Add testhlper.go, a tool for helping with tests

In this case all it does is retrieves verification codes

.gitlab-ci.yml

@@ -13,3 +13,15 @@ build:signal-server:
     - docker push ${CI_REGISTRY_IMAGE}/signal-server:${CI_COMMIT_REF_SLUG}
     - docker push ${CI_REGISTRY_IMAGE}/signal-server:${VERSION}
     - echo "docker pull ${CI_REGISTRY_IMAGE}/signal-server:${VERSION}"
+
+build:testhelper:
+  tags:
+    - docker-builder
+  image: docker:latest
+  stage: build
+  script:
+    - docker login -u gitlab-ci-token -p ${CI_JOB_TOKEN} ${CI_REGISTRY}
+    - docker build -f testhelper.Dockerfile -t ${CI_REGISTRY_IMAGE}/testhelper:${CI_COMMIT_SHA:0:8} .
+    - docker tag ${CI_REGISTRY_IMAGE}/testhelper:${CI_COMMIT_SHA:0:8} ${CI_REGISTRY_IMAGE}/testhelper:${CI_COMMIT_REF_SLUG}
+    - docker push ${CI_REGISTRY_IMAGE}/testhelper:${CI_COMMIT_SHA:0:8}
+    - docker push ${CI_REGISTRY_IMAGE}/testhelper:${CI_COMMIT_REF_SLUG}

testhelper.Dockerfile

@@ -0,0 +1,7 @@
+FROM golang:latest
+COPY testhelper.go /
+RUN go build testhelper.go
+
+FROM scratch
+COPY --from=build /testhelper /testhelper
+ENTRYPOINT ["/testhelper"]

testhelper.go

@@ -0,0 +1,31 @@
+package main;
+
+import (
+	"net/http"
+	// "golang.org/x/net/html"
+	"database/sql"
+	_ "github.com/lib/pq"
+	"os"
+	"log"
+	"fmt"
+)
+
+func crash(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+func main() {
+	db, err := sql.Open("postgres", os.Getenv("DB"))
+	crash(err)
+
+	http.HandleFunc("/verification-code", func(w http.ResponseWriter, r *http.Request) {
+		account := r.PostFormValue("account")
+		var code string
+		err := db.QueryRow("SELECT verification_code FROM pending_accounts WHERE number = $1", account).Scan(&code)
+		crash(err)
+		fmt.Fprintf(w, "%s\n", code)
+	})
+	log.Fatal(http.ListenAndServe(":8082", nil))
+}