diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
new file mode 100644
index 0000000..191d028
--- /dev/null
+++ b/.github/workflows/test.yaml
@@ -0,0 +1,25 @@
+name: Unit test & integration test
+
+on:
+  pull_request:
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v3
+      # Setup .npmrc file to publish to GitHub Packages
+      - uses: actions/setup-node@v3
+        with:
+          node-version: "16.x"
+          registry-url: "https://npm.pkg.github.com"
+          # Defaults to the user or organization that owns the workflow file
+          scope: "@agoraio-extensions"
+
+      - name: Run unit test
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: bash tool/run_ut.sh
diff --git a/terra-core/__tests__/unit_test/path_resolver.test.ts b/terra-core/__tests__/unit_test/path_resolver.test.ts
new file mode 100644
index 0000000..5d14f6a
--- /dev/null
+++ b/terra-core/__tests__/unit_test/path_resolver.test.ts
@@ -0,0 +1,107 @@
+import fs from "fs";
+
+import path from "path";
+
+import os from 'os';
+
+import { requireModule, resolveModulePath, resolvePath } from "../../src/path_resolver";
+
+
+
+describe("path_resolver", () => {
+  const originalEnv = process.env;
+
+  let tmpDir: string = "";
+  let tmpPackageJsonPath: string = "";
+  let tmpNodeModulesDir: string = "";
+
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'terra-ut-'));
+    tmpPackageJsonPath = path.join(tmpDir, "package.json");
+
+    tmpNodeModulesDir = path.join(tmpDir, "node_modules");
+
+    fs.mkdirSync(tmpNodeModulesDir);
+
+    jest.resetModules();
+    process.env = {
+      ...originalEnv,
+      npm_package_json: tmpPackageJsonPath,
+    };
+  });
+
+  afterEach(() => {
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+    process.env = originalEnv;
+  });
+
+  describe("resolvePath", () => {
+    it("can resolve absolute path", () => {
+      expect(resolvePath("/a/b/c")).toEqual("/a/b/c");
+    });
+
+    it("can resolve absolute path with prefix", () => {
+      expect(resolvePath("/a/b/c", "/d/e/f")).toEqual("/a/b/c");
+    });
+
+    it("can resolve relative path", () => {
+      expect(resolvePath("a/b/c")).toEqual(path.resolve("a/b/c"));
+    });
+
+    it("can resolve relative path with prefix", () => {
+      expect(resolvePath("a/b/c", "/d/e/f")).toEqual("/d/e/f/a/b/c");
+    });
+
+    it("can resolve path with package schema", () => {
+      fs.mkdirSync(path.join(tmpNodeModulesDir, "aaa"));
+
+      let res = resolvePath("aaa:index.ts");
+
+      let expectRes = path.join(tmpNodeModulesDir, "aaa", "index.ts");
+
+      expect(res).toEqual(expectRes);
+    });
+  });
+
+  describe("resolveModulePath", () => {
+    it("can resolve module path", () => {
+      fs.mkdirSync(path.join(tmpNodeModulesDir, "aaa"));
+
+      let res = resolveModulePath("aaa");
+
+      let expectRes = path.join(tmpNodeModulesDir, "aaa");
+
+      expect(res).toEqual(expectRes);
+    });
+  });
+
+  describe("requireModule", () => {
+    it("can require module", () => {
+      let testPackageDir = path.join(tmpNodeModulesDir, "aaa");
+      fs.mkdirSync(testPackageDir);
+
+      let testPackageJsonPath = path.join(testPackageDir, "package.json");
+      let testPackageJsonContent = `
+{
+  "version": "0.1.2",
+  "main": "index.js"
+}
+`;
+      fs.writeFileSync(testPackageJsonPath, testPackageJsonContent);
+
+      let testPackageIndexJsPath = path.join(testPackageDir, "index.js");
+      let testPackageIndexJsContent = `
+module.exports = "aaa";
+`;
+
+      fs.writeFileSync(testPackageIndexJsPath, testPackageIndexJsContent);
+
+
+      let res = requireModule("aaa");
+
+      expect(res).toEqual("aaa");
+    });
+  });
+});
+
+
diff --git a/terra-core/jest.config.js b/terra-core/jest.config.js
new file mode 100644
index 0000000..99c689c
--- /dev/null
+++ b/terra-core/jest.config.js
@@ -0,0 +1,6 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  testPathIgnorePatterns: ['node_modules/', '.dist/'],
+  testRegex: '.*\\.test\\.ts$',
+};
diff --git a/terra-core/package.json b/terra-core/package.json
index 7189f91..6210aa4 100644
--- a/terra-core/package.json
+++ b/terra-core/package.json
@@ -7,10 +7,15 @@
   "version": "0.1.2",
   "main": "src/index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "jest"
   },
   "author": "",
   "license": "ISC",
+  "devDependencies": {
+    "@types/jest": "^29.5.1",
+    "jest": "^29.5.0",
+    "ts-jest": "^29.1.0"
+  },
   "dependencies": {
     "@types/node": "^20.5.9",
     "ts-node": "^10.9.1",
diff --git a/terra-core/src/path_resolver.ts b/terra-core/src/path_resolver.ts
index aba3907..d5aa98d 100644
--- a/terra-core/src/path_resolver.ts
+++ b/terra-core/src/path_resolver.ts
@@ -2,6 +2,8 @@ import fs from "fs";
 
 import path from "path";
 
