Add tests that fail without this change and pass with it

__tests__/setup-go.test.ts

@@ -427,6 +427,61 @@ describe('setup-go', () => {
     );
   });
 
+  it('adds GOBIN to PATH when go-version specified', async () => {
+    inputs['go-version'] = '1.13.0';
+
+    let toolPath = path.normalize('/cache/go/1.13.0/x64');
+    findSpy.mockImplementation(() => toolPath);
+
+    whichSpy.mockImplementation(async () => {
+      return '/usr/local/go/bin/go';
+    });
+
+    execSpy.mockImplementation(() => {
+      return '/Users/testuser/go';
+    });
+
+    mkdirpSpy.mockImplementation(async () => { });
+    existsSpy.mockImplementation(path => {
+      return false;
+    });
+
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith(`Setup go stable version spec 1.13.0`);
+    expect(logSpy).toHaveBeenCalledWith(`Added go to the path`);
+    expect(logSpy).toHaveBeenCalledWith(`Added GOBIN to the path`);
+
+    let expPath = "/Users/testuser/go/bin";
+    expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+  });
+
+  it('adds GOBIN to PATH when go-version not specified', async () => {
+    let toolPath = path.normalize('/cache/go/1.13.0/x64');
+    findSpy.mockImplementation(() => toolPath);
+
+    whichSpy.mockImplementation(async () => {
+      return '/usr/local/go/bin/go';
+    });
+
+    execSpy.mockImplementation(() => {
+      return '/Users/testuser/go';
+    });
+
+    mkdirpSpy.mockImplementation(async () => { });
+    existsSpy.mockImplementation(path => {
+      return false;
+    });
+
+    await main.run();
+
+    expect(logSpy).toHaveBeenCalledWith(`Setup go stable version spec undefined`);
+    expect(logSpy).toHaveBeenCalledWith(`Added GOBIN to the path`);
+
+    let expPath = "/Users/testuser/go/bin";
+    expect(cnSpy).toHaveBeenCalledWith(`::add-path::${expPath}${osm.EOL}`);
+  });
+
   it('does not add BIN if go is not in path', async () => {
     whichSpy.mockImplementation(async () => {
       return '';

dist/index.js

@@ -1511,6 +1511,9 @@ function run() {
             // add gobin to path
             let added = yield addBinToPath();
             core.debug(`add bin ${added}`);
+            if (added) {
+                core.info('Added GOBIN to the path');
+            }
             // add problem matchers
             const matchersPath = path_1.default.join(__dirname, '..', 'matchers.json');
             core.info(`##[add-matcher]${matchersPath}`);

src/main.ts

@@ -36,6 +36,9 @@ export async function run() {
     // add gobin to path
     let added = await addBinToPath();
     core.debug(`add bin ${added}`);
+    if (added) {
+      core.info('Added GOBIN to the path');
+    }
 
     // add problem matchers
     const matchersPath = path.join(__dirname, '..', 'matchers.json');