test: check if dot is installed

README.md

@@ -133,15 +133,15 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - windows-2019
+          - windows-2022
           - ubuntu-20.04
-          - macos-10.15
+          - macos-11
         compiler:
           - llvm
           - gcc
           # you can specify the version after `-` like `llvm-13.0.0`.
         include:
-          - os: "windows-latest"
+          - os: "windows-2022"
             compiler: "msvc"
     steps:
       - uses: actions/checkout@v2

src/doxygen/__tests__/doxygen.test.ts

@@ -10,10 +10,11 @@ describe("setup-doxygen", () => {
     directory = await setupTmpDir("doxygen")
   })
 
-  it("should setup doxygen", async () => {
+  it("should setup doxygen and dot", async () => {
     const installInfo = await setupDoxygen(getVersion("doxygen", undefined), directory, process.arch)
 
     await testBin("doxygen", ["--version"], (installInfo as InstallationInfo | undefined)?.binDir)
+    await testBin("dot", ["-V"])
   })
 
   afterAll(async () => {