Add PHPUnit problem matcher

.github/matchers/phpunit.json

@@ -0,0 +1,24 @@
+{
+  "problemMatcher": [
+    {
+      "owner": "phpunit",
+      "pattern": [
+        {
+          "regexp": "^\\d+\\)\\s.*$"
+        },
+        {
+          "regexp": "^(.*)$",
+          "message": 1
+        },
+        {
+          "regexp": "^\\s*$"
+        },
+        {
+          "regexp": "^(.*):(\\d+)$",
+          "file": 1,
+          "line": 2
+        }
+      ]
+    }
+  ]
+}

__tests__/install.test.ts

@@ -1,4 +1,6 @@
 import * as install from '../src/install';
+import * as matchers from '../src/matchers';
+import * as path from 'path';
 
 /**
  * Mock install.ts
@@ -143,4 +145,34 @@ describe('Install', () => {
     expect(script).toContain('set coverage driver');
     expect(script).toContain('sh script.sh 7.3 ' + __dirname);
   });
+
+  describe('Matchers', () => {
+    let originalLogMethod: any;
+    let outputData: any[] = [];
+
+    beforeAll(() => {
+      originalLogMethod = console.log;
+      console['log'] = jest.fn(inputs => outputData.push(inputs));
+    });
+
+    beforeEach(() => {
+      outputData = [];
+    });
+
+    afterAll(() => {
+      console['log'] = originalLogMethod;
+    });
+
+    it('Add matchers', async () => {
+      matchers.addMatchers();
+
+      expect(outputData).toEqual([
+        `##[add-matcher]${path.join(
+          __dirname,
+          '..',
+          '.github/matchers/phpunit.json'
+        )}`
+      ]);
+    });
+  });
 });

src/install.ts

@@ -4,6 +4,7 @@ import * as config from './config';
 import * as coverage from './coverage';
 import * as extensions from './extensions';
 import * as utils from './utils';
+import {addMatchers} from './matchers';
 
 /**
  * Build the script
@@ -63,6 +64,8 @@ export async function run(): Promise<void> {
         );
         break;
     }
+
+    addMatchers();
   } catch (error) {
     core.setFailed(error.message);
   }

src/matchers.ts

@@ -0,0 +1,10 @@
+import * as path from 'path';
+
+/**
+ * Add matches using the Actions Toolkit problem matchers syntax
+ * https://github.com/actions/toolkit/blob/master/docs/problem-matchers.md
+ */
+export function addMatchers(): void {
+  const matchersPath = path.join(__dirname, '..', '.github/matchers');
+  console.log(`##[add-matcher]${path.join(matchersPath, 'phpunit.json')}`);
+}