+import os from 'os';
+
 /**
  * Resolve the schema: `<module_name>:<path>`, or absolute path, or relative path
  */
@@ -15,10 +17,10 @@ export function resolvePath(
     }
 
     if (prefixDirIfNotAbsolute == "") {
-      return p;
+      return path.resolve(p);
     }
 
-    return path.join(prefixDirIfNotAbsolute, p);
+    return path.resolve(path.join(prefixDirIfNotAbsolute, p));
   }
 
   // e.g., shared_configs:headers/rtc_4.2.3/shared_configs.yaml
@@ -30,14 +32,13 @@ export function resolvePath(
   let localModulePath = resolveModulePath(moduleName);
   let localPathInModule = path.join(localModulePath, pathInModule);
 
-  return localPathInModule;
+  return path.resolve(localPathInModule);
 }
 
 export function resolveModulePath(module: string): string {
   let currentPackageJsonPath = process.env.npm_package_json;
   let currentPackageNodeModuleDir = path.join(
-    currentPackageJsonPath as string,
-    "..",
+    path.dirname(currentPackageJsonPath as string),
     "node_modules"
   );
   console.assert(fs.existsSync(currentPackageNodeModuleDir));
@@ -45,7 +46,7 @@ export function resolveModulePath(module: string): string {
   let parserPackageDir = path.join(currentPackageNodeModuleDir, module);
   console.assert(fs.existsSync(parserPackageDir));
 
-  return parserPackageDir;
+  return path.resolve(parserPackageDir);
 }
 
 export function requireModule(module: string): any {
@@ -67,5 +68,5 @@ export function requireModule(module: string): any {
     parserPackageJsonIndexFilePath
   );
 
-  return require(parserPackageIndexFilePath);
+  return require(path.resolve(parserPackageIndexFilePath));
 }
diff --git a/terra-core/tsconfig.json b/terra-core/tsconfig.json
index a883dc9..9334641 100644
--- a/terra-core/tsconfig.json
+++ b/terra-core/tsconfig.json
@@ -26,12 +26,12 @@
 
     /* Modules */
     "module": "commonjs",                                /* Specify what module code is generated. */
-    "rootDir": "./src",                                  /* Specify the root folder within your source files. */
+    // "rootDir": "./src",                                  /* Specify the root folder within your source files. */
     // "moduleResolution": "node10",                     /* Specify how TypeScript looks up a file from a given module specifier. */
     // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
     // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
-    // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
-    // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */
+    "rootDirs": ["./src", "__tests__/unit_test"],        /* Allow multiple folders to be treated as one when resolving modules. */
+    "typeRoots": ["./node_modules/@types"],              /* Specify multiple folders that act like './node_modules/@types'. */
     // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
     // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
     // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */
diff --git a/terra/__tests__/unit_test/renderers/dump_json_renderer.test.ts b/terra/__tests__/unit_test/renderers/dump_json_renderer.test.ts
index 83bda91..d986d44 100644
--- a/terra/__tests__/unit_test/renderers/dump_json_renderer.test.ts
+++ b/terra/__tests__/unit_test/renderers/dump_json_renderer.test.ts
@@ -4,7 +4,10 @@ import path from 'path';
 
 import { ParseResult, TerraContext } from '@agoraio-extensions/terra-core';
 
-import { dumpJsonRenderer, terraAstJsonFileName } from './dump_json_renderer';
+import {
+  dumpJsonRenderer,
+  terraAstJsonFileName,
+} from '../../../src/renderers/dump_json_renderer';
 
 interface FakeNode {
   name: string;
diff --git a/tool/run_ut.sh b/tool/run_ut.sh
new file mode 100644
index 0000000..8eb592a
--- /dev/null
+++ b/tool/run_ut.sh
@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -e
+set -x
+
+# Find all the `__tests__`` directories to ensure there're test cases there
+for d in **/*__tests__*; do 
+    PACKAGE_DIR=$(realpath ${d}/..)
+    echo "Running tests in ${PACKAGE_DIR}"; 
+    pushd $PACKAGE_DIR
+        npm install
+        npm run test
+    popd
+done
+