exclude test files themselves from coverage

Fix: #881

package.json

@@ -22,7 +22,7 @@
     "@11ty/eleventy-plugin-syntaxhighlight": "^5.0.0",
     "@esbuild-kit/cjs-loader": "^2.4.2",
     "@esbuild-kit/esm-loader": "^2.5.5",
-    "@tapjs/processinfo": "^3.0.2",
+    "@tapjs/processinfo": "^3.1.0",
     "@types/diff": "^5.0.3",
     "@types/ms": "^0.7.31",
     "@types/mustache": "^4.2.2",

src/core/package.json

@@ -46,7 +46,7 @@
     "coverage-map": "map.js"
   },
   "dependencies": {
-    "@tapjs/processinfo": "^3.0.2",
+    "@tapjs/processinfo": "^3.1.0",
     "@tapjs/stack": "0.0.0-7",
     "@tapjs/test": "0.0.0-21",
     "async-hook-domain": "^4.0.1",

src/run/package.json

@@ -44,7 +44,7 @@
     "@tapjs/after": "0.0.0-21",
     "@tapjs/before": "0.0.0-21",
     "@tapjs/config": "2.0.0-22",
-    "@tapjs/processinfo": "^3.0.2",
+    "@tapjs/processinfo": "^3.1.0",
     "@tapjs/reporter": "0.0.0-23",
     "@tapjs/spawn": "0.0.0-21",
     "@tapjs/stdin": "0.0.0-21",

src/run/src/after.ts

@@ -19,5 +19,6 @@ export const runAfter = (
           )
         })
     )
+    return resolve(after)
   }
 }

src/run/src/before.ts

@@ -22,5 +22,6 @@ export const runBefore = (t: TAP, argv: string[], config: LoadedConfig) => {
           )
         })
     )
+    return resolve(before)
   }
 }

src/run/src/run.ts

@@ -49,6 +49,9 @@ export const run = async (args: string[], config: LoadedConfig) => {
   const saveList = await readSave(config)
   const map = await getCoverageMap(config)
 
+  const covExcludeFiles: (string | undefined)[] = []
+  let _TAPJS_PROCESSINFO_COV_EXCLUDE_FILES_: string | undefined = undefined
+
   return executeTestSuite(
     args,
     config,
@@ -92,8 +95,8 @@ export const run = async (args: string[], config: LoadedConfig) => {
     },
 
     async t => {
-      runBefore(t, argv, config)
-      runAfter(t, argv, config)
+      covExcludeFiles.push(runBefore(t, argv, config))
+      covExcludeFiles.push(runAfter(t, argv, config))
 
       // don't delete old coverage if only running subset of suites
       if (!config.get('changed') && !saveList.length) {
@@ -105,6 +108,13 @@ export const run = async (args: string[], config: LoadedConfig) => {
     },
 
     async (t, file, files, hasReporter) => {
+      if (!_TAPJS_PROCESSINFO_COV_EXCLUDE_FILES_) {
+        _TAPJS_PROCESSINFO_COV_EXCLUDE_FILES_ = [
+          ...covExcludeFiles.filter(f => typeof f === 'string'),
+          ...files.map(f => resolve(config.globCwd, f)),
+        ].join('\n')
+      }
+
       /* c8 ignore start */
       const stdio = hasReporter ? 'pipe' : 'inherit'
       /* c8 ignore end */
@@ -152,6 +162,7 @@ export const run = async (args: string[], config: LoadedConfig) => {
               ...env,
               _TAPJS_PROCESSINFO_COVERAGE_,
               _TAPJS_PROCESSINFO_COV_FILES_,
+              _TAPJS_PROCESSINFO_COV_EXCLUDE_FILES_,
             },
             name,
             cwd: config.globCwd,