Description
Construct bounded caller data tables with controlled column-scope mutations, reporting lexical th-scope checks separately from a designed simple column-header association key.
An interface fixture makes content and state explicit so a consumer can test a rendering or interaction. Literal labels, modeled states, and calculated geometry remain separate from what a browser or assistive technology actually displays or announces.
Construct bounded caller data tables with controlled column-scope mutations, reporting lexical th-scope checks separately from a designed simple column-header association key.
When to use this tool
Use this generator to create reproducible table header association fixture cases from the supplied model or bank. Inspect the returned evidence before using cases in a test or exercise.
How to use the tool and how it works
- Supply headers, rows, modes, count in the field shapes below. Set seed when you need an explicit replay.
- Run the tool and correct any input error. For generated controls, distinguish a successful fixture containing an invalid case from failure to generate the fixture.
- Read cases. Use the conventions below and keep answer-bearing fields separate when presenting an exercise.
Build a rectangular table and select a header column to keep or mutate to row, missing, or invalid scope. Delegate scope keyword checking, compare the result with the intended column-header design, and return per-cell expected versus modeled header IDs plus escaped table markup.1
Delegated operations used for this result: table th scope a11y checker. Their calculation or parsing conventions apply to the corresponding result fields.2
| Input field | Meaning and units | Accepted input |
|---|---|---|
| headers | Headers | Required. Array of Object; no unknown keys.; minimum items 1; maximum items 16. |
| headers[].label | Caller-facing text label; not a globally unique identifier. | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 128. |
| headers[].scope | Scope | Required. Text; maximum UTF-16 length 256. |
| rows | Rows | Required. Array of Array of Text; maximum UTF-16 length 256.; minimum items 1; maximum items 16.; minimum items 1; maximum items 16. |
| modes | Modes | Required. Array of Text; one of "unchanged", "row", "missing", "invalid".; minimum items 1; maximum items 4. |
| count | Requested count; the mechanics explain whether one draw expands into several returned records. | Required. Safe integer; minimum 1; maximum 16. |
| seed | Optional numeric seed; takes precedence over context randomness. Without either, use the fixed tool.io default seed. | Optional. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| cases | Cases | Required. Array of Object; no unknown keys.; minimum items 1; maximum items 16. |
| cases[].mutatedColumn | Mutated Column | Required. Safe integer; minimum 0; maximum 15. |
| cases[].mode | Mode | Required. Text; one of "unchanged", "row", "missing", "invalid". |
| cases[].html | Html | Required. Text; maximum UTF-16 length 131072. |
| cases[].headers | Headers | Required. Array of Object; no unknown keys.; minimum items 1; maximum items 16. |
| cases[].headers[].id | Literal identifier used to match records, independently of their display labels. | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 32. |
| cases[].headers[].scope | Scope | Required. Text; maximum UTF-16 length 256. or Null. |
| cases[].headers[].check | Check | Required. Object; no unknown keys. |
| cases[].headers[].check.state | State | Required. Text; one of "auto", "row", "col", "rowgroup", "colgroup". |
| cases[].headers[].check.validKeyword | Valid Keyword | Required. Boolean. |
| cases[].headers[].matchesColumnDesign | Matches Column Design | Required. Boolean. |
| cases[].cells | Cells | Required. Array of Object; no unknown keys.; minimum items 1; maximum items 128. |
| cases[].cells[].row | Row | Required. Safe integer; minimum 0; maximum 15. |
| cases[].cells[].column | Column | Required. Safe integer; minimum 0; maximum 15. |
| cases[].cells[].text | Text | Required. Text; maximum UTF-16 length 256. |
| cases[].cells[].expectedHeaderId | Expected Header Id | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 32. |
| cases[].cells[].modeledHeaderId | Modeled Header Id | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 32. or Null. |
| randomness | Replay metadata: source is seed or context; seed is the normalized 32-bit seed or null for a context source. | Required. Object; no unknown keys. |
| randomness.seed | Optional numeric replay seed; normalization and precedence are explained below. | Required. Safe integer. or Null. |
| randomness.source | Source | Required. Text; one of "context", "seed". |
An explicit safe-integer seed takes precedence over injected context randomness and is normalized to an unsigned 32-bit integer. With no seed and no context source, replay uses the fixed tool.io default seed. A context source must return finite values from zero inclusive to one exclusive; its advancing state must be retained separately. randomness records the source and normalized seed, or null for context. These generators are not cryptographic random sources.
{
"input": {
"headers": [
{
"label": "Name",
"scope": "col"
},
{
"label": "Count",
"scope": "col"
}
],
"rows": [
[
"A",
"2"
]
],
"modes": [
"unchanged",
"row",
"missing",
"invalid"
],
"count": 1,
"seed": 42
},
"output": {
"cases": [
{
"mutatedColumn": 1,
"mode": "row",
"html": "<table><thead><tr><th id=\"header-0\" scope=\"col\">Name</th><th id=\"header-1\" scope=\"row\">Count</th></tr></thead><tbody><tr><td>A</td><td>2</td></tr></tbody></table>",
"headers": [
{
"id": "header-0",
"scope": "col",
"check": {
"state": "col",
"validKeyword": true
},
"matchesColumnDesign": true
},
{
"id": "header-1",
"scope": "row",
"check": {
"state": "row",
"validKeyword": true
},
"matchesColumnDesign": false
}
],
"cells": [
{
"row": 0,
"column": 0,
"text": "A",
"expectedHeaderId": "header-0",
"modeledHeaderId": "header-0"
},
{
"row": 0,
"column": 1,
"text": "2",
"expectedHeaderId": "header-1",
"modeledHeaderId": null
}
]
}
],
"randomness": {
"seed": 42,
"source": "seed"
}
}
}Limitations and assumptions
- The association model covers this simple column-header design only. A valid row keyword can still mismatch that design; lexical validity is distinct from browser accessibility behavior.
- A replay requires the same complete input and implementation. Randomized construction does not guarantee uniform coverage of every feasible output; finite samples can repeat unless a distinct-selection rule is explicitly stated.
- The field tables state structural bounds; cross-field constraints and bounded search or output budgets also apply. Unknown keys are rejected where the object contract disallows them. Input errors are distinct from null fields and deliberate invalid controls in a successful output.
Alternative or Complementary methods
For a supplied example, inspect the returned construction or delegated check directly. To evaluate a consumer, also test cases chosen for its own boundaries; a generated finite corpus does not establish exhaustive coverage.
References
Similar or alternative tools
- Random Table Column Visibility Fixture Generator
Shuffle supplied unique columns and draw optional visibility while retaining required columns and stable left/none/right pin partitions.
- Random Heading Hierarchy Mutation Corpus Generator
Mutate caller heading sequences at a constructible interior position to introduce an upward skip, retaining baseline and mutated markup and the existing outline heuristic.