handoff fixes

backend/tests/test_handoff_mirror.py

@@ -0,0 +1,85 @@
+from app.services.handoff_email_templates import (
+    build_mirror_handoff_html,
+    build_mirror_handoff_text,
+    external_reply_subject,
+    format_sender_line,
+    handoff_email_subject,
+)
+from app.services.html_sanitizer import sanitize_email_html
+from app.services.mime_body_extractor import extract_mirror_content
+from app.services.thread_service import threading_fields_from_parent
+
+
+def test_mirror_template_is_minimal():
+    html = build_mirror_handoff_html(
+        sender_line="091rabbytes@gmail.com",
+        external_subject="lets try one more time",
+        original_html="<p>one last attempt. i am tired</p>",
+        agent_email="suyash@gentic.email",
+    )
+    assert "LATEST MESSAGE" not in html
+    assert "Why you" not in html
+    assert "gentic-handoff-original" in html
+    assert "one last attempt. i am tired" in html
+    assert "✦ Human Handoff" in html
+    assert "091rabbytes@gmail.com" in html
+    assert "lets try one more time" in html
+
+
+def test_mirror_plain_text_template():
+    text = build_mirror_handoff_text(
+        sender_line="091rabbytes@gmail.com",
+        external_subject="lets try one more time",
+        original_body_text="one last attempt. i am tired",
+        agent_email="suyash@gentic.email",
+    )
+    assert "one last attempt. i am tired" in text
+    assert "LATEST MESSAGE" not in text
+    assert "Reply normally" in text
+
+
+def test_format_sender_with_name():
+    assert (
+        format_sender_line({"name": "Rahul Sharma", "address": "rahul@example.com"})
+        == "Rahul Sharma <rahul@example.com>"
+    )
+
+
+def test_external_threading_headers_from_customer_message():
+    parent = {
+        "_id": "mongo-id",
+        "message_id": "<a@gmail.com>",
+        "references": [],
+    }
+    threading = threading_fields_from_parent(parent)
+    assert threading["in_reply_to"] == "<a@gmail.com>"
+    assert threading["references"] == ["<a@gmail.com>"]
+
+
+def test_external_reply_subject_uses_customer_subject():
+    assert external_reply_subject("lets try one more time") == "Re: lets try one more time"
+    assert handoff_email_subject("lets try one more time") == "Human Handoff · lets try one more time"
+
+
+def test_sanitize_removes_script():
+    dirty = '<p>Hello</p><script>alert(1)</script><img src="x" onerror="alert(1)">'
+    clean = sanitize_email_html(dirty)
+    assert "<script" not in clean.lower()
+    assert "onerror" not in clean.lower()
+    assert "Hello" in clean
+
+
+def test_extract_html_from_multipart():
+    raw = (
+        b"From: sender@example.com\r\n"
+        b"To: agent@gentic.email\r\n"
+        b"Subject: Invoice approval\r\n"
+        b'MIME-Version: 1.0\r\nContent-Type: multipart/alternative; boundary="b"\r\n\r\n'
+        b"--b\r\nContent-Type: text/plain; charset=utf-8\r\n\r\nPlain fallback\r\n"
+        b"--b\r\nContent-Type: text/html; charset=utf-8\r\n\r\n"
+        b"<h2>Invoice</h2><table><tr><td>Amount</td></tr></table>\r\n"
+        b"--b--\r\n"
+    )
+    extracted = extract_mirror_content(raw)
+    assert "Invoice" in (extracted.body_html or "")
+    assert "<table>" in (extracted.body_html or "")