[
  {
    "name": "a dairy ration for 100 cows over 30 days: the group cost is 467.5p x 3000 exactly, not 468p x 3000",
    "args": [
      [
        {
          "name": "grass silage",
          "freshKgPerHead": 40,
          "dryMatterBasisPoints": 3000,
          "pricePerTonne": {
            "minor": 4000,
            "currency": "GBP"
          }
        },
        {
          "name": "maize silage",
          "freshKgPerHead": 15,
          "dryMatterBasisPoints": 3200,
          "pricePerTonne": {
            "minor": 4500,
            "currency": "GBP"
          }
        },
        {
          "name": "dairy compound",
          "freshKgPerHead": 8,
          "dryMatterBasisPoints": 8800,
          "pricePerTonne": {
            "minor": 30000,
            "currency": "GBP"
          }
        }
      ],
      100,
      30,
      "GBP"
    ],
    "expect": {
      "lines": [
        {
          "name": "grass silage",
          "freshKgPerHead": 40,
          "dryMatterKgPerHead": 12,
          "costPerHead": {
            "minor": 160,
            "currency": "GBP"
          }
        },
        {
          "name": "maize silage",
          "freshKgPerHead": 15,
          "dryMatterKgPerHead": 4.8,
          "costPerHead": {
            "minor": 68,
            "currency": "GBP"
          }
        },
        {
          "name": "dairy compound",
          "freshKgPerHead": 8,
          "dryMatterKgPerHead": 7.04,
          "costPerHead": {
            "minor": 240,
            "currency": "GBP"
          }
        }
      ],
      "freshKgPerHead": 63,
      "dryMatterKgPerHead": 23.84,
      "dryMatterBasisPoints": 3784,
      "costPerHeadPerDay": {
        "minor": 468,
        "currency": "GBP"
      },
      "totalCost": {
        "minor": 1402500,
        "currency": "GBP"
      },
      "costPerTonneDryMatter": {
        "minor": 19610,
        "currency": "GBP"
      }
    }
  },
  {
    "name": "the same ration for one cow for one day",
    "args": [
      [
        {
          "name": "grass silage",
          "freshKgPerHead": 40,
          "dryMatterBasisPoints": 3000,
          "pricePerTonne": {
            "minor": 4000,
            "currency": "GBP"
          }
        },
        {
          "name": "maize silage",
          "freshKgPerHead": 15,
          "dryMatterBasisPoints": 3200,
          "pricePerTonne": {
            "minor": 4500,
            "currency": "GBP"
          }
        },
        {
          "name": "dairy compound",
          "freshKgPerHead": 8,
          "dryMatterBasisPoints": 8800,
          "pricePerTonne": {
            "minor": 30000,
            "currency": "GBP"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expect": {
      "lines": [
        {
          "name": "grass silage",
          "freshKgPerHead": 40,
          "dryMatterKgPerHead": 12,
          "costPerHead": {
            "minor": 160,
            "currency": "GBP"
          }
        },
        {
          "name": "maize silage",
          "freshKgPerHead": 15,
          "dryMatterKgPerHead": 4.8,
          "costPerHead": {
            "minor": 68,
            "currency": "GBP"
          }
        },
        {
          "name": "dairy compound",
          "freshKgPerHead": 8,
          "dryMatterKgPerHead": 7.04,
          "costPerHead": {
            "minor": 240,
            "currency": "GBP"
          }
        }
      ],
      "freshKgPerHead": 63,
      "dryMatterKgPerHead": 23.84,
      "dryMatterBasisPoints": 3784,
      "costPerHeadPerDay": {
        "minor": 468,
        "currency": "GBP"
      },
      "totalCost": {
        "minor": 468,
        "currency": "GBP"
      },
      "costPerTonneDryMatter": {
        "minor": 19610,
        "currency": "GBP"
      }
    }
  },
  {
    "name": "hay alone: 10 kg at 85% DM and £120/t is £1.20 a day and £141.18 a tonne of DM",
    "args": [
      [
        {
          "name": "hay",
          "freshKgPerHead": 10,
          "dryMatterBasisPoints": 8500,
          "pricePerTonne": {
            "minor": 12000,
            "currency": "GBP"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expect": {
      "lines": [
        {
          "name": "hay",
          "freshKgPerHead": 10,
          "dryMatterKgPerHead": 8.5,
          "costPerHead": {
            "minor": 120,
