function extractFunction(name) {
+  const markers = [`async function ${name}(`, `function ${name}(`];
+  const start = markers
+    .map((marker) => source.indexOf(marker))
+    .find((index) => index >= 0);
+  if (start < 0) {
+    throw new Error(`missing function ${name}`);
+  }
+
+  let parenDepth = 0;
+  let signatureEnded = false;
+  let braceStart = -1;
+  for (let i = start; i < source.length; i += 1) {
+    const ch = source[i];
+    if (ch === '(') {
+      parenDepth += 1;
+    } else if (ch === ')') {
+      parenDepth -= 1;
+      if (parenDepth === 0) {
+        signatureEnded = true;
+      }
+    } else if (ch === '{' && signatureEnded) {
+      braceStart = i;
+      break;
+    }
+  }
+  if (braceStart < 0) {
+    throw new Error(`missing body for function ${name}`);
+  }
+
+  let depth = 0;
+  let end = braceStart;
+  for (; end < source.length; end += 1) {
+    const ch = source[end];
+    if (ch === '{') depth += 1;
+    if (ch === '}') {
+      depth -= 1;
+      if (depth === 0) {
+        end += 1;
+        break;
+      }
+    }
+  }
+
+  return source.slice(start, end);
+}
+
+const bundle = [
+  extractFunction('normalizeEmailGenerator'),
+  extractFunction('normalizeCustomEmailPool'),
+  extractFunction('getCustomEmailPool'),
+  extractFunction('getCustomEmailPoolEmailForRun'),
+  extractFunction('getEmailGeneratorLabel'),
+].join('\n');
+
+function createApi() {
+  return new Function(`
+const CUSTOM_EMAIL_POOL_GENERATOR = 'custom-pool';
+const CLOUDFLARE_TEMP_EMAIL_GENERATOR = 'cloudflare-temp-email';
+
+${bundle}
+
+return {
+  normalizeEmailGenerator,
+  normalizeCustomEmailPool,
+  getCustomEmailPool,
+  getCustomEmailPoolEmailForRun,
+  getEmailGeneratorLabel,
+};
+`)();
+}
+
+test('background recognizes custom email pool generator and label', () => {
+  const api = createApi();
+
+  assert.equal(api.normalizeEmailGenerator('custom-pool'), 'custom-pool');
+  assert.equal(api.getEmailGeneratorLabel('custom-pool'), '自定义邮箱池');
+});
+
+test('background normalizes custom email pool input and keeps order', () => {
+  const api = createApi();
+
+  assert.deepEqual(
+    api.normalizeCustomEmailPool(' Foo@Example.com \ninvalid\nbar@example.com；baz@example.com '),
+    ['foo@example.com', 'bar@example.com', 'baz@example.com']
+  );
+});
+
+test('background selects the matching email for the current auto-run round', () => {
+  const api = createApi();
+  const state = {
+    customEmailPool: ['first@example.com', 'second@example.com', 'third@example.com'],
+  };
+
+  assert.equal(api.getCustomEmailPoolEmailForRun(state, 1), 'first@example.com');
+  assert.equal(api.getCustomEmailPoolEmailForRun(state, 2), 'second@example.com');
+  assert.equal(api.getCustomEmailPoolEmailForRun(state, 4), '');
+});