[
    {
        "description": "validation of duration strings",
        "schema": {"format": "duration"},
        "tests": [
            {
                "description": "a valid duration string",
                "data": "P4DT12H30M5S",
                "valid": true
            },
            {
                "description": "an invalid duration string",
                "data": "PT1D",
                "valid": false
            },
            {
                "description": "no elements present",
                "data": "P",
                "valid": false
            },
            {
                "description": "no time elements present",
                "data": "P1YT",
                "valid": false
            },
            {
                "description": "no date or time elements present",
                "data": "PT",
                "valid": false
            },
            {
                "description": "elements out of order",
                "data": "P2D1Y",
                "valid": false
            },
            {
                "description": "missing time separator",
                "data": "P1D2H",
                "valid": false
            },
            {
                "description": "time element in the date position",
                "data": "P2S",
                "valid": false
            },
            {
                "description": "four years duration",
                "data": "P4Y",
                "valid": true
            },
            {
                "description": "zero time, in seconds",
                "data": "PT0S",
                "valid": true
            },
            {
                "description": "zero time, in days",
                "data": "P0D",
                "valid": true
            },
            {
                "description": "one month duration",
                "data": "P1M",
                "valid": true
            },
            {
                "description": "one minute duration",
                "data": "PT1M",
                "valid": true
            },
            {
                "description": "one and a half days, in hours",
                "data": "PT36H",
                "valid": true
            },
            {
                "description": "one and a half days, in days and hours",
                "data": "P1DT12H",
                "valid": true
            },
            {
                "description": "two weeks",
                "data": "P2W",
                "valid": true
            },
            {
                "description": "weeks cannot be combined with other units",
                "data": "P1Y2W",
                "valid": false
            },
            {
                "description": "non-ascii digits should be rejected",
                "data": "P২Y",
                "valid": false
            }
        ]
    }
]