Add some tests for generate.js

package.json

@@ -57,7 +57,8 @@
     "dev-prod": "comunica-compile-config config/config-default.json > .tmp-comunica-engine.js && ./bin/queries-to-json.js && webpack serve --config webpack.config.js --mode production",
     "dev": "comunica-compile-config config/config-default.json > .tmp-comunica-engine.js && ./bin/queries-to-json.js && webpack serve --config webpack.config.js --mode development",
     "build": "node ./bin/generate.js",
-    "version": "manual-git-changelog onversion"
+    "version": "manual-git-changelog onversion",
+    "test": "jest"
   },
   "dependencies": {
     "@babel/core": "^7.16.0",
@@ -69,6 +70,7 @@
     "@turf/centroid": "^6.5.0",
     "babel-loader": "^8.2.3",
     "file-loader": "^6.0.0",
+    "jest": "^29.7.0",
     "json-loader": "^0.5.7",
     "leaflet": "^1.7.1",
     "minimist": "^1.2.5",

test-queries/1.sparql

@@ -0,0 +1,4 @@
+prefix ex: <http://example.org/>
+SELECT ?a ?b WHERE {
+  ?a ex:example ?b.
+}

tests/generate.test.js

@@ -0,0 +1,38 @@
+import { existsSync, readFileSync } from 'fs';
+import { execSync } from 'child_process';
+
+describe('Build test: generate.js', () => {
+    beforeAll(() => {
+    });
+
+    describe('generate.js', () => {
+        describe('command line arguments', () => {
+            beforeEach(() => {
+                execSync('rm -rf testBuildOutput');
+            });
+
+            afterEach(() => {
+                execSync('rm -rf testBuildOutput');
+            });
+
+            it('should correctly handle option -d', async() => {
+                execSync('node bin/generate.js -d testBuildOutput', { encoding: 'utf-8' });  // the default is 'buffer'
+                expect(existsSync('testBuildOutput')).toEqual(true);
+            });
+
+            it('should correctly handle option -q', async() => {
+                execSync('node bin/generate.js -d testBuildOutput -q tests/test-queries', { encoding: 'utf-8' });  // the default is 'buffer'
+                let buildQueries = JSON.parse(readFileSync("./build/queries.json")).queries;
+                expect(buildQueries).toEqual(
+                    [
+                        {
+                            "name":"1",
+                            "datasources":[],
+                            "queryFormat":"sparql",
+                            "query":"prefix ex: <http://example.org/>\nSELECT ?a ?b WHERE {\n  ?a ex:example ?b.\n}"
+                        }
+                    ]);
+            });
+        });
+    });
+});

tests/test-queries/1.sparql

@@ -0,0 +1,4 @@
+prefix ex: <http://example.org/>
+SELECT ?a ?b WHERE {
+  ?a ex:example ?b.
+}