add js test and ci job

.github/workflows/ci.yml

@@ -54,3 +54,14 @@ jobs:
           javac -J-Xmx32m -version
           mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
           mvn test -B
+  test-js:
+    name: Test JS
+    needs: build
+    if: |
+      !cancelled() && !failure()
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - run: node src/test/javascript/salvation.test.js

src/main/java/com/shapesecurity/salvation2/Salvation2.java

@@ -38,13 +38,13 @@ public static String getErrorsForSerializedCSP(String policyText) {
 	}
 
 	@JSBody(params = {}, script =
-		"(exports || window).getErrorsForSerializedCSPList = (policyText) => {\n" +
+		"(window || globalThis).getErrorsForSerializedCSPList = (policyText) => {\n" +
 		"return javaMethods.get('com.shapesecurity.salvation2.Salvation2.getErrorsForSerializedCSPList(Ljava/lang/String;)Ljava/lang/String;').invoke(policyText)\n" +
 		"}")
 	static native void initParseList();
 
 	@JSBody(params = {}, script =
-		"(exports || window).getErrorsForSerializedCSP = (policyText) => {\n" +
+		"(window || globalThis).getErrorsForSerializedCSP = (policyText) => {\n" +
 			"return javaMethods.get('com.shapesecurity.salvation2.Salvation2.getErrorsForSerializedCSP(Ljava/lang/String;)Ljava/lang/String;').invoke(policyText)\n" +
 			"}")
 	static native void initParseSingle();

src/test/javascript/salvation.test.js

@@ -0,0 +1,39 @@
+const test = require('node:test');
+const assert = require('node:assert');
+const salvation = require('../../../target/javascript/salvation-v3.0.1.min.js');
+
+test('salvation initialization', () => {
+    assert.notStrictEqual(salvation.main, undefined);
+    try {
+        salvation.main();
+        assert.notStrictEqual(getErrorsForSerializedCSP, undefined);
+        assert.notStrictEqual(getErrorsForSerializedCSPList, undefined);
+    } catch (e) {
+        assert.fail('main function should not throw an exception', e.message);
+    }
+});
+
+test('.getErrorsForSerializedCSP() gives no errors for a valid CSP', () => {
+    salvation.main();
+    const result = getErrorsForSerializedCSP('default-src \'none\';');
+    assert.strictEqual(result.length, 0, 'No errors should be found');
+});
+
+test('.getErrorsForSerializedCSP() provides feedback', () => {
+    salvation.main();
+    const result = getErrorsForSerializedCSP('hello world');
+    assert.strictEqual(result, 'Warning at directive 0: Unrecognized directive hello');
+});
+
+test('.getErrorsForSerializedCSPList() gives no errors for a valid CSP', () => {
+    salvation.main();
+    const result = getErrorsForSerializedCSPList('default-src \'none\',plugin-types image/png application/pdf; sandbox,style-src https: \'self\'');
+    assert.strictEqual(result, '');
+});
+
+test('.getErrorsForSerializedCSPList() provides feedback', () => {
+    salvation.main();
+    const result = getErrorsForSerializedCSPList('hello,foobar,script-src \'self\'; style-src \'self\'');
+    assert.strictEqual(result, 'Warning at directive 0: Unrecognized directive hello\n'
+                             + 'Warning at directive 0: Unrecognized directive foobar');
+});