Add CI badge to README and update github action

.github/workflows/tests.yml

@@ -1,25 +1,26 @@
 name: smalltalkCI
 
-on:
-  - push
-  - workflow_dispatch
+on: [push, pull_request, workflow_dispatch]
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
+        os: [ubuntu-latest, macos-latest]
         smalltalk:
           #- Squeak64-trunk  # to be reenabled soon
           - Squeak64-5.3
-    name: Test ${{ matrix.smalltalk }}
-    env:
-      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          #- Squeak64-5.2
+    name: Test ${{ matrix.smalltalk }} on ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
       - uses: hpi-swa/setup-smalltalkCI@v1
         with:
-          smalltalk-version: ${{ matrix.smalltalk }}
+          smalltalk-image: ${{ matrix.smalltalk }}
       - run: smalltalkci -s ${{ matrix.smalltalk }}
         shell: bash
         timeout-minutes: 15
+        env:
+          # for uploading coverage reports
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -1,15 +1,19 @@
 # Poppy Print
 
+![CI](https://github.com/hpi-swa-teaching/poppy-print/actions/workflows/tests.yml/badge.svg)
+
 A small, opinionated pretty printer for Squeak/Smalltalk. Tested with Squeak6-trunk and Squeak5.3.
 
 > NOTE: this is a beta release. The printer may accidentally produce malformed code at this point. Please report any misbehavior you notice.
 
 ### Install
+
 ```smalltalk
 Metacello new baseline: 'PoppyPrint'; repository: 'github://tom95/poppy-print/packages'; load.
 ```
 
 If you want to use Poppy Print instead of the default pretty printer, run:
+
 ```smalltalk
 Behavior compile: 'prettyPrinterClass ^ PPFormatter'.
 " undo: "