generate-test-code
Generate Vitest test code based on boundary value analysis and equivalence partitioning from JSON specification
LABSCO SUMMARY
The tedious half of test writing, handed to something that does not forget a boundary.
You describe the field ranges once and get back every boundary and its neighbours, every valid and invalid category member, combined pairwise when the parameter count makes that sensible. The assertions are left to you, so it produces a scaffold rather than a finished suite.
What it is
A server with a single tool: give it a JSON specification of fields and value ranges, and it returns Vitest test code built from boundary-value analysis and equivalence partitioning.
What you get
- generate-test-code, which turns a JSON specification into runnable Vitest code
- Boundary values generated around every continuous range — just below, at, just above, and the middle
- Discontinuous ranges handled properly, including the gap values that fall between two valid windows
- Categorical fields expanded into both their valid and their invalid members
- Pairwise combinations once a specification has enough parameters that the full cross-product would be wasteful, and all combinations when it does not
- Output in the test.each form, split into valid and invalid blocks with markers where your subject under test goes
- Prompts explaining how to write the specification, with boundary and equivalence examples
Requirements
Nothing — no account, no key. Runs under Node.
Setup effort
One command — npx testing-mcp-vitest
USE CASES
01
Covering a validation function properly the first time
Describe the accepted ranges and categories, and get the boundary and invalid cases enumerated for you.
02
Testing a field with more than one valid window
Declare each range separately and get cases for both windows plus the gap between them.
03
Keeping a many-parameter case from exploding
Let the generator switch to pairwise combinations instead of writing out the full cross-product.
1 tool
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
BEFORE YOU INSTALL
What to know first
Tools you get
1 tool when we connected.
Requires
npx on PATH
CONTEXT COST
Light Standing cost
Rated by the size of the one tool definition that rides along on every turn
INSTALLATION
Connect your client
Add the block to your client, or run the command directly.
Server setup
Configuration file
JSON
{
"mcpServers": {
"testing-mcp-vitest": {
"command": "npx",
"args": [
"testing-mcp-vitest"
]
}
}
}npx
TERMINAL
npx testing-mcp-vitest
