add test for ID_HC and ID_surtax consistency

taxcalc/tests/test_calculate.py

@@ -298,6 +298,37 @@ def test_calculate_mtr():
     assert np.array_equal(mtr_FICA, mtr_IIT) == False
 
 
+def test_ID_hc_vs_surtax():
+    policy1 = Policy()
+    puf1 = Records(TAX_DTA, weights=WEIGHTS, start_year=2009)
+    calc1 = Calculator(policy=policy1, records=puf1)
+
+    policy2 = Policy()
+    puf2 = Records(TAX_DTA, weights=WEIGHTS, start_year=2009)
+    calc2 = Calculator(policy=policy2, records=puf2)
+
+    reform1 = {2013: {'_ID_Medical_HC': [1],
+                      '_ID_StateLocalTax_HC': [1],
+                      '_ID_RealEstate_HC': [1],
+                      '_ID_Casualty_HC': [1],
+                      '_ID_Miscellaneous_HC': [1],
+                      '_ID_InterestPaid_HC': [1],
+                      '_ID_Charity_HC': [1]
+                      }
+               }
+    reform2 = {2013: {'_ID_BenefitSurtax_crt': [0]
+                      }
+               }
+
+    policy1.implement_reform(reform1)
+    policy2.implement_reform(reform2)
+
+    calc1.calc_all()
+    calc2.calc_all()
+
+    assert_array_equal(calc1.records._combined, calc2.records._combined)
+
+
 def test_Calculator_create_difference_table():
     # create current-law Policy object and use to create Calculator calc1
     policy1 = Policy()