feat: implement CNN Fear & Greed Index collector

1 files changed, 49 insertions, 0 deletions

diff --git a/services/news-collector/tests/test_fear_greed.py b/services/news-collector/tests/test_fear_greed.py
new file mode 100644
index 0000000..d483aa6
--- /dev/null
+++ b/services/news-collector/tests/test_fear_greed.py
@@ -0,0 +1,49 @@
+"""Tests for CNN Fear & Greed Index collector."""
+
+import pytest
+from unittest.mock import AsyncMock, patch
+
+from news_collector.collectors.fear_greed import FearGreedCollector
+
+
+@pytest.fixture
+def collector():
+    return FearGreedCollector()
+
+
+def test_collector_name(collector):
+    assert collector.name == "fear_greed"
+    assert collector.poll_interval == 3600
+
+
+async def test_is_available(collector):
+    assert await collector.is_available() is True
+
+
+async def test_collect_parses_api_response(collector):
+    mock_data = {
+        "fear_and_greed": {
+            "score": 45.0,
+            "rating": "Fear",
+            "timestamp": "2026-04-02T12:00:00+00:00",
+        }
+    }
+    with patch.object(collector, "_fetch_index", new_callable=AsyncMock, return_value=mock_data):
+        result = await collector.collect()
+    assert result.fear_greed == 45
+    assert result.fear_greed_label == "Fear"
+
+
+async def test_collect_returns_none_on_failure(collector):
+    with patch.object(collector, "_fetch_index", new_callable=AsyncMock, return_value=None):
+        result = await collector.collect()
+    assert result is None
+
+
+def test_classify_label():
+    c = FearGreedCollector()
+    assert c._classify(10) == "Extreme Fear"
+    assert c._classify(30) == "Fear"
+    assert c._classify(50) == "Neutral"
+    assert c._classify(70) == "Greed"
+    assert c._classify(85) == "Extreme Greed"