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test(idn-hostname): reject A-labels that decode to an invalid U-label #935

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test(idn-hostname): reject A-labels that decode to an invalid U-label #935

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22dc2e1
test(idn-hostname): reject A-labels that decode to an invalid U-label
vtushar06 Jun 11, 2026
a7edb07
test(idn-hostname): use rfc-editor.org for RFC links
vtushar06 Jun 11, 2026
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12 changes: 12 additions & 0 deletions tests/draft2019-09/optional/format/idn-hostname.json
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Original file line number Diff line number Diff line change
Expand Up @@ -331,12 +331,24 @@
"description": "empty string",
"data": "",
"valid": false
},
{
"description": "A-label that decodes to a disallowed code point is invalid",
"comment": "https://www.rfc-editor.org/rfc/rfc5890#section-2.3.2.1 https://www.rfc-editor.org/rfc/rfc5892#section-2.6",
"data": "xn--7a",
"valid": false
},
{
"description": "A-label that decodes to a Bidi rule violation is invalid",
"comment": "https://www.rfc-editor.org/rfc/rfc5890#section-2.3.2.1 https://www.rfc-editor.org/rfc/rfc5893",
"data": "xn--0ca24w",
"valid": false
}
]
},
{
"description": "validation of separators in internationalized host names",
"specification": [

Check notice on line 351 in tests/draft2019-09/optional/format/idn-hostname.json

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Specification Link 

https://www.rfc-editor.org/rfc/rfc3490.html#section-3.1
{"rfc3490": "3.1", "quote": "Whenever dots are used as label separators, the following characters MUST be recognized as dots: U+002E (full stop), U+3002 (ideographic full stop), U+FF0E (fullwidth full stop), U+FF61(halfwidth ideographic full stop)"}
],
"schema": {
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12 changes: 12 additions & 0 deletions tests/draft2020-12/optional/format/idn-hostname.json
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Original file line number Diff line number Diff line change
Expand Up @@ -331,12 +331,24 @@
"description": "empty string",
"data": "",
"valid": false
},
{
"description": "A-label that decodes to a disallowed code point is invalid",
"comment": "https://www.rfc-editor.org/rfc/rfc5890#section-2.3.2.1 https://www.rfc-editor.org/rfc/rfc5892#section-2.6",
"data": "xn--7a",
"valid": false
},
{
"description": "A-label that decodes to a Bidi rule violation is invalid",
"comment": "https://www.rfc-editor.org/rfc/rfc5890#section-2.3.2.1 https://www.rfc-editor.org/rfc/rfc5893",
"data": "xn--0ca24w",
"valid": false
}
]
},
{
"description": "validation of separators in internationalized host names",
"specification": [

Check notice on line 351 in tests/draft2020-12/optional/format/idn-hostname.json

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GitHub Actions / annotate

Specification Link 

https://www.rfc-editor.org/rfc/rfc3490.html#section-3.1
{"rfc3490": "3.1", "quote": "Whenever dots are used as label separators, the following characters MUST be recognized as dots: U+002E (full stop), U+3002 (ideographic full stop), U+FF0E (fullwidth full stop), U+FF61(halfwidth ideographic full stop)"}
],
"schema": {
Expand Down
12 changes: 12 additions & 0 deletions tests/draft7/optional/format/idn-hostname.json
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Original file line number Diff line number Diff line change
Expand Up @@ -323,12 +323,24 @@
"description": "empty string",
"data": "",
"valid": false
},
{
"description": "A-label that decodes to a disallowed code point is invalid",
"comment": "https://www.rfc-editor.org/rfc/rfc5890#section-2.3.2.1 https://www.rfc-editor.org/rfc/rfc5892#section-2.6",
"data": "xn--7a",
"valid": false
},
{
"description": "A-label that decodes to a Bidi rule violation is invalid",
"comment": "https://www.rfc-editor.org/rfc/rfc5890#section-2.3.2.1 https://www.rfc-editor.org/rfc/rfc5893",
"data": "xn--0ca24w",
"valid": false
}
]
},
{
"description": "validation of separators in internationalized host names",
"specification": [

Check notice on line 343 in tests/draft7/optional/format/idn-hostname.json

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GitHub Actions / annotate

Specification Link 

https://www.rfc-editor.org/rfc/rfc3490.html#section-3.1
{"rfc3490": "3.1", "quote": "Whenever dots are used as label separators, the following characters MUST be recognized as dots: U+002E (full stop), U+3002 (ideographic full stop), U+FF0E (fullwidth full stop), U+FF61(halfwidth ideographic full stop)"}
],
"schema": { "format": "idn-hostname" },
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12 changes: 12 additions & 0 deletions tests/v1/format/idn-hostname.json
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Original file line number Diff line number Diff line change
Expand Up @@ -331,6 +331,18 @@
"description": "empty string",
"data": "",
"valid": false
},
{
"description": "A-label that decodes to a disallowed code point is invalid",
"comment": "https://www.rfc-editor.org/rfc/rfc5890#section-2.3.2.1 https://www.rfc-editor.org/rfc/rfc5892#section-2.6",
"data": "xn--7a",
"valid": false
},
{
"description": "A-label that decodes to a Bidi rule violation is invalid",
"comment": "https://www.rfc-editor.org/rfc/rfc5890#section-2.3.2.1 https://www.rfc-editor.org/rfc/rfc5893",
"data": "xn--0ca24w",
"valid": false
}
]
},
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