fix github workflow, add more tests to get 90%+ coverage

.github/main.workflow

@@ -1,4 +1,4 @@
-workflow "github-fresh" {
+workflow "Run github-fresh on every pull request update" {
   on = "pull_request"
   resolves = ["github-fresh"]
 }

main.go

@@ -14,6 +14,7 @@ import (
 
 // todo: docs
 // todo: GitHub action
+// todo: fix blank build vars when using go build
 // todo: add minimum age of pull request
 // todo: close old pull requests
 
@@ -74,9 +75,9 @@ func (ex *Executor) makeRequest(method string, url string) (res *http.Response,
 		return nil, err
 	}
 	req.Header.Add("Authorization", "token "+ex.token)
-	res, err = ex.client.Do(req)
-	if err != nil {
-		return nil, err
+	res, _ = ex.client.Do(req)
+	if res.StatusCode >= 400 {
+		return res, errors.New(res.Status)
 	}
 	return res, nil
 }

main_test.go

@@ -58,6 +58,27 @@ func TestGetDays(t *testing.T) {
 	}
 }
 
+func TestGetDry(t *testing.T) {
+	dry := getDry("true")
+
+	if dry != true {
+		t.Errorf("Expected parsed dry flag value to equal true")
+	}
+}
+
+func TestDeleteBranches(t *testing.T) {
+	ex := NewExecutor("token", false)
+	n, err := ex.deleteBranches("user", "repo", []string{"somebranch"})
+
+	if n != 0 {
+		t.Errorf("Expected deleted branches to equal 0 due to error")
+	}
+
+	if err == nil {
+		t.Errorf("Expected error due to misconfigured executor")
+	}
+}
+
 func TestDryRun(t *testing.T) {
 	ex := NewExecutor("token", true)
 	db, _ := ex.deleteBranches("user", "repo", []string{"branch"})