tests: Verify collection example

Author: l0b0

package.json

@@ -2,12 +2,13 @@
   "name": "stac-extensions",
   "version": "1.1.0",
   "scripts": {
-    "test": "npm run check-markdown && npm run check-examples",
+    "test": "jest && npm run check-markdown && npm run check-examples",
     "check-markdown": "remark . -f -r .github/remark.yaml",
     "check-examples": "stac-node-validator . --lint --verbose --schemaMap https://stac-extensions.github.io/processing/v1.1.0/schema.json=./json-schema/schema.json",
     "format-examples": "stac-node-validator . --format --schemaMap https://stac-extensions.github.io/processing/v1.1.0/schema.json=./json-schema/schema.json"
   },
   "dependencies": {
+    "jest": "^27.4.4",
     "remark-cli": "^8.0.0",
     "remark-lint": "^7.0.0",
     "remark-lint-no-html": "^2.0.0",

tests/collection.test.js

@@ -0,0 +1,25 @@
+const { join } = require('path');
+const { promises } = require('fs');
+const { AjvOptions, rootDirectory, schemaPath } = require('./validation.js');
+const ajv = new (require('ajv'))(AjvOptions);
+
+const examplePath = join(rootDirectory, 'examples/collection.json');
+
+let validate;
+beforeAll(async () => {
+	const data = JSON.parse(await promises.readFile(schemaPath));
+	validate = await ajv.compileAsync(data);
+});
+
+describe('Collection example', () => {
+	it('should pass validation', async () => {
+		// given
+		const example = JSON.parse(await promises.readFile(examplePath));
+
+		// when
+		let valid = validate(example);
+
+		// then
+		expect(valid).toBeTruthy()
+	});
+});

tests/validation.js

@@ -0,0 +1,31 @@
+const axios = require('axios');
+const { dirname, join } = require('path');
+const iriFormats = require('stac-node-validator/iri.js');
+
+// const directory = dirname(fileURLToPath(import.meta.url));
+
+const Schemas = new Map();
+const loadSchema = function (uri) {
+	let existing = Schemas.get(uri);
+	if (existing == null) {
+		existing = loadSchemaFromUri(uri);
+		Schemas.set(uri, existing);
+	}
+	return existing;
+}
+
+/**
+ * function passed in to Ajv instance which allows us to load schemas from a url at run time.
+ */
+module.exports.loadSchemaFromUri = async function (uri) {
+	try {
+		let response = await axios.get(uri);
+		return response.data;
+	} catch (error) {
+		throw new Error(`-- Schema at '${uri}' not found. Please ensure all entries in 'stac_extensions' are valid.`);
+	}
+}
+
+module.exports.AjvOptions = {loadSchema, formats: Object.assign(iriFormats)};
+module.exports.rootDirectory = dirname(__dirname);
+module.exports.schemaPath = join(module.exports.rootDirectory, 'json-schema/schema.json');