Adds tests that exercise linker.

Adds tests that exercise linker, related to upstream changes:
a0a82e1

[#105470778]

cf_spec/fixtures/go1.4.2_app_using_ldflags/src/go_app/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Rasheed Abdul-Aziz
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

cf_spec/fixtures/go1.4.2_app_using_ldflags/src/go_app/Procfile

@@ -0,0 +1 @@
+web: go-online

cf_spec/fixtures/go1.4.2_app_using_ldflags/src/go_app/README.md

@@ -0,0 +1,10 @@
+go-online
+=========
+
+Sample go web app using the GoLang example: http://golang.org/doc/articles/wiki/final.go
+
+to run
+======
+
+$ go build site.go
+$ PORT=3000 ./site

cf_spec/fixtures/go1.4.2_app_using_ldflags/src/go_app/manifest.yml

@@ -0,0 +1,4 @@
+---
+  env:
+    GO_LINKER_SYMBOL: main.linker_flag
+    GO_LINKER_VALUE: flag_linked

cf_spec/fixtures/go1.4.2_app_using_ldflags/src/go_app/site.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+var linker_flag string
+
+func main() {
+	http.HandleFunc("/", hello)
+	fmt.Println("listening...")
+	err := http.ListenAndServe(":"+os.Getenv("PORT"), nil)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func hello(res http.ResponseWriter, req *http.Request) {
+	fmt.Fprintln(res, linker_flag)
+	fmt.Fprintln(res, "done")
+}

cf_spec/fixtures/go1.5_app_using_ldflags/src/go_app/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Rasheed Abdul-Aziz
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

cf_spec/fixtures/go1.5_app_using_ldflags/src/go_app/Procfile

@@ -0,0 +1 @@
+web: go-online

cf_spec/fixtures/go1.5_app_using_ldflags/src/go_app/README.md

@@ -0,0 +1,10 @@
+go-online
+=========
+
+Sample go web app using the GoLang example: http://golang.org/doc/articles/wiki/final.go
+
+to run
+======
+
+$ go build site.go
+$ PORT=3000 ./site

cf_spec/fixtures/go1.5_app_using_ldflags/src/go_app/manifest.yml

@@ -0,0 +1,4 @@
+---
+  env:
+    GO_LINKER_SYMBOL: main.linker_flag
+    GO_LINKER_VALUE: flag_linked

cf_spec/fixtures/go1.5_app_using_ldflags/src/go_app/site.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+var linker_flag string
+
+func main() {
+	http.HandleFunc("/", hello)
+	fmt.Println("listening...")
+	err := http.ListenAndServe(":"+os.Getenv("PORT"), nil)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func hello(res http.ResponseWriter, req *http.Request) {
+	fmt.Fprintln(res, linker_flag)
+	fmt.Fprintln(res, "done")
+}

cf_spec/integration/deploy_a_go_app_spec.rb

@@ -77,6 +77,30 @@
         expect(app.host).not_to have_internet_traffic
       end
     end
+
+    context 'a go app using ldflags' do
+      context 'with version 1.5 or greater' do
+        let(:app_name) { 'go1.5_app_using_ldflags/src/go_app' }
+
+        specify do
+          expect(app).to be_running
+          browser.visit_path('/')
+          expect(browser).to have_body('flag_linked')
+          expect(app.host).not_to have_internet_traffic
+        end
+      end
+      context 'with version 1.4.2 or less' do
+        let(:app_name) { 'go1.4.2_app_using_ldflags/src/go_app' }
+
+        specify do
+          expect(app).to be_running
+          browser.visit_path('/')
+          expect(browser).to have_body('flag_linked')
+          expect(app.host).not_to have_internet_traffic
+        end
+      end
+    end
+
   end
 
   context 'without cached buildpack dependencies', :uncached do
@@ -138,6 +162,27 @@
         expect(browser).to have_body('hello, heroku')
       end
     end
+
+    context 'a go app using ldflags' do
+      context 'with version 1.5 or greater' do
+        let(:app_name) { 'go1.5_app_using_ldflags/src/go_app' }
+
+        specify do
+          expect(app).to be_running
+          browser.visit_path('/')
+          expect(browser).to have_body('flag_linked')
+        end
+      end
+      context 'with version 1.4.2 or less' do
+        let(:app_name) { 'go1.4.2_app_using_ldflags/src/go_app' }
+
+        specify do
+          expect(app).to be_running
+          browser.visit_path('/')
+          expect(browser).to have_body('flag_linked')
+        end
+      end
+    end
   end
 
   context 'deprecated heroku example' do