Add regression test for two_outputs example

Author: alexdewar

tests/data/two_outputs/assets.csv

@@ -0,0 +1,26 @@
+asset_id,process_id,region_id,agent_id,commission_year,decommission_year,capacity
+0,GASDRV,GBR,A0_OAG,2020,,4010.2
+1,OAGRSV,GBR,A0_OAG,2020,,1738.05
+2,GASPRC,GBR,A0_OAG,2020,,3789.64
+3,OILREF,GBR,A0_OAG,2020,2030,716.5
+4,OILRF2,GBR,A0_OAG,2020,2030,573.9
+5,WNDFRM,GBR,A0_ELC,2020,,3.964844
+6,GASCGT,GBR,A0_ELC,2020,,2.999
+7,TPETCR,GBR,A0_TRA,2020,2030,451.91
+8,TDIECR,GBR,A0_TRA,2020,2030,176.58
+9,TELCCR,GBR,A0_TRA,2020,2030,20.99
+10,THYBCR,GBR,A0_TRA,2020,2030,15.0
+11,RGASBR,GBR,A0_RES,2020,2035,2900.0
+12,RELCHP,GBR,A0_RES,2020,2035,399.98
+13,THYBCR,GBR,A0_TRA,2030,2040,777.3007440837425
+14,RBIOBL,GBR,A0_RES,2030,,355.83840587648046
+15,GASCGT,GBR,A0_ELC,2030,,23.3007739006231
+16,OILRF2,GBR,A0_REF,2030,,636.9547752299587
+17,BIOPLL,GBR,A0_BPL,2030,,449.480091633449
+18,BIOPRO,GBR,A0_BPD,2030,,448.35639140436535
+19,THYBCR,GBR,A0_TRA,2040,,912.8939641298439
+20,RBIOBL,GBR,A0_RES,2040,,3655.8189696
+21,GASCGT,GBR,A0_ELC,2040,,0.2844274500540588
+22,OILRF2,GBR,A0_REF,2040,,111.11111066666676
+23,BIOPLL,GBR,A0_BPL,2040,,2282.060105834934
+24,BIOPRO,GBR,A0_BPD,2040,,2276.354955570347