Add tests for MultiSpan in the JS API

js-api-spec/compile.test.ts

@@ -299,6 +299,14 @@ describe('compileString', () => {
             compileString('@error "oh no"', {url})
           ).toThrowSassException({line: 0, url});
         }));
+
+      it('with multi-span errors', () =>
+        sandbox(dir => {
+          const url = dir.url('foo.scss');
+          expect(() =>
+            compileString('@use "sass:math"; @use "sass:math"', {url})
+          ).toThrowSassException({line: 0, url});
+        }));
     });
 
     it('throws an error for an unrecognized style', () => {

js-api-spec/logger.test.ts

@@ -20,6 +20,24 @@ it('emits debug to stderr by default', () => {
   expect(stdio.err).not.toBeEmpty();
 });
 
+describe('deprecation warning', () => {
+  // Regression test for sass/dart-sass#1790
+  it('passes the message and span to the logger', done => {
+    compileString('* > { --foo: bar }', {
+      logger: {
+        warn(message, {span}) {
+          expect(message).toInclude('only valid for nesting');
+          expect(span?.start.line).toBe(0);
+          expect(span?.start.column).toBe(0);
+          expect(span?.end.line).toBe(0);
+          expect(span?.end.column).toBe(4);
+          done();
+        },
+      },
+    });
+  });
+});
+
 describe('with @warn', () => {
   it('passes the message and stack trace to the logger', done => {
     compileString(