test: add unit test for problem matcher

Author: nogic1008

__tests__/problem-matchers.json.test.ts

@@ -0,0 +1,32 @@
+import dotnetFormat from '../.github/dotnet-format.json';
+
+describe('/.github/dotnet-format.json tests', () => {
+  const problemMatcher = dotnetFormat.problemMatcher[0].pattern[0];
+
+  it.each([
+    [
+      "/home/runner/work/repo/Test.cs(18,6): error WHITESPACE: Fix whitespace formatting. Replace 12 characters with '\\n\\s\\s\\s\\s\\s\\s\\s\\s'. [/home/runner/work/repo/Test.csproj]",
+      '/home/runner/work/repo/Test.cs',
+      '18',
+      '6',
+      'error',
+      'WHITESPACE',
+      "Fix whitespace formatting. Replace 12 characters with '\\n\\s\\s\\s\\s\\s\\s\\s\\s'.",
+      '/home/runner/work/repo/Test.csproj'
+    ]
+  ])(
+    '"%s" returns {file: "%s", line: "%s", column: "%s", severity: "%s", code: "%s", message: "%s", fromPath: "%s"}',
+    (logOutput, file, line, column, severity, code, message, fromPath) => {
+      const regexp = new RegExp(problemMatcher.regexp);
+      const res = logOutput.match(regexp);
+
+      expect(res?.[problemMatcher.file]).toBe(file);
+      expect(res?.[problemMatcher.line]).toBe(line);
+      expect(res?.[problemMatcher.column]).toBe(column);
+      expect(res?.[problemMatcher.severity]).toBe(severity);
+      expect(res?.[problemMatcher.code]).toBe(code);
+      expect(res?.[problemMatcher.message]).toBe(message);
+      expect(res?.[problemMatcher.fromPath]).toBe(fromPath);
+    }
+  );
+});