feat(jest.config.js): update collectCoverageFrom paths to include specific files for better test coverage

feat(package.json): add coverage script to run jest with coverage flag for generating test coverage report
style(readme.md): update image alt text for clarity and consistency

Author: multipliedtwice

jest.config.js

@@ -1,6 +1,6 @@
 /** @type {import('ts-jest').JestConfigWithTsJest} */
 module.exports = {
-    collectCoverageFrom: ['src/*.spec.{js,ts}'],
+    collectCoverageFrom: ['src/get-allowed-query.ts', 'src/index.ts', 'src/merge.ts'],
     modulePathIgnorePatterns: ['<rootDir>/dist/'],
     testEnvironment: 'node',
     preset: 'ts-jest',

package.json

@@ -8,7 +8,8 @@
   "scripts": {
     "test": "jest",
     "build": "tsc",
-    "prepublish": "npm run build"
+    "prepublish": "npm run build",
+    "coverage": "jest --coverage"
   },
   "repository": {
     "type": "git",

readme.md

@@ -1,6 +1,7 @@
 # GraphQL Query Purifier
+[![Coverage](https://img.shields.io/codecov/c/github/multipliedtwice/graphql-query-purifier/main.svg)](https://codecov.io/gh/multipliedtwice/graphql-query-purifier)
 
-![backticks-codeblocks](./static/typegraphql-prisma-purifier.png)
+![typegraphql-prisma-purifier](./static/typegraphql-prisma-purifier.png)
 
 ### [Demo](https://github.com/multipliedtwice/graphql-query-purifier-example)