sourcesContent not correctly handled in coverage reporter with --enable-source-maps #55106
Description
Version
node-v23.0.0-nightly202409243c5ceff85f
Platform
N/A
Subsystem
test_runner
What steps will reproduce the bug?
The Node.js coverage reporter does not correctly handle source maps with a custom sourcesContent and --with-source-maps.
This example was taken from the test-runner/coverage fixture:
- Generate a sourcemap via:
echo "import { test } from 'node:test';
test('ok', () => {});
function uncovered() {
return 'uncovered';
}
" | npx esbuild --sourcemap --sourcefile=stdin.test.ts --sources-content=true --bundle --platform=node --outfile="stdin.test.js"Output
// stdin.test.ts
var import_node_test = require("node:test");
(0, import_node_test.test)("ok", () => {
});
//# sourceMappingURL=stdin.test.js.map{
"version": 3,
"sources": ["stdin.test.ts"],
"sourcesContent": ["import { test } from 'node:test';\ntest('ok', () => {});\n\nfunction uncovered() {\n return 'uncovered';\n}\n\n"],
"mappings": ";AAAA,uBAAqB;AAAA,IACrB,uBAAK,MAAM,MAAM;AAAC,CAAC;",
"names": []
}- Compare the output of
node --test --experimental-test-coverage --enable-source-mapswithnode --test --experimental-test-coverage
How often does it reproduce? Is there a required condition?
Everytime
What is the expected behavior? Why is that the expected behavior?
Without --enable-source-maps:
ℹ start of coverage report
ℹ --------------------------------------------------------------
ℹ file | line % | branch % | funcs % | uncovered lines
ℹ --------------------------------------------------------------
ℹ stdin.test.ts | 57.14 | 100.00 | 100.00 | 4-6
ℹ --------------------------------------------------------------
ℹ all files | 57.14 | 100.00 | 100.00 |
ℹ --------------------------------------------------------------
ℹ end of coverage report
What do you see instead?
ℹ start of coverage report
ℹ ----------------------------------------------------------------
ℹ file | line % | branch % | funcs % | uncovered lines
ℹ ----------------------------------------------------------------
ℹ stdin.test.ts | 42.86 | 100.00 | 0.00 | 2 4-6
ℹ ----------------------------------------------------------------
ℹ all files | 42.86 | 100.00 | 0.00 |
ℹ ----------------------------------------------------------------
ℹ end of coverage report
Additional information
No response
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