add telemetry chart discovery and unit display

tests/html/test_chart_groups.py

@@ -0,0 +1,49 @@
+"""Tests for chart group building, including telemetry grouping behavior."""
+
+from __future__ import annotations
+
+import meshmon.html as html
+
+
+def test_repeater_appends_telemetry_group_when_enabled(configured_env, monkeypatch):
+    """Repeater chart groups append telemetry section when enabled and available."""
+    monkeypatch.setenv("TELEMETRY_ENABLED", "1")
+    import meshmon.env
+    meshmon.env._config = None
+
+    monkeypatch.setattr(html, "_load_svg_content", lambda path: "<svg></svg>")
+
+    chart_stats = {
+        "bat": {"day": {"min": 3.5, "avg": 3.7, "max": 3.9, "current": 3.8}},
+        "telemetry.temperature.1": {"day": {"min": 5.0, "avg": 6.0, "max": 7.0, "current": 6.5}},
+        "telemetry.humidity.1": {"day": {"min": 82.0, "avg": 84.0, "max": 86.0, "current": 85.0}},
+        "telemetry.voltage.1": {"day": {"min": 3.9, "avg": 4.0, "max": 4.1, "current": 4.0}},
+        "telemetry.gps.0.latitude": {"day": {"min": 52.1, "avg": 52.2, "max": 52.3, "current": 52.25}},
+    }
+
+    groups = html.build_chart_groups("repeater", "day", chart_stats)
+
+    assert groups[-1]["title"] == "Telemetry"
+    telemetry_metrics = [chart["metric"] for chart in groups[-1]["charts"]]
+    assert "telemetry.temperature.1" in telemetry_metrics
+    assert "telemetry.humidity.1" in telemetry_metrics
+    assert "telemetry.voltage.1" not in telemetry_metrics
+    assert "telemetry.gps.0.latitude" not in telemetry_metrics
+
+
+def test_repeater_has_no_telemetry_group_when_disabled(configured_env, monkeypatch):
+    """Repeater chart groups do not include telemetry section when disabled."""
+    monkeypatch.setenv("TELEMETRY_ENABLED", "0")
+    import meshmon.env
+    meshmon.env._config = None
+
+    monkeypatch.setattr(html, "_load_svg_content", lambda path: "<svg></svg>")
+
+    chart_stats = {
+        "bat": {"day": {"min": 3.5, "avg": 3.7, "max": 3.9, "current": 3.8}},
+        "telemetry.temperature.1": {"day": {"min": 5.0, "avg": 6.0, "max": 7.0, "current": 6.5}},
+    }
+
+    groups = html.build_chart_groups("repeater", "day", chart_stats)
+
+    assert "Telemetry" not in [group["title"] for group in groups]