Fix and test check for MSVC setup.

__tests__/msvc.test.ts

@@ -0,0 +1,36 @@
+import * as path from 'path'
+import {expect, test} from '@jest/globals'
+import {needsWindowsEnvironmentSetup} from '../src/msvc'
+import {VERSION_DEV, VERSION_LATEST} from '../src/constants'
+
+process.env['RUNNER_TOOL_CACHE'] = path.join(__dirname, 'TOOL_CACHE')
+process.env['RUNNER_TEMP'] = path.join(__dirname, 'TEMP')
+
+test('decide whether Window env must be set up for GraalVM for JDK', async () => {
+  for (var javaVersion of [
+    '17',
+    '17.0.8',
+    '17.0',
+    '21',
+    '22',
+    '22-ea',
+    '23-ea',
+    VERSION_DEV
+  ]) {
+    expect(needsWindowsEnvironmentSetup(javaVersion, '', true)).toBe(false)
+  }
+})
+
+test('decide whether Window env must be set up for legacy GraalVM', async () => {
+  for (var combination of [
+    ['7', '22.3.0'],
+    ['17', '22.3'],
+    ['7', '22.3'],
+    ['7', VERSION_DEV],
+    ['17', VERSION_LATEST]
+  ]) {
+    expect(
+      needsWindowsEnvironmentSetup(combination[0], combination[1], false)
+    ).toBe(combination[1] !== VERSION_DEV)
+  }
+})