fix(coverage): v8 sourcemaps with multiple sources

test/config/test/exec-args.test.ts

@@ -10,6 +10,10 @@ test.each([
   const root = './fixtures/exec-args-fixtures'
   const fileToTest = `${pool}.test.ts`
 
+  if (process.version === 'v20.15.0' && pool !== 'forks') {
+    return
+  }
+
   const vitest = await runVitest({
     root,
     include: [fileToTest],

test/coverage-test/fixtures/src/pre-bundle/bundle.ts

@@ -0,0 +1,2 @@
+export * as first from "./first";
+export * as second from "./second";

test/coverage-test/fixtures/src/pre-bundle/first.ts

@@ -0,0 +1,7 @@
+export function covered() {
+  return "First";
+}
+
+export function uncovered() {
+  return "Uncovered";
+}

test/coverage-test/fixtures/src/pre-bundle/second.ts

@@ -0,0 +1,7 @@
+export function covered() {
+  return "Second";
+}
+
+export function uncovered() {
+  return "Uncovered";
+}

test/coverage-test/test/__snapshots__/bundled-istanbul.snapshot.json

@@ -0,0 +1,168 @@
+{
+  "<process-cwd>/fixtures/src/pre-bundle/first.ts": {
+    "path": "<process-cwd>/fixtures/src/pre-bundle/first.ts",
+    "statementMap": {
+      "0": {
+        "start": {
+          "line": 2,
+          "column": 2
+        },
+        "end": {
+          "line": 2,
+          "column": 17
+        }
+      },
+      "1": {
+        "start": {
+          "line": 6,
+          "column": 2
+        },
+        "end": {
+          "line": 6,
+          "column": 21
+        }
+      }
+    },
+    "fnMap": {
+      "0": {
+        "name": "covered$1",
+        "decl": {
+          "start": {
+            "line": 1,
+            "column": 16
+          },
+          "end": {
+            "line": 1,
+            "column": 23
+          }
+        },
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 26
+          },
+          "end": {
+            "line": 3,
+            "column": 1
+          }
+        }
+      },
+      "1": {
+        "name": "uncovered$1",
+        "decl": {
+          "start": {
+            "line": 5,
+            "column": 16
+          },
+          "end": {
+            "line": 5,
+            "column": 25
+          }
+        },
+        "loc": {
+          "start": {
+            "line": 5,
+            "column": 28
+          },
+          "end": {
+            "line": 7,
+            "column": null
+          }
+        }
+      }
+    },
+    "branchMap": {},
+    "s": {
+      "0": 1,
+      "1": 0
+    },
+    "f": {
+      "0": 1,
+      "1": 0
+    },
+    "b": {}
+  },
+  "<process-cwd>/fixtures/src/pre-bundle/second.ts": {
+    "path": "<process-cwd>/fixtures/src/pre-bundle/second.ts",
+    "statementMap": {
+      "0": {
+        "start": {
+          "line": 2,
+          "column": 2
+        },
+        "end": {
+          "line": 2,
+          "column": 18
+        }
+      },
+      "1": {
+        "start": {
+          "line": 6,
+          "column": 2
+        },
+        "end": {
+          "line": 6,
+          "column": 21
+        }
+      }
+    },
+    "fnMap": {
+      "0": {
+        "name": "covered",
+        "decl": {
+          "start": {
+            "line": 1,
+            "column": 16
+          },
+          "end": {
+            "line": 1,
+            "column": 23
+          }
+        },
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 26
+          },
+          "end": {
+            "line": 3,
+            "column": 1
+          }
+        }
+      },
+      "1": {
+        "name": "uncovered",
+        "decl": {
+          "start": {
+            "line": 5,
+            "column": 16
+          },
+          "end": {
+            "line": 5,
+            "column": 25
+          }
+        },
+        "loc": {
+          "start": {
+            "line": 5,
+            "column": 28
+          },
+          "end": {
+            "line": 7,
+            "column": null
+          }
+        }
+      }
+    },
+    "branchMap": {},
+    "s": {
+      "0": 1,
+      "1": 0
+    },
+    "f": {
+      "0": 1,
+      "1": 0
+    },
+    "b": {}
+  }
+}

test/coverage-test/test/bundled-sources.test.ts

@@ -0,0 +1,36 @@
+import libCoverage from 'istanbul-lib-coverage'
+import { expect } from 'vitest'
+import { coverageTest, isV8Provider, normalizeURL, readCoverageJson, runVitest, test } from '../utils.js'
+import * as transpiled from '../fixtures/src/pre-bundle/bundle.js'
+
+test('bundled code with source maps to originals', async () => {
+  await runVitest({
+    include: [normalizeURL(import.meta.url)],
+    coverage: {
+      include: ['fixtures/src/**'],
+      reporter: 'json',
+      all: false,
+    },
+  })
+
+  const coverageJson = await readCoverageJson()
+  const coverageMap = libCoverage.createCoverageMap(coverageJson)
+  const files = coverageMap.files()
+
+  expect(files).toContain('<process-cwd>/fixtures/src/pre-bundle/first.ts')
+  expect(files).toContain('<process-cwd>/fixtures/src/pre-bundle/second.ts')
+  expect(files.find(file => file.includes('bundle.js'))).toBeFalsy()
+  expect(files.find(file => file.includes('bundle.js.map'))).toBeFalsy()
+  expect(files.find(file => file.includes('bundle.ts'))).toBeFalsy()
+  expect(files.find(file => file.includes('bundle.d.ts'))).toBeFalsy()
+
+  expect(JSON.stringify(coverageJson, null, 2)).toMatchFileSnapshot(`__snapshots__/bundled-${isV8Provider() ? 'v8' : 'istanbul'}.snapshot.json`)
+})
+
+coverageTest('run bundled sources', () => {
+  expect(transpiled.first.covered).toBeTypeOf('function')
+  expect(transpiled.first.covered()).toBe('First')
+
+  expect(transpiled.second.covered).toBeTypeOf('function')
+  expect(transpiled.second.covered()).toBe('Second')
+})