prevent input source map mutation (#3781)

fixes #3780
2020-04-15 10:25:58 +01:00
parent c4d28e3b2a
commit 6e9afdc94f
2 changed files with 16 additions and 6 deletions
--- a/test/mocha/sourcemaps.js
+++ b/test/mocha/sourcemaps.js
@@ -277,6 +277,12 @@ describe("sourcemaps", function() {
    });

    describe("input sourcemaps", function() {
+        it("Should not modify input source map", function() {
+            var orig = get_map();
+            var original = JSON.stringify(orig);
+            var map = prepare_map(orig);
+            assert.strictEqual(JSON.stringify(orig), original);
+        });
        it("Should copy over original sourcesContent", function() {
            var orig = get_map();
            var map = prepare_map(orig);