diff --git a/__tests__/installer.test.ts b/__tests__/installer.test.ts
index 3bcd0aedc..f95c29878 100644
--- a/__tests__/installer.test.ts
+++ b/__tests__/installer.test.ts
@@ -10,12 +10,65 @@ process.env['RUNNER_TOOLSDIRECTORY'] = toolDir;
 process.env['RUNNER_TEMPDIRECTORY'] = tempDir;
 import * as installer from '../src/installer';
 
+const IS_WINDOWS = process.platform === 'win32';
+
 describe('installer tests', () => {
-  beforeAll(() => {});
   beforeAll(async () => {
     await io.rmRF(toolDir);
     await io.rmRF(tempDir);
+  }, 100000);
+
+  afterAll(async () => {
+    try {
+      await io.rmRF(toolDir);
+      await io.rmRF(tempDir);
+    } catch {
+      console.log('Failed to remove test directories');
+    }
+  }, 100000);
+
+  it('Acquires version of go if no matching version is installed', async () => {
+    await installer.getGo('1.10');
+    const goDir = path.join(toolDir, 'go', '1.10.0', os.arch());
+
+    expect(fs.existsSync(`${goDir}.complete`)).toBe(true);
+    if (IS_WINDOWS) {
+      expect(fs.existsSync(path.join(goDir, 'bin', 'go.exe'))).toBe(true);
+    } else {
+      expect(fs.existsSync(path.join(goDir, 'bin', 'go'))).toBe(true);
+    }
+  }, 100000);
+
+  it('Throws if no location contains correct go version', async () => {
+    let thrown = false;
+    try {
+      await installer.getGo('1000.0');
+    } catch {
+      thrown = true;
+    }
+    expect(thrown).toBe(true);
+  });
+
+  it('Uses version of go installed in cache', async () => {
+    const goDir: string = path.join(toolDir, 'go', '250.0.0', os.arch());
+    await io.mkdirP(goDir);
+    fs.writeFileSync(`${goDir}.complete`, 'hello');
+    // This will throw if it doesn't find it in the cache (because no such version exists)
+    await installer.getGo('250.0');
+    return;
   });
 
-  it('TODO - Add tests', async () => {});
+  it('Doesnt use version of go that was only partially installed in cache', async () => {
+    const goDir: string = path.join(toolDir, 'go', '251.0.0', os.arch());
+    await io.mkdirP(goDir);
+    let thrown = false;
+    try {
+      // This will throw if it doesn't find it in the cache (because no such version exists)
+      await installer.getGo('251.0');
+    } catch {
+      thrown = true;
+    }
+    expect(thrown).toBe(true);
+    return;
+  });
 });
diff --git a/lib/installer.js b/lib/installer.js
new file mode 100644
index 000000000..482900085
--- /dev/null
+++ b/lib/installer.js
@@ -0,0 +1,134 @@
+"use strict";
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
+    result["default"] = mod;
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+// Load tempDirectory before it gets wiped by tool-cache
+let tempDirectory = process.env['RUNNER_TEMPDIRECTORY'] || '';
+const core = __importStar(require("@actions/core"));
+const tc = __importStar(require("@actions/tool-cache"));
+const os = __importStar(require("os"));
+const path = __importStar(require("path"));
+const util = __importStar(require("util"));
+let osPlat = os.platform();
+let osArch = os.arch();
+if (!tempDirectory) {
+    let baseLocation;
+    if (process.platform === 'win32') {
+        // On windows use the USERPROFILE env variable
+        baseLocation = process.env['USERPROFILE'] || 'C:\\';
+    }
+    else {
+        if (process.platform === 'darwin') {
+            baseLocation = '/Users';
+        }
+        else {
+            baseLocation = '/home';
+        }
+    }
+    tempDirectory = path.join(baseLocation, 'actions', 'temp');
+}
+function getGo(version) {
+    return __awaiter(this, void 0, void 0, function* () {
+        // check cache
+        let toolPath;
+        toolPath = tc.find('go', normalizeVersion(version));
+        if (!toolPath) {
+            // download, extract, cache
+            toolPath = yield acquireGo(version);
+            core.debug('Go tool is cached under ' + toolPath);
+        }
+        setGoEnvironmentVariables(toolPath);
+        toolPath = path.join(toolPath, 'bin');
+        //
