Refactor: split test code into files (#47)

Author: int128

e2e_test/client/client.go

@@ -0,0 +1,35 @@
+package client
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+)
+
+var certPool = x509.NewCertPool()
+
+func init() {
+	data, err := ioutil.ReadFile("testdata/ca.pem")
+	if err != nil {
+		panic(err)
+	}
+	if !certPool.AppendCertsFromPEM(data) {
+		panic("could not append certificate data")
+	}
+}
+
+func Get(url string) (int, string, error) {
+	client := http.Client{Transport: &http.Transport{TLSClientConfig: &tls.Config{RootCAs: certPool}}}
+	resp, err := client.Get(url)
+	if err != nil {
+		return 0, "", fmt.Errorf("could not send a request: %w", err)
+	}
+	defer resp.Body.Close()
+	b, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return resp.StatusCode, "", fmt.Errorf("could not read response body: %w", err)
+	}
+	return resp.StatusCode, string(b), nil
+}