chore: add debugging to ast collection

Author: sheremet-va

src/worker/collect.ts

@@ -47,13 +47,29 @@ export interface FileInformation {
   definitions: LocalCallDefinition[]
 }
 
+const log = process.env.VITEST_VSCODE_DEBUG
+  ? (...args: any[]) => {
+    // eslint-disable-next-line no-console
+      console.info(...args)
+    }
+  : undefined
+
+const verbose = process.env.VITEST_VSCODE_DEBUG === 'verbose'
+  ? (...args: any[]) => {
+      // eslint-disable-next-line no-console
+      console.info(...args)
+    }
+  : undefined
+
 export async function astCollectTests(
   ctx: WorkspaceProject,
   filepath: string,
 ): Promise<null | FileInformation> {
   const request = await ctx.vitenode.transformRequest(filepath, filepath, 'web')
   // TODO: error cannot parse
+  const testFilepath = relative(ctx.config.root, filepath)
   if (!request) {
+    log?.('Cannot parse', testFilepath, '(vite didn\'t return anything)')
     return null
   }
   const ast = parse(request.code, {
@@ -62,7 +78,6 @@ export async function astCollectTests(
     allowHashBang: true,
     allowImportExportEverywhere: true,
   })
-  const testFilepath = relative(ctx.config.root, filepath)
   const file: ParsedFile = {
     filepath,
     type: 'suite',
@@ -77,6 +92,7 @@ export async function astCollectTests(
     file: null!,
   }
   file.file = file
+  log?.('Collecting', testFilepath)
   const definitions: LocalCallDefinition[] = []
   const getName = (callee: any): string | null => {
     if (!callee) {
@@ -108,14 +124,17 @@ export async function astCollectTests(
       const name = getName(callee)
       let unknown = false
       if (!name) {
+        verbose?.('Unknown call', callee)
         return
       }
       if (!['it', 'test', 'describe', 'suite'].includes(name)) {
+        verbose?.(`Skipping ${name} (unknown call)`)
         return
       }
       const property = callee?.property?.name
       let mode = !property || property === name ? 'run' : property
       if (mode === 'each') {
+        log?.('Skipping `.each` (support not implemented yet)', name)
         return
       }
 
@@ -156,6 +175,7 @@ export async function astCollectTests(
       if (mode === 'skipIf' || mode === 'runIf') {
         mode = 'skip'
       }
+      log?.('Found', name, message, `(${mode})`)
       definitions.push({
         start,
         end,
@@ -193,8 +213,20 @@ export async function astCollectTests(
           column: processedLocation.column,
         })
         if (originalLocation.column != null) {
+          verbose?.(
+            `Found location`,
+            `${processedLocation.column}:${processedLocation.line}`,
+            '->',
+            `${originalLocation.column}:${originalLocation.line}`,
+          )
           location = originalLocation
         }
+        else {
+          log?.('Cannot find original location', `${processedLocation.column}:${processedLocation.line}`)
+        }
+      }
+      else {
+        log?.('Cannot find original location', `${definition.start}`)
       }
       if (definition.type === 'suite') {
         const task: ParsedSuite = {
@@ -224,7 +256,7 @@ export async function astCollectTests(
         suite: latestSuite,
         file,
         mode,
-        context: {} as any, // not used in typecheck
+        context: {} as any, // not used on the server
         name: definition.name,
         end: definition.end,
         start: definition.start,
@@ -245,6 +277,17 @@ export async function astCollectTests(
     false,
     ctx.config.allowOnly,
   )
+  if (!file.tasks.length) {
+    file.result = {
+      state: 'fail',
+      errors: [
+        {
+          name: 'Error',
+          message: `No test suite found in file ${filepath}`,
+        },
+      ],
+    }
+  }
   return {
     file,
     parsed: request.code,
@@ -268,7 +311,7 @@ function mergeTemplateLiteral(node: TemplateLiteral): string {
   return result
 }
 
-export function createIndexMap(source: string) {
+function createIndexMap(source: string) {
   const map = new Map<number, { line: number; column: number }>()
   let index = 0
   let line = 1

src/worker/setupFile.ts

@@ -8,7 +8,7 @@ const workerState = globalThis.__vitest_worker__ as WorkerGlobalState
 
 const testFile = workerState.filepath!
 
-assert(testFile, () => 'Expected workerState.filepath to be set')
+assert(testFile, 'Expected workerState.filepath to be set')
 
 // don't run tests that are not watched if rerun was triggered - only collect those tests
 if (rerunTriggered) {