added cli-covarage tool and fixed more tests

.coveragerc.json

@@ -0,0 +1,26 @@
+{
+  "exclude": [
+    "**/node_modules/**",
+    "**/dist/**",
+    "**/build/**",
+    "**/coverage/**",
+    "**/*.test.ts",
+    "**/*.test.js",
+    "**/*.spec.ts",
+    "**/*.spec.js",
+    "**/test/**",
+    "**/tests/**",
+    "**/__tests__/**",
+    "**/__mocks__/**",
+    "**/setup.ts",
+    "**/setup.js"
+  ],
+  "reporters": ["terminal", "html"],
+  "thresholds": {
+    "lines": 80,
+    "functions": 80,
+    "branches": 80,
+    "statements": 80
+  },
+  "outputDir": "coverage"
+}