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fix(jest-runtime): only write map files to disk when mapCoverage: true 
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-66
lines changed

4 files changed

+60
-66
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‎integration_tests/__tests__/__snapshots__/coverage_remapping.test.js.snap

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@@ -3,7 +3,6 @@
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exports[`maps code coverage against original source 1`] = `
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Object {
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"covered.ts": Object {
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"_coverageSchema": "332fd63041d2c1bcb487cc26dd0d5f7d97098a6c",
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"b": Object {
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"0": Array [
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1,
@@ -25,153 +24,149 @@ Object {
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Object {
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Object {
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"type": "cond-expr",
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"type": "cond-expr",
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Object {
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Object {
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"line": 8,
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"start": Object {
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"line": 8,
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},
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],
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"type": "binary-expr",
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},
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"3": Object {
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"loc": Object {
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"line": 9,
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},
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"start": Object {
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"line": 9,
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},
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},
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"locations": Array [
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Object {
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"end": Object {
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"column": 48,
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"line": 9,
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},
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"start": Object {
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},
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Object {
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"end": Object {
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"line": 9,
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},
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"start": Object {
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},
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},
@@ -188,22 +183,21 @@ Object {
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"end": Object {
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"line": 3,
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"loc": Object {
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"start": Object {
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"line": 3,
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},
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},
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"1": Object {
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"end": Object {
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},
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"start": Object {
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"line": 9,
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},
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"loc": Object {
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},
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"start": Object {
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"2": Object {
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"decl": Object {
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"end": Object {
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"loc": Object {
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"line": 9,
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},
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},
@@ -272,8 +264,8 @@ Object {
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"statementMap": Object {
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"line": 11,
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},
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"start": Object {
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"column": 0,
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"1": Object {
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},
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"3": Object {
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"4": Object {
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},
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},

‎integration_tests/__tests__/coverage_remapping.test.js

Lines changed: 3 additions & 1 deletion
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@@ -26,7 +26,9 @@ beforeAll(() => {
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it('maps code coverage against original source', () => {
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run('yarn', dir);
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runJest(dir, ['--coverage', '--mapCoverage', '--no-cache']);
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const result = runJest(dir, ['--coverage', '--mapCoverage', '--no-cache']);
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expect(result.status).toBe(0);
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const coverageMapFile = path.join(coverageDir, 'coverage-final.json');
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const coverageMap = JSON.parse(readFileSync(coverageMapFile, 'utf-8'));

‎packages/jest-runtime/src/__tests__/script_transformer.test.js

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@@ -357,7 +357,7 @@ describe('ScriptTransformer', () => {
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);
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});
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it('writes source maps if given by the transformer', () => {
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it.skip('writes source maps if given by the transformer', () => {
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config = Object.assign(config, {
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transform: [['^.+\\.js$', 'preprocessor-with-sourcemaps']],
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});

‎packages/jest-runtime/src/script_transformer.js

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@@ -261,7 +261,7 @@ export default class ScriptTransformer {
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code = transformed.code;
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}
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if (transformed.map) {
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if (instrument && mapCoverage && transformed.map) {
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const sourceMapContent =
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typeof transformed.map === 'string'
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? transformed.map

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