voidenhq/core-plugins/simple-assertions

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npx vskill@latest install voidenhq/core-plugins/simple-assertions

SKILL.md

Extension: Simple Assertions

Provides the assertions-table block for writing test assertions against HTTP responses. Insert with /assertions slash command.

assertions-table — Response Assertions
yaml
---
type: assertions-table
attrs:
uid: "uid"
content:
- type: table
rows:
- attrs: { disabled: false }
row: ["Status is 200", "status", "equals", "200"]
- attrs: { disabled: false }
row: ["Has user id", "body.id", "exists", ""]
- attrs: { disabled: false }
row: ["Name is John", "body.name", "equals", "John"]
- attrs: { disabled: false }
row: ["Has items", "body.items", "contains", "product"]
- attrs: { disabled: true }
row: ["Response time", "responseTime", "lessThan", "500"]
---

Row format: [description, field, operator, expected-value]

Field Paths
FieldDescription
statusHTTP status code (e.g. 200, 404)
bodyFull response body
body.fieldJSONPath into response body
body.nested.fieldNested JSONPath
headers.content-typeResponse header value
responseTimeResponse time in milliseconds
Operators
OperatorDescriptionExample expected
equalsExact match"200", "John"
notEqualsDoes not match"error"
containsString contains"success"
notContainsDoes not contain"error"
existsField is present (non-null)"" (leave empty)
notExistsField is absent or null""
matchesRegex match"^[0-9]+$"
greaterThanNumeric greater than"0"
lessThanNumeric less than"1000"
Common Assertion Patterns
yaml
# Check status code
row: ["Success response", "status", "equals", "200"]
# Check a body field exists
row: ["Has ID", "body.id", "exists", ""]
# Check a body field value
row: ["Correct name", "body.name", "equals", "John Doe"]
# Check response time under 500ms
row: ["Fast response", "responseTime", "lessThan", "500"]
# Check header value
row: ["JSON content type", "headers.content-type", "contains", "application/json"]
# Check nested field
row: ["Has email", "body.user.email", "exists", ""]

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