fix: mappedCoverage.addStatement is not a function (#500)

When testing both original and transpiled sources it was possible for mappedCoverage to be a FileCoverage instance when it needed to be a MappedCoverage instance. Fixes istanbuljs/nyc#940
istanbuljs · Nov 15, 2019 · d77cc14 · d77cc14
1 parent 597234b
commit d77cc14
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/istanbul-lib-source-maps/lib/transformer.js b/packages/istanbul-lib-source-maps/lib/transformer.js
@@ -119,7 +119,7 @@ class SourceMapTransformer {
             } else {
                 uniqueFiles[getUniqueKey(file)] = {
                     file,
-                    mappedCoverage: fc
+                    mappedCoverage: new MappedCoverage(fc)
                 };
             }
         }