Copy this text!
To manually test, copy the above text. The output below dumps DataTransfer state following each operation,

described directly above the output text for each step. The DataTransfer state should be consistent with the

operation performed at each step.


1. After adding all items
{
    "data": {
        "Files": "",
        "text/plain": "plain text string",
        "text/uri-list": "https://webkit.org"
    },
    "items": [
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/plain",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/uri-list",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        }
    ],
    "files": [
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        },
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        },
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        },
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        }
    ]
}

2. After removing at index 4
{
    "data": {
        "Files": "",
        "text/plain": "plain text string",
        "text/uri-list": "https://webkit.org"
    },
    "items": [
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/plain",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/uri-list",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        }
    ],
    "files": [
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        },
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        },
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        }
    ]
}
removedItem.getAsFile() should be null: null

3. After removing at index 1
{
    "data": {
        "Files": "",
        "text/plain": "plain text string",
        "text/uri-list": "https://webkit.org"
    },
    "items": [
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/plain",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/uri-list",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        }
    ],
    "files": [
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        },
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        }
    ]
}
removedItem.getAsFile() should be null: null

4. After removing at index 3
{
    "data": {
        "Files": "",
        "text/plain": "plain text string",
        "text/uri-list": "https://webkit.org"
    },
    "items": [
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/plain",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/uri-list",
            "kind": "string",
            "file": null
        }
    ],
    "files": [
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        }
    ]
}
removedItem.getAsFile() should be null: null

5. After clearing items
{
    "data": {},
    "items": [],
    "files": []
}

6. After adding two files and some string data again
{
    "data": {
        "Files": "",
        "text/html": "<strong>some styled text</strong>",
        "text/plain": "some plain text"
    },
    "items": [
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/html",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/plain",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        }
    ],
    "files": [
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        },
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        }
    ]
}

7. After removing at index 2
{
    "data": {
        "Files": "",
        "text/html": "<strong>some styled text</strong>"
    },
    "items": [
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/html",
            "kind": "string",
            "file": null
        },
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        }
    ],
    "files": [
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        },
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        }
    ]
}
removedItem.getAsFile() should be null: null

8. After removing at index 2
{
    "data": {
        "Files": "",
        "text/html": "<strong>some styled text</strong>"
    },
    "items": [
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        },
        {
            "type": "text/html",
            "kind": "string",
            "file": null
        }
    ],
    "files": [
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        }
    ]
}
removedItem.getAsFile() should be null: null

9. After removing at index 1
{
    "data": {
        "Files": ""
    },
    "items": [
        {
            "type": "text/plain",
            "kind": "file",
            "file": {
                "name": "file.txt",
                "bytes": 20,
                "type": "text/plain"
            }
        }
    ],
    "files": [
        {
            "name": "file.txt",
            "bytes": 20,
            "type": "text/plain"
        }
    ]
}
removedItem.getAsFile() should be null: null

10. After removing at index 0
{
    "data": {},
    "items": [],
    "files": []
}
removedItem.getAsFile() should be null: null