Enforce Check Run API limits

README.md

@@ -61,8 +61,9 @@ jobs:
     #   jest-junit
     reporter: ''
 
-    # Enables code annotations with error message and stack trace captured during test execution
-    annotations: 'true'
+    # Limits number of created annotations with error message and stack trace captured during test execution.
+    # Must be less or equal to 50.
+    max-annotations: '10'
 
     # Set action as failed if test report contain any failed test
     fail-on-error: 'true'

action.yml

@@ -4,14 +4,16 @@ description: |
   Supports .NET (xUnit, NUnit, MSTest), Dart, Flutter and JavaScript (JEST).
 author: Michal Dorner <dorner.michal@gmail.com>
 inputs:
-  annotations:
-    description: Enables code annotations with error message and stack trace captured during test execution
-    required: true
-    default: 'true'
   fail-on-error:
     description: Set this action as failed if test report contain any failed test
     required: true
     default: 'true'
+  max-annotations:
+    description: |
+      Limits number of created annotations with error message and stack trace captured during test execution.
+      Must be less or equal to 50.
+    required: true
+    default: '10'
   name:
     description: Name of the check run
     required: true
@@ -19,7 +21,7 @@ inputs:
     description: |
       Coma separated list of paths to test reports
       Supports wildcards via [fast-glob](https://github.com/mrmlnc/fast-glob)
-      All matched files must be of same format
+      All matched result files must be of same format
     required: true
   reporter:
     description: |

src/main.ts

@@ -8,7 +8,7 @@ import {parseJestJunit} from './parsers/jest-junit/jest-junit-parser'
 import {FileContent, ParseOptions, ParseTestResult} from './parsers/parser-types'
 import {normalizeDirPath} from './utils/file-utils'
 import {listFiles} from './utils/git'
-import {getCheckRunSha} from './utils/github-utils'
+import {enforceCheckRunLimits, getCheckRunSha} from './utils/github-utils'
 
 async function run(): Promise<void> {
   try {
@@ -19,7 +19,7 @@ async function run(): Promise<void> {
 }
 
 async function main(): Promise<void> {
-  const annotations = core.getInput('annotations', {required: true}) === 'true'
+  const maxAnnotations = parseInt(core.getInput('max-annotations', {required: true}))
   const failOnError = core.getInput('fail-on-error', {required: true}) === 'true'
   const name = core.getInput('name', {required: true})
   const path = core.getInput('path', {required: true})
@@ -27,6 +27,11 @@ async function main(): Promise<void> {
   const token = core.getInput('token', {required: true})
   const workDirInput = core.getInput('working-directory', {required: false})
 
+  if (isNaN(maxAnnotations) || maxAnnotations < 0 || maxAnnotations > 50) {
+    core.setFailed(`Input parameter 'max-annotations' has invalid value`)
+    return
+  }
+
   if (workDirInput) {
     core.info(`Changing directory to ${workDirInput}`)
     process.chdir(workDirInput)
@@ -37,13 +42,14 @@ async function main(): Promise<void> {
   const sha = getCheckRunSha()
 
   // We won't need tracked files if we are not going to create annotations
+  const annotations = maxAnnotations > 0
   const trackedFiles = annotations ? await listFiles() : []
 
   const opts: ParseOptions = {
     name,
-    annotations,
     trackedFiles,
-    workDir
+    workDir,
+    annotations
   }
 
   const parser = getParser(reporter)
@@ -58,6 +64,8 @@ async function main(): Promise<void> {
   const result = await parser(files, opts)
   const conclusion = result.success ? 'success' : 'failure'
 
+  enforceCheckRunLimits(result, maxAnnotations)
+
   core.info(`Creating check run '${name}' with conclusion '${conclusion}'`)
   await octokit.checks.create({
     head_sha: sha,

src/utils/github-utils.ts

@@ -1,6 +1,9 @@
 import * as github from '@actions/github'
 import {EventPayloads} from '@octokit/webhooks'
 
+import {TestResult} from '../parsers/parser-types'
+import {ellipsis} from './markdown-utils'
+
 export function getCheckRunSha(): string {
   if (github.context.payload.pull_request) {
     const pr = github.context.payload.pull_request as EventPayloads.WebhookPayloadPullRequestPullRequest
@@ -9,3 +12,19 @@ export function getCheckRunSha(): string {
 
   return github.context.sha
 }
+
+export function enforceCheckRunLimits(result: TestResult, maxAnnotations: number): void {
+  const output = result.output
+  if (!output) {
+    return
+  }
+
+  // Limit number of created annotations
+  output.annotations?.splice(maxAnnotations + 1)
+
+  // Limit number of characters in annotation fields
+  for (const err of output.annotations ?? []) {
+    err.title = ellipsis(err.title || '', 255)
+    err.message = ellipsis(err.message, 65535)
+  }
+}

src/utils/markdown-utils.ts

@@ -34,3 +34,11 @@ export function tableEscape(content: ToString): string {
 export function fixEol(text?: string): string {
   return text?.replace(/\r/g, '') ?? ''
 }
+
+export function ellipsis(text: string, maxLength: number): string {
+  if (text.length <= maxLength) {
+    return text
+  }
+
+  return text.substr(0, maxLength - 3) + '...'
+}