Migrate from mocha + nyc to jest (#248)

* Removed Mocha and nyc dependencies alongside with related config files. Introduced jest and adapted tests. Updated typescript to latest (with some other development dependencies).

* Reduce line coverage threshold by 1% due to coverage tool differences

* Add "text" coverage reporter

.github/workflows/node.js.yaml

@@ -47,9 +47,7 @@ jobs:
           find $SOL_AST_COMPILER_CACHE -name '*v0.5.17*' -delete
 
       - name: Test and generate coverage report
-        run: |
-          npm test
-          npm run coverage
+        run: npm test
 
       - name: Upload coverage to CodeCov
         uses: codecov/codecov-action@v3

jest.config.json

@@ -0,0 +1,30 @@
+{
+    "roots": [""],
+    "testMatch": ["**/test/**/*.spec.ts"],
+    "moduleDirectories": ["node_modules"],
+    "transform": {
+        "^.+\\.ts$": "ts-jest"
+    },
+
+    "testTimeout": 200000,
+    "verbose": true,
+
+    "coveragePathIgnorePatterns": [
+        "/node_modules/",
+        "/test/",
+        "/coverage/",
+        "/docs/",
+        "/.compiler_cache/",
+        "file_level_definitions_parser*.ts",
+        "comments_parser*.ts"
+    ],
+    "coverageReporters": ["text", "text-summary", "lcov"],
+    "coverageThreshold": {
+        "global": {
+            "statements": 90,
+            "branches": 85,
+            "functions": 90,
+            "lines": 94
+        }
+    }
+}