test: tighten node_10_spec EOL warning assertion to match full message

Author: colincasey

lib/binaries.sh

@@ -104,7 +104,7 @@ install_nodejs() {
     fi
 
     if [[ "$eol" == "true" ]]; then
-      output::warn <<-EOF
+      output::warning <<-EOF
 				Node.js $version is now End-of-Life (EOL). It no longer receives security
 				updates, bug fixes, or support from the Node.js project and is no longer
 				supported on Heroku.

spec/ci/node_10_spec.rb

@@ -8,7 +8,16 @@
 
     it "should deploy successfully with EOL warning" do
       app.deploy do |app|
-        expect(app.output).to include("End-of-Life")
+        expect(clean_output(app.output)).to include(<<~OUTPUT)
+          remote:  !     Node.js 10.24.1 is now End-of-Life (EOL). It no longer receives security
+          remote:  !     updates, bug fixes, or support from the Node.js project and is no longer
+          remote:  !     supported on Heroku.
+          remote:  !
+          remote:  !     In a future buildpack release, this warning will become a build error. Please
+          remote:  !     upgrade to a supported version as soon as possible to avoid build failures.
+          remote:  !
+          remote:  !     https://devcenter.heroku.com/articles/nodejs-support#supported-node-js-versions
+        OUTPUT
         expect(successful_body(app).strip).to eq("Hello, world!")
         expect(clean_output(app.output)).to include(<<~OUTPUT)
           remote: -----> Installing binaries