not allowing naked erm be combined with fbopt

Author: smilesun

domainlab/algos/trainers/fbopt_mu_controller.py

@@ -45,6 +45,9 @@ def __init__(self, trainer, **kwargs):
         self.mu_min = trainer.aconf.mu_min
         self.mu_clip = trainer.aconf.mu_clip
 
+        if not kwargs:
+            raise RuntimeError("feedback scheduler requires **kwargs, the set \
+                               of multipliers non-empty")
         self.mmu = kwargs
         # force initial value of mu
         self.mmu = {key: self.init_mu for key, val in self.mmu.items()}

tests/test_fbopt.py

@@ -1,6 +1,7 @@
 """
 unit and end-end test for deep all, mldg
 """
+import pytest
 from tests.utils_test import utils_test_algo
 
 
@@ -27,13 +28,24 @@ def test_diva_fbopt():
     args = "--te_d=caltech --task=mini_vlcs --debug --bs=2 --model=diva --gamma_y=1.0 --trainer=fbopt --nname=alexnet --epos=3"
     utils_test_algo(args)
 
+
 def test_erm_fbopt():
     """
     erm
     """
     args = "--te_d=caltech --task=mini_vlcs --debug --bs=2 --model=erm --trainer=fbopt --nname=alexnet --epos=3" # pylint: disable=line-too-long
+    with pytest.raises(RuntimeError):
+        utils_test_algo(args)
+
+
+def test_irm_fbopt():
+    """
+    irm
+    """
+    args = "--te_d=caltech --task=mini_vlcs --debug --bs=2 --model=erm --trainer=fbopt_irm --nname=alexnet --epos=3" # pylint: disable=line-too-long
     utils_test_algo(args)
 
+
 def test_forcesetpoint_fbopt():
     """
     diva