feat: add --failing (#15)

.github/workflows/ci.yml

@@ -28,6 +28,13 @@ jobs:
           install: false
           command: node . run --passing 3 --spec '**/spec.js'
 
+      - name: Check --failing 🧪
+        uses: cypress-io/github-action@v2
+        with:
+          # we have already installed all dependencies above
+          install: false
+          command: node . run --passing 1 --failing 1 --config integrationFolder=cypress/failing
+
       - name: Semantic Release 🚀
         uses: cycjimmy/semantic-release-action@v2
         env:

.gitignore

@@ -1 +1,2 @@
 node_modules/
+cypress/screenshots/

README.md

@@ -24,6 +24,8 @@ The rest of the arguments is parsed using [Cypress CLI method](https://on.cypres
 
 `--min-passing <N>` checks if the total number of passing tests is `>= <N>`
 
+`--failing <N>` checks if the total number of failing tests is `<N>`
+
 `--pending <N>` checks if the total number of pending tests is `<N>`
 
 ## Debugging

cypress/failing/spec.js

@@ -0,0 +1,11 @@
+/// <reference types="cypress" />
+
+describe('1 passing 1 failing', () => {
+  it('passes', () => {
+    cy.wait(100)
+  })
+
+  it('fails', () => {
+    expect(true).to.be.false
+  })
+})

index.js

@@ -15,6 +15,7 @@ const args = arg(
   {
     '--passing': Number, // number of total passing tests to expect
     '--min-passing': Number, // at least this number of passing tests
+    '--failing': Number, // number of failing tests to expect
     '--pending': Number, // number of pending tests to expect
   },
   {
@@ -26,20 +27,25 @@ debug('args %o', args)
 
 const isPassingSpecified = '--passing' in args
 const isMinPassingSpecified = '--min-passing' in args
+const isFailingSpecified = '--failing' in args
 const isPendingSpecified = '--pending' in args
 const noOptionsSpecified =
-  !isPassingSpecified && !isMinPassingSpecified && !isPendingSpecified
+  !isPassingSpecified &&
+  !isMinPassingSpecified &&
+  !isPendingSpecified &&
+  !isFailingSpecified
 
 debug('specified options %o', {
   isPassingSpecified,
   isMinPassingSpecified,
+  isFailingSpecified,
   isPendingSpecified,
   noOptionsSpecified,
 })
 
 if (noOptionsSpecified) {
   console.error('Need to specify at least one parameter:')
-  console.error('--passing or --min-passing or --pending')
+  console.error('--passing or --min-passing or --failing or --pending')
   process.exit(1)
 }
 
@@ -60,19 +66,22 @@ if (isMinPassingSpecified) {
   }
 }
 
-if (isPassingSpecified && isMinPassingSpecified) {
-  console.error('Cannot specify both --passing and --min-passing options')
-  process.exit(1)
+if (isFailingSpecified) {
+  if (!isValidPassing(args['--failing'])) {
+    console.error('expected a number of --failing tests', args['--failing'])
+    process.exit(1)
+  }
 }
 
-if (!isPassingSpecified && !isMinPassingSpecified) {
+if (isPassingSpecified && isMinPassingSpecified) {
   console.error('Cannot specify both --passing and --min-passing options')
   process.exit(1)
 }
 
 debug('params %o', {
   passing: args['--passing'],
   minPassing: args['--min-passing'],
+  failing: args['--failing'],
   pending: args['--pending'],
 })
 
@@ -122,9 +131,21 @@ parseArguments()
       }
       debug('test totals %o', totals)
 
-      if (totals.failed) {
-        console.error('%d test(s) failed', totals.failed)
-        process.exit(totals.failed)
+      if (isFailingSpecified) {
+        if (totals.failed !== args['--failing']) {
+          console.error(
+            'ERROR: expected %d failing tests, got %d',
+            args['--failing'],
+            totals.failed,
+          )
+          process.exit(1)
+        }
+      } else {
+        // any unexpected failed tests are bad
+        if (totals.failed) {
+          console.error('%d test(s) failed', totals.failed)
+          process.exit(totals.failed)
+        }
       }
 
       if (isPassingSpecified) {