chore(go): adding new compliance tests (#2655)

Additionally, correct code generation for variadic methods and
constructors, as previously the variadicity was simply ignored.

Partially implements #2634

packages/@jsii/go-runtime-test/build-tools/go-run.ts

@@ -0,0 +1,31 @@
+import { runCommand } from '@jsii/go-runtime/build-tools/_constants';
+import { spawnSync } from 'child_process';
+import { constants } from 'os';
+import { join } from 'path';
+import { argv, exit } from 'process';
+
+if (argv.length < 3) {
+  console.error(`Not enough arguments: ${argv[0]} ${argv[1]} <cmd> [args]`);
+  exit(1);
+}
+
+const [, , cmd, ...args] = argv;
+
+const result = spawnSync('go', ['env', 'GOPATH'], {
+  stdio: ['inherit', 'pipe', 'inherit'],
+});
+
+if (result.error) {
+  console.error('"go env GOPATH" failed:', result.error);
+  exit(-1);
+}
+
+if (result.status !== 0) {
+  console.error('"go env GOPATH" failed:', result.status ?? result.signal);
+  exit(
+    result.status ?? 128 + constants.signals[result.signal as NodeJS.Signals],
+  );
+}
+
+const gopath = result.stdout.toString('utf8').trim();
+runCommand(join(gopath, 'bin', cmd), args);

packages/@jsii/go-runtime-test/package.json

@@ -5,11 +5,12 @@
   "description": "",
   "scripts": {
     "build": "tsc --build && yarn gen:calc",
-    "fmt": "(cd project && go fmt ./...)",
-    "lint": "(cd project && go vet ./...)",
-    "test": "(cd project && go test ./...)",
+    "fmt": "yarn --silent go:run goimports -w .",
+    "lint": "cd project && go vet ./... && yarn --silent go:run golint ./...",
+    "test": "cd project && go test ./...",
     "lint:fix": "yarn lint && yarn fmt",
-    "gen:calc": "node build-tools/gen-calc.js"
+    "gen:calc": "node build-tools/gen-calc.js",
+    "go:run": "cd project && go mod download && node ../build-tools/go-run.js"
   },
   "keywords": [],
   "author": "",
@@ -21,5 +22,4 @@
     "fs-extra": "^9.1.0",
     "@jsii/go-runtime": "^0.0.0"
   }
-
 }

packages/@jsii/go-runtime-test/project/compliance.go

@@ -2,10 +2,11 @@ package tests
 
 import (
 	"encoding/json"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/suite"
 	"io/ioutil"
 	"strings"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/suite"
 )
 
 type ComplianceSuite struct {