Error handling + integration test data

[jmpargana]

What would you like to be added?

.

Why is this needed?

.

[jmpargana]

Cases

Array Iteration Filters
Iterate over arrays or object values for flattening or processing.
• .[] on [{"a":1},{"b":2}] → {"a":1} then {"b":2} (iterates object values).[jqlang +1]
• .[1:] on [0,1,2,3] → [1,2,3] (slice from index 1).
• .[] | .[] on [[1,2],[3]] → 1, 2, 3 (nested iteration) [hayageek].
Object Access Filters
Access fields or indices with dots/brackets.
• .foo on {"foo":42} → 42.
• .[0].bar on [{"bar":"baz"}] → "baz".
• .items[] | .name on {"items":[{"name":"x"},{"name":"y"}]} → "x" then "y" [gist.github].
Pipe Combinations
Chain operations for multi-step processing.
• .[] | {id: .id, name: .name} on array of objects → new objects {"id":1,"name":"foo"} etc. [hayageek].
• .users[] | .[0] on [ {"users":[["alice","bob"]]} ] → "alice".
• .data | {total: length, first: .[0]} on array → {"total":3,"first":{...}} (uses built-in length if available; otherwise skip).
Dictionary Building Filters
Construct objects from inputs.
• {odd: .[0], even: .[1]} on [1,2] → {"odd":1,"even":2}.
• .[] | {(.id): .value} on [{"id":1,"value":"a"}] → {"1":"a"} (dynamic keys).
• .fields[] | select(.required) | {name: .name} on object array → filtered required fields dict [container-solutions].

[jmpargana]

Error Handling
Ensure errors match jq’s messages and exit codes (non-zero).
• Division by zero: echo '1' | jq '1/0' → “cannot be divided because the divisor is zero” [github +1].
• Out-of-bounds: echo '[0]' | jq '.[-2]' → “Out of bounds negative array index” [github +1].
• Invalid path: echo '{}' | jq 'delpaths([[-200]])' → no error, unchanged [github +1].
• Syntax error: jq '{ unclosed' → “syntax error, unexpected end of file”.[github +1]

[jmpargana]

JSON Parsing Basics
Test fundamental JSON values and structures, as jq must handle them identically to the original.
• Empty objects {} and arrays [] with filter . → should output unchanged.[github +1]
• Null, true/false, numbers like 1, -1, 1e-19 with . → preserve exact values.[github +1]
• Byte order mark input: echo -ne '\xEF\xBB\xBF"byte order mark"' | jq . → "byte order mark" [github +1].
• Unicode escapes: echo '"Aa\\r\\n\\t\\b\\f\\u03bc"' | jq . → "Aa\r\n\t\b\fμ" [github +1].
• Invalid escape: echo '"u\\vw"' | jq . → parse error [github +1].