+        // prepend the tools path. instructs the agent to prepend for future tasks
+        //
+        core.addPath(toolPath);
+    });
+}
+exports.getGo = getGo;
+function acquireGo(version) {
+    return __awaiter(this, void 0, void 0, function* () {
+        //
+        // Download - a tool installer intimately knows how to get the tool (and construct urls)
+        //
+        let fileName = getFileName(version);
+        let downloadUrl = getDownloadUrl(fileName);
+        let downloadPath = null;
+        try {
+            downloadPath = yield tc.downloadTool(downloadUrl);
+        }
+        catch (error) {
+            core.debug(error);
+            throw `Failed to download version ${version}: ${error}`;
+        }
+        //
+        // Extract
+        //
+        let extPath = tempDirectory;
+        if (!extPath) {
+            throw new Error('Temp directory not set');
+        }
+        if (osPlat == 'win32') {
+            extPath = yield tc.extractZip(downloadPath);
+        }
+        else {
+            extPath = yield tc.extractTar(downloadPath);
+        }
+        //
+        // Install into the local tool cache - node extracts with a root folder that matches the fileName downloaded
+        //
+        const toolRoot = path.join(extPath, 'go');
+        version = normalizeVersion(version);
+        return yield tc.cacheDir(toolRoot, 'go', version);
+    });
+}
+function getFileName(version) {
+    const platform = osPlat == 'win32' ? 'windows' : osPlat;
+    const arch = osArch == 'x64' ? 'amd64' : '386';
+    const ext = osPlat == 'win32' ? 'zip' : 'tar.gz';
+    const filename = util.format('go%s.%s-%s.%s', version, platform, arch, ext);
+    return filename;
+}
+function getDownloadUrl(filename) {
+    return util.format('https://storage.googleapis.com/golang/%s', filename);
+}
+function setGoEnvironmentVariables(goRoot) {
+    core.exportVariable('GOROOT', goRoot);
+    const goPath = process.env['GOPATH'] || '';
+    const goBin = process.env['GOBIN'] || '';
+    // set GOPATH and GOBIN as user value
+    if (goPath) {
+        core.exportVariable('GOPATH', goPath);
+    }
+    if (goBin) {
+        core.exportVariable('GOBIN', goBin);
+    }
+}
+// This function is required to convert the version 1.10 to 1.10.0.
+// Because caching utility accept only sementic version,
+// which have patch number as well.
+function normalizeVersion(version) {
+    const versionPart = version.split('.');
+    if (versionPart[1] == null) {
+        //append minor and patch version if not available
+        return version.concat('.0.0');
+    }
+    else if (versionPart[2] == null) {
+        //append patch version if not available
+        return version.concat('.0');
+    }
+    return version;
+}
diff --git a/lib/setup-go.js b/lib/setup-go.js
index e777d3a69..05119970c 100644
--- a/lib/setup-go.js
+++ b/lib/setup-go.js
@@ -16,7 +16,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(require("@actions/core"));
-// import * as installer from './installer';
+const installer = __importStar(require("./installer"));
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
@@ -26,7 +26,7 @@ function run() {
             //
             const version = core.getInput('version');
             if (version) {
-                // await installer.getGo(version);
+                yield installer.getGo(version);
             }
             // TODO: setup proxy from runner proxy config
             // TODO: problem matchers registered
diff --git a/src/installer.ts b/src/installer.ts
new file mode 100644
index 000000000..cb3354891
--- /dev/null
+++ b/src/installer.ts
@@ -0,0 +1,130 @@
+// Load tempDirectory before it gets wiped by tool-cache
+let tempDirectory = process.env['RUNNER_TEMPDIRECTORY'] || '';
+import * as core from '@actions/core';
+import * as tc from '@actions/tool-cache';
+import * as os from 'os';
+import * as path from 'path';
+import * as util from 'util';
+
+let osPlat: string = os.platform();