            "currency": "GBP"
          }
        }
      ],
      "freshKgPerHead": 10,
      "dryMatterKgPerHead": 8.5,
      "dryMatterBasisPoints": 8500,
      "costPerHeadPerDay": {
        "minor": 120,
        "currency": "GBP"
      },
      "totalCost": {
        "minor": 120,
        "currency": "GBP"
      },
      "costPerTonneDryMatter": {
        "minor": 14118,
        "currency": "GBP"
      }
    }
  },
  {
    "name": "a sheep flock on a small concentrate allowance, 0.45 kg at £280/t",
    "args": [
      [
        {
          "name": "ewe nuts",
          "freshKgPerHead": 0.45,
          "dryMatterBasisPoints": 8700,
          "pricePerTonne": {
            "minor": 28000,
            "currency": "GBP"
          }
        }
      ],
      400,
      42,
      "GBP"
    ],
    "expect": {
      "lines": [
        {
          "name": "ewe nuts",
          "freshKgPerHead": 0.45,
          "dryMatterKgPerHead": 0.392,
          "costPerHead": {
            "minor": 13,
            "currency": "GBP"
          }
        }
      ],
      "freshKgPerHead": 0.45,
      "dryMatterKgPerHead": 0.392,
      "dryMatterBasisPoints": 8700,
      "costPerHeadPerDay": {
        "minor": 13,
        "currency": "GBP"
      },
      "totalCost": {
        "minor": 211680,
        "currency": "GBP"
      },
      "costPerTonneDryMatter": {
        "minor": 32184,
        "currency": "GBP"
      }
    }
  },
  {
    "name": "fresh weights are taken to the gram",
    "args": [
      [
        {
          "name": "hay",
          "freshKgPerHead": 2.0004,
          "dryMatterBasisPoints": 8500,
          "pricePerTonne": {
            "minor": 12000,
            "currency": "GBP"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expect": {
      "lines": [
        {
          "name": "hay",
          "freshKgPerHead": 2,
          "dryMatterKgPerHead": 1.7,
          "costPerHead": {
            "minor": 24,
            "currency": "GBP"
          }
        }
      ],
      "freshKgPerHead": 2,
      "dryMatterKgPerHead": 1.7,
      "dryMatterBasisPoints": 8500,
      "costPerHeadPerDay": {
        "minor": 24,
        "currency": "GBP"
      },
      "totalCost": {
        "minor": 24,
        "currency": "GBP"
      },
      "costPerTonneDryMatter": {
        "minor": 14118,
        "currency": "GBP"
      }
    }
  },
  {
    "name": "water: fresh weight but no dry matter and no cost",
    "args": [
      [
        {
          "name": "water",
          "freshKgPerHead": 60,
          "dryMatterBasisPoints": 0,
          "pricePerTonne": {
            "minor": 0,
            "currency": "GBP"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expect": {
      "lines": [
        {
          "name": "water",
          "freshKgPerHead": 60,
          "dryMatterKgPerHead": 0,
          "costPerHead": {
            "minor": 0,
            "currency": "GBP"
          }
        }
      ],
      "freshKgPerHead": 60,
      "dryMatterKgPerHead": 0,
      "dryMatterBasisPoints": 0,
      "costPerHeadPerDay": {
        "minor": 0,
        "currency": "GBP"
      },
      "totalCost": {
        "minor": 0,
        "currency": "GBP"
      },
      "costPerTonneDryMatter": null
    }
  },
  {
    "name": "no feeds is zero, with no DM share or cost per tonne of DM",
    "args": [
      [],
      10,
      7,
      "EUR"
    ],
    "expect": {
      "lines": [],
      "freshKgPerHead": 0,
      "dryMatterKgPerHead": 0,
      "dryMatterBasisPoints": null,
      "costPerHeadPerDay": {
        "minor": 0,
        "currency": "EUR"
      },
      "totalCost": {
        "minor": 0,
        "currency": "EUR"
      },
      "costPerTonneDryMatter": null
    }
  },
  {
    "name": "a line under half a penny rounds to zero but still counts in the total",
    "args": [
      [
        {
          "name": "minerals",
          "freshKgPerHead": 0.1,
          "dryMatterBasisPoints": 9500,
          "pricePerTonne": {
            "minor": 4000,
            "currency": "GBP"
          }
        }
      ],
      1000,
      1,
      "GBP"
    ],
    "expect": {
      "lines": [
        {
          "name": "minerals",
          "freshKgPerHead": 0.1,
          "dryMatterKgPerHead": 0.095,
          "costPerHead": {
            "minor": 0,
            "currency": "GBP"
          }
        }
      ],
