don't follow redirects (#50)

Some requests make redirect as result and sometimes we need just
check if url is valid, but don't have to follow it

runner/previous_result_test.go

@@ -4,12 +4,12 @@ import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
+	"path/filepath"
 	"testing"
 )
 
 const (
-	testDir = "testdata"
-	body    = "bla"
+	body = "bla"
 )
 
 func Test_PreviousResult(t *testing.T) {
@@ -19,7 +19,7 @@ func Test_PreviousResult(t *testing.T) {
 
 	RunWithTesting(t, &RunWithTestingParams{
 		Server:   srv,
-		TestsDir: testDir,
+		TestsDir: filepath.Join("testdata", "previous-result"),
 	})
 }
 

runner/request.go

@@ -23,7 +23,13 @@ func newClient() (*http.Client, error) {
 		}
 		transport.Proxy = http.ProxyURL(proxyUrl)
 	}
-	return &http.Client{Transport: transport}, nil
+
+	return &http.Client{
+		Transport: transport,
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+	}, nil
 }
 
 func newRequest(host string, test models.TestInterface) (*http.Request, error) {

runner/runner.go

@@ -150,7 +150,7 @@ func (r *Runner) executeTest(v models.TestInterface, client *http.Client) (*mode
 	if err != nil {
 		return nil, err
 	}
-	resp.Body.Close()
+	_ = resp.Body.Close()
 
 	bodyStr := string(body)
 

runner/runner_test.go

@@ -0,0 +1,24 @@
+package runner
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"path/filepath"
+	"testing"
+)
+
+func TestDontFollowRedirects(t *testing.T) {
+	srv := testServerRedirect()
+	defer srv.Close()
+
+	RunWithTesting(t, &RunWithTestingParams{
+		Server:   srv,
+		TestsDir: filepath.Join("testdata", "dont-follow-redirects"),
+	})
+}
+
+func testServerRedirect() *httptest.Server {
+	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		http.Redirect(w, r, "/redirect-url", http.StatusFound)
+	}))
+}

runner/testdata/dont-follow-redirects/with-redirect.yaml

@@ -0,0 +1,4 @@
+- name: "dont-follow-redirects"
+  method: GET
+  response:
+    302: "$matchRegexp(redirect-url)"