fix(tfstated): add delete handler tests

cmd/tfstated/delete.go

@@ -1,8 +1,6 @@
 package main
 
 import (
-	"database/sql"
-	"errors"
 	"fmt"
 	"net/http"
 
@@ -17,15 +15,13 @@ func handleDelete(db *database.DB) http.Handler {
 			return
 		}
 
-		if err := db.DeleteState(r.URL.Path); err != nil {
-			if errors.Is(err, sql.ErrNoRows) {
-				_ = errorResponse(w, http.StatusNotFound,
-					fmt.Errorf("state path not found: %s", r.URL.Path))
-			} else {
-				_ = errorResponse(w, http.StatusInternalServerError, err)
-			}
-		} else {
+		if success, err := db.DeleteState(r.URL.Path); err != nil {
+			_ = errorResponse(w, http.StatusInternalServerError, err)
+		} else if success {
 			w.WriteHeader(http.StatusOK)
+		} else {
+			_ = errorResponse(w, http.StatusNotFound,
+				fmt.Errorf("state path not found: %s", r.URL.Path))
 		}
 	})
 }

cmd/tfstated/delete_test.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+	"testing"
+)
+
+func TestDelete(t *testing.T) {
+	tests := []struct {
+		method string
+		uri    *url.URL
+		body   io.Reader
+		expect string
+		status int
+		msg    string
+	}{
+		{"DELETE", &url.URL{Path: "/"}, nil, "", http.StatusBadRequest, "/"},
+		{"DELETE", &url.URL{Path: "/non_existent_delete"}, nil, "", http.StatusNotFound, "non existent"},
+		{"POST", &url.URL{Path: "/test_delete"}, strings.NewReader("the_test_delete"), "", http.StatusOK, "/test_delete"},
+		{"DELETE", &url.URL{Path: "/test_delete"}, nil, "", http.StatusOK, "/test_delete"},
+		{"DELETE", &url.URL{Path: "/test_delete"}, nil, "", http.StatusNotFound, "/test_delete"},
+	}
+	for _, tt := range tests {
+		runHTTPRequest(tt.method, tt.uri, tt.body, func(r *http.Response, err error) {
+			if err != nil {
+				t.Fatalf("failed %s with error: %+v", tt.method, err)
+			} else if r.StatusCode != tt.status {
+				t.Fatalf("%s %s should %s, got %s", tt.method, tt.msg, http.StatusText(tt.status), http.StatusText(r.StatusCode))
+			} else if tt.expect != "" {
+				if body, err := io.ReadAll(r.Body); err != nil {
+					t.Fatalf("failed to read body with error: %+v", err)
+				} else if strings.Compare(string(body), tt.expect) != 0 {
+					t.Fatalf("%s should have returned \"%s\", got %s", tt.method, tt.expect, string(body))
+				}
+			}
+		})
+	}
+}

pkg/database/states.go

@@ -5,9 +5,17 @@ import (
 	"fmt"
 )
 
-func (db *DB) DeleteState(name string) error {
-	_, err := db.Exec(`DELETE FROM states WHERE name = ?;`, name)
-	return err
+// returns true in case of successful deletion
+func (db *DB) DeleteState(name string) (bool, error) {
+	result, err := db.Exec(`DELETE FROM states WHERE name = ?;`, name)
+	if err != nil {
+		return false, err
+	}
+	n, err := result.RowsAffected()
+	if err != nil {
+		return false, err
+	}
+	return n == 1, nil
 }
 
 func (db *DB) GetState(name string) ([]byte, error) {