test: add tests

package.json

@@ -5,7 +5,7 @@
   "main": "src/index.cjs",
   "type": "commonjs",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "jest"
   },
   "repository": {
     "type": "git",
@@ -21,13 +21,18 @@
     "url": "https://github.com/scratchfoundation/scratch-webpack-configuration/issues"
   },
   "homepage": "https://github.com/scratchfoundation/scratch-webpack-configuration#readme",
+  "dependencies": {
+    "lodash.merge": "^4.6.2",
+    "webpack-node-externals": "^3.0.0"
+  },
+  "devDependencies": {
+    "@types/jest": "^29.5.12",
+    "jest": "^29.7.0",
+    "webpack": "^5.90.3"
+  },
   "peerDependencies": {
     "@babel/preset-env": "^7.24.0",
     "babel-loader": "^9.1.3",
     "webpack": "^5.90.3"
-  },
-  "dependencies": {
-    "lodash.merge": "^4.6.2",
-    "webpack-node-externals": "^3.0.0"
   }
 }

test/targets.test.js

@@ -0,0 +1,35 @@
+const path = require('path');
+
+const webpack = require('webpack');
+
+const ScratchWebpackConfigBuilder = require('../src/index.cjs');
+
+const common = {
+    libraryName: 'test-library',
+    rootPath: path.resolve(__dirname)
+};
+
+describe('generating configurations for specific targets', () => {
+    it('should should generate a valid configuration without a target', () => {
+        const genericConfig = new ScratchWebpackConfigBuilder(common)
+            .get();
+        expect(genericConfig).not.toHaveProperty('target');
+        expect(() => webpack.validate(genericConfig)).not.toThrow();
+    });
+
+    it('should should generate a valid `node` configuration', () => {
+        const nodeConfig = new ScratchWebpackConfigBuilder(common)
+            .setTarget('node')
+            .get();
+        expect(nodeConfig).toMatchObject({target: 'node'});
+        expect(() => webpack.validate(nodeConfig)).not.toThrow();
+    });
+
+    it('should should generate a valid `browserslist` configuration', () => {
+        const webConfig = new ScratchWebpackConfigBuilder(common)
+            .setTarget('browserslist')
+            .get();
+        expect(webConfig).toMatchObject({target: 'browserslist'});
+        expect(() => webpack.validate(webConfig)).not.toThrow();
+    });
+});