+let osArch: string = os.arch();
+
+if (!tempDirectory) {
+  let baseLocation;
+  if (process.platform === 'win32') {
+    // On windows use the USERPROFILE env variable
+    baseLocation = process.env['USERPROFILE'] || 'C:\\';
+  } else {
+    if (process.platform === 'darwin') {
+      baseLocation = '/Users';
+    } else {
+      baseLocation = '/home';
+    }
+  }
+  tempDirectory = path.join(baseLocation, 'actions', 'temp');
+}
+
+export async function getGo(version: string) {
+  // check cache
+  let toolPath: string;
+  toolPath = tc.find('go', normalizeVersion(version));
+
+  if (!toolPath) {
+    // download, extract, cache
+    toolPath = await acquireGo(version);
+    core.debug('Go tool is cached under ' + toolPath);
+  }
+
+  setGoEnvironmentVariables(toolPath);
+
+  toolPath = path.join(toolPath, 'bin');
+  //
+  // prepend the tools path. instructs the agent to prepend for future tasks
+  //
+  core.addPath(toolPath);
+}
+
+async function acquireGo(version: string): Promise<string> {
+  //
+  // Download - a tool installer intimately knows how to get the tool (and construct urls)
+  //
+  let fileName: string = getFileName(version);
+  let downloadUrl: string = getDownloadUrl(fileName);
+  let downloadPath: string | null = null;
+  try {
+    downloadPath = await tc.downloadTool(downloadUrl);
+  } catch (error) {
+    core.debug(error);
+
+    throw `Failed to download version ${version}: ${error}`;
+  }
+
+  //
+  // Extract
+  //
+  let extPath: string = tempDirectory;
+  if (!extPath) {
+    throw new Error('Temp directory not set');
+  }
+
+  if (osPlat == 'win32') {
+    extPath = await tc.extractZip(downloadPath);
+  } else {
+    extPath = await tc.extractTar(downloadPath);
+  }
+
+  //
+  // Install into the local tool cache - node extracts with a root folder that matches the fileName downloaded
+  //
+  const toolRoot = path.join(extPath, 'go');
+  version = normalizeVersion(version);
+  return await tc.cacheDir(toolRoot, 'go', version);
+}
+
+function getFileName(version: string): string {
+  const platform: string = osPlat == 'win32' ? 'windows' : osPlat;
+  const arch: string = osArch == 'x64' ? 'amd64' : '386';
+  const ext: string = osPlat == 'win32' ? 'zip' : 'tar.gz';
+  const filename: string = util.format(
+    'go%s.%s-%s.%s',
+    version,
+    platform,
+    arch,
+    ext
+  );
+  return filename;
+}
+
+function getDownloadUrl(filename: string): string {
+  return util.format('https://storage.googleapis.com/golang/%s', filename);
+}
+
+function setGoEnvironmentVariables(goRoot: string) {
+  core.exportVariable('GOROOT', goRoot);
+
+  const goPath: string = process.env['GOPATH'] || '';
+  const goBin: string = process.env['GOBIN'] || '';
+
+  // set GOPATH and GOBIN as user value
+  if (goPath) {
+    core.exportVariable('GOPATH', goPath);
+  }
+  if (goBin) {
+    core.exportVariable('GOBIN', goBin);
+  }
+}
+
+// This function is required to convert the version 1.10 to 1.10.0.
+// Because caching utility accept only sementic version,
+// which have patch number as well.
+function normalizeVersion(version: string): string {
+  const versionPart = version.split('.');
+  if (versionPart[1] == null) {
+    //append minor and patch version if not available
+    return version.concat('.0.0');
+  } else if (versionPart[2] == null) {
+    //append patch version if not available
+    return version.concat('.0');
+  }
+  return version;
+}
diff --git a/src/setup-go.ts b/src/setup-go.ts
index b267d891a..cab3455f4 100644
--- a/src/setup-go.ts
+++ b/src/setup-go.ts
@@ -1,5 +1,5 @@
 import * as core from '@actions/core';
-// import * as installer from './installer';
+import * as installer from './installer';
 
 async function run() {
   try {
@@ -9,7 +9,7 @@ async function run() {
     //
     const version = core.getInput('version');
     if (version) {
-      // await installer.getGo(version);
+      await installer.getGo(version);
     }
 
     // TODO: setup proxy from runner proxy config