      "freshKgPerHead": 0.1,
      "dryMatterKgPerHead": 0.095,
      "dryMatterBasisPoints": 9500,
      "costPerHeadPerDay": {
        "minor": 0,
        "currency": "GBP"
      },
      "totalCost": {
        "minor": 400,
        "currency": "GBP"
      },
      "costPerTonneDryMatter": {
        "minor": 4211,
        "currency": "GBP"
      }
    }
  },
  {
    "name": "zero head is an error",
    "args": [
      [
        {
          "name": "grass silage",
          "freshKgPerHead": 40,
          "dryMatterBasisPoints": 3000,
          "pricePerTonne": {
            "minor": 4000,
            "currency": "GBP"
          }
        },
        {
          "name": "maize silage",
          "freshKgPerHead": 15,
          "dryMatterBasisPoints": 3200,
          "pricePerTonne": {
            "minor": 4500,
            "currency": "GBP"
          }
        },
        {
          "name": "dairy compound",
          "freshKgPerHead": 8,
          "dryMatterBasisPoints": 8800,
          "pricePerTonne": {
            "minor": 30000,
            "currency": "GBP"
          }
        }
      ],
      0,
      1,
      "GBP"
    ],
    "expectError": "head must be a whole number from 1 to 1000000"
  },
  {
    "name": "a fractional day is an error",
    "args": [
      [
        {
          "name": "grass silage",
          "freshKgPerHead": 40,
          "dryMatterBasisPoints": 3000,
          "pricePerTonne": {
            "minor": 4000,
            "currency": "GBP"
          }
        },
        {
          "name": "maize silage",
          "freshKgPerHead": 15,
          "dryMatterBasisPoints": 3200,
          "pricePerTonne": {
            "minor": 4500,
            "currency": "GBP"
          }
        },
        {
          "name": "dairy compound",
          "freshKgPerHead": 8,
          "dryMatterBasisPoints": 8800,
          "pricePerTonne": {
            "minor": 30000,
            "currency": "GBP"
          }
        }
      ],
      1,
      1.5,
      "GBP"
    ],
    "expectError": "days must be a whole number from 1 to 3660"
  },
  {
    "name": "DM over 100% is an error",
    "args": [
      [
        {
          "name": "hay",
          "freshKgPerHead": 10,
          "dryMatterBasisPoints": 10001,
          "pricePerTonne": {
            "minor": 12000,
            "currency": "GBP"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expectError": "feed 1: dryMatterBasisPoints must be a whole number from 0 to 10000"
  },
  {
    "name": "a DM percentage given as a fraction is an error",
    "args": [
      [
        {
          "name": "hay",
          "freshKgPerHead": 10,
          "dryMatterBasisPoints": 85.5,
          "pricePerTonne": {
            "minor": 12000,
            "currency": "GBP"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expectError": "feed 1: dryMatterBasisPoints must be a whole number from 0 to 10000"
  },
  {
    "name": "a negative fresh weight is an error",
    "args": [
      [
        {
          "name": "hay",
          "freshKgPerHead": -1,
          "dryMatterBasisPoints": 8500,
          "pricePerTonne": {
            "minor": 12000,
            "currency": "GBP"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expectError": "feed 1: freshKgPerHead must be a finite number from 0 to 1000"
  },
  {
    "name": "a negative price is an error",
    "args": [
      [
        {
          "name": "hay",
          "freshKgPerHead": 10,
          "dryMatterBasisPoints": 8500,
          "pricePerTonne": {
            "minor": -1,
            "currency": "GBP"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expectError": "feed 1: pricePerTonne must be from 0 to 100000000 minor units"
  },
  {
    "name": "a price in another currency is an error",
    "args": [
      [
        {
          "name": "hay",
          "freshKgPerHead": 10,
          "dryMatterBasisPoints": 8500,
          "pricePerTonne": {
            "minor": 12000,
            "currency": "GBP"
          }
        },
        {
          "name": "straw",
          "freshKgPerHead": 2,
          "dryMatterBasisPoints": 8600,
          "pricePerTonne": {
            "minor": 9000,
            "currency": "EUR"
          }
        }
      ],
      1,
      1,
      "GBP"
    ],
    "expectError": "feed 2: currency mismatch: EUR and GBP"
  }
]