Add test correction (#131)

* Add test correction

* Update test_correction.py

xedocs/schemas/corrections/implementations/__init__.py

@@ -25,3 +25,4 @@
 from .z_bias import *
 from .cs2_aft_corrections import *
 from .se_gain_partition import *
+from .test_correction import *

xedocs/schemas/corrections/implementations/test_correction.py

@@ -0,0 +1,18 @@
+# This will be a correction designed for testing purposes.
+# This SHOULD NOT be used in production.
+
+import rframe
+
+from ..base_corrections import TimeSampledCorrection
+from ...constants import DETECTOR
+
+class TestCorrection(TimeSampledCorrection):
+    _ALIAS = "test_corrections"
+
+    # Correction identical to PMT gains.
+    # Used for testing
+
+    detector: DETECTOR = rframe.Index()
+    pmt: int = rframe.Index(ge=0)
+
+    value: float