Tests for Restricting user to use yarn v4

npm_test.go

@@ -714,6 +714,45 @@ func TestYarn(t *testing.T) {
 	inttestutils.DeleteBuild(serverDetails.ArtifactoryUrl, tests.YarnBuildName, artHttpDetails)
 }
 
+func TestYarnUpgradeToV4(t *testing.T) {
+	initNpmTest(t)
+	defer cleanNpmTest(t)
+
+	// Temporarily change the cache folder to a temporary folder - to make sure the cache is clean and dependencies will be downloaded from Artifactory
+	tempDirPath, createTempDirCallback := coretests.CreateTempDirWithCallbackAndAssert(t)
+	defer createTempDirCallback()
+
+	testDataSource := filepath.Join(filepath.FromSlash(tests.GetTestResourcesPath()), "yarn")
+	testDataTarget := filepath.Join(tempDirPath, tests.Out, "yarn")
+	assert.NoError(t, biutils.CopyDir(testDataSource, testDataTarget, true, nil))
+
+	yarnProjectPath := filepath.Join(testDataTarget, "yarnproject")
+	assert.NoError(t, createConfigFileForTest([]string{yarnProjectPath}, tests.NpmRemoteRepo, "", t, project.Yarn, false))
+
+	wd, err := os.Getwd()
+	assert.NoError(t, err, "Failed to get current dir")
+	chdirCallback := clientTestUtils.ChangeDirWithCallback(t, wd, yarnProjectPath)
+	defer chdirCallback()
+	cleanUpYarnGlobalFolder := clientTestUtils.SetEnvWithCallbackAndAssert(t, "YARN_GLOBAL_FOLDER", tempDirPath)
+	defer cleanUpYarnGlobalFolder()
+
+	// Add "localhost" to http whitelist
+	yarnExecPath, err := exec.LookPath("yarn")
+	assert.NoError(t, err)
+	// Get original http white list config
+	origWhitelist, err := yarn.ConfigGet("unsafeHttpWhitelist", yarnExecPath, true)
+	assert.NoError(t, err)
+	assert.NoError(t, yarn.ConfigSet("unsafeHttpWhitelist", "[\"localhost\"]", yarnExecPath, true))
+	defer func() {
+		// Restore original whitelist config
+		assert.NoError(t, yarn.ConfigSet("unsafeHttpWhitelist", origWhitelist, yarnExecPath, true))
+	}()
+
+	jfrogCli := coretests.NewJfrogCli(execMain, "jfrog", "")
+	err = jfrogCli.Exec("yarn", "set", "version", "4.0.1")
+	assert.Error(t, err)
+}
+
 // Checks if the expected dependencies match the actual dependencies. Only the dependencies' IDs and scopes (not more than one scope) are compared.
 func equalDependenciesSlices(t *testing.T, expectedDependencies []expectedDependency, actualDependencies []buildinfo.Dependency) {
 	assert.Equal(t, len(expectedDependencies), len(actualDependencies))