MCP For Claude Marketplace
Test Assertion Density Calculator

Test Assertion Density Calculator MCP Connector for Claude

A+

Measure the ratio of test assertions to test cases to identify ineffective or empty test scaffolding.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner
More Details Connect to Claude

The Test Assertion Density Calculator is a specialized tool designed to improve test suite reliability. It analyzes source code files to calculate the mathematical relationship between test blocks (like it, test, or decribe) and assertion calls (such as expect, assert, or should). By identifying 'empty' tests that execute without verifying any behavior, it helps developers prevent the growth of ineffective test scaffolding. Use calculate_assertion_metrics to quantify density and summarize_empty_test_locations to find specific gaps in your coverage.

testingassertionscoveragecode-qualityautomation

3 tools expose this connector's capabilities to your AI agent.

calculate_assertion_metrics

Quantifies the relationship between tests and assertions within specific source code files

get_standard_threshold_presets

Allows users to select from predefined density standards

summarize_empty_test_locations

Provides a human-readable report of where test cases are currently failing to provide coverage

See how to talk to your AI agent using Test Assertion Density Calculator.

Analyze this test file for assertion density: 'test("math", () => { expect(1+1).toBe(2); });'

The analysis shows a total of 1 test case and 1 assertion, resulting in an assertion density of 1.0.

Check if my tests are empty using this content: 'it("empty test", () => { });'

The tool identified 1 empty test case at line 1 with zero assertions.

What are the standard density presets available?

The available presets are: strict, balanced, and loose.

Assertion density is the ratio of the number of assertions to the number of test cases. A higher density indicates more thorough verification.

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