feat: Introduce bot-descarga service for PDF downloads and remote bot control. Add Docker configuration, environment variables, and a GUI for agent management. Enhance README with bot details and installation instructions.

bots/bot_descarga/tests/test_pdf_validator.py

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+from __future__ import annotations
+
+import tempfile
+from pathlib import Path
+
+from bot_descarga.config.settings import Settings
+from bot_descarga.infrastructure.pdf_validator import PdfValidator
+
+
+def test_validate_rechaza_archivo_pequeno():
+    settings = Settings(peso_minimo_bytes=10_000)
+    validator = PdfValidator(settings)
+
+    with tempfile.TemporaryDirectory() as tmp:
+        path = Path(tmp) / "tiny.pdf"
+        path.write_bytes(b"%PDF-1.4\n%%EOF\n")
+        ok, motivo = validator.validate(str(path))
+
+    assert ok is False
+    assert "Peso insuficiente" in motivo
+
+
+def test_validate_rechaza_sin_firma_pdf():
+    settings = Settings(peso_minimo_bytes=10)
+    validator = PdfValidator(settings)
+
+    with tempfile.TemporaryDirectory() as tmp:
+        path = Path(tmp) / "fake.pdf"
+        path.write_bytes(b"NOTA PDF" + b"x" * 100)
+        ok, motivo = validator.validate(str(path))
+
+    assert ok is False
+    assert "firma" in motivo.lower()
+
+
+def test_validate_acepta_pdf_minimo_valido():
+    """PDF mínimo con firma, EOF y estructura pikepdf-compatible."""
+    import pikepdf
+
+    settings = Settings(peso_minimo_bytes=50)
+    validator = PdfValidator(settings)
+
+    with tempfile.TemporaryDirectory() as tmp:
+        path = Path(tmp) / "ok.pdf"
+        pdf = pikepdf.Pdf.new()
+        # Varias páginas para superar el peso mínimo sin corromper el archivo
+        for _ in range(5):
+            pdf.add_blank_page(page_size=(612, 792))
+        pdf.save(path)
+
+        ok, motivo = validator.validate(str(path))
+
+    assert ok is True, motivo
+    assert motivo == "OK"