test and implementation for dynamically-created Procfile support

bin/compile

@@ -153,6 +153,8 @@ head "Checking startup method"
 
 if [ "$start_method" == "Procfile" ]; then
   info "Found Procfile"
+elif test -f $build_dir/Procfile; then
+  info "Procfile created during build"
 elif [ "$start_method" == "npm start" ]; then
   info "No Procfile; Adding 'web: npm start' to new Procfile"
   echo "web: npm start" > $build_dir/Procfile

bin/test

@@ -7,6 +7,12 @@ testDetectWithPackageJson() {
   assertCapturedSuccess
 }
 
+testDetectWithServer() {
+  detect "server-present-only"
+  assertCaptured "Node.js"
+  assertCapturedSuccess
+}
+
 testDetectWithoutPackageJson() {
   detect "no-package-json"
   assertCapturedError 1 ""
@@ -143,6 +149,13 @@ testProcfileAbsentNpmStartAbsent() {
   assertCapturedSuccess
 }
 
+testDynamicProcfile() {
+  compile "dynamic-procfile"
+  assertCaptured "Procfile created during build"
+  assertFileContains "web: node index.js customArg" "${compile_dir}/Procfile"
+  assertCapturedSuccess
+}
+
 testProcfileAbsentServerPresent() {
   compile "procfile-absent-server-present"
   assertCaptured "Start mechanism:     server.js"

test/dynamic-procfile/package.json

+{
+  "name": "node-buildpack-test-app",
+  "version": "0.0.1",
+  "description": "node buildpack integration test app",
+  "repository" : {
+    "type" : "git",
+    "url" : "http://github.com/example/example.git"
+  },
+  "dependencies": {
+    "hashish": "*"
+  },
+  "engines": {
+    "node": "0.10.x"
+  },
+  "scripts": {
+    "postinstall": "echo 'web: node index.js customArg' > Procfile"
+  }
+}