Add Register()

This function creates a new user and sets the username and bcrypt-hashed
password.

1 files changed, 57 insertions, 0 deletions

diff --git a/password_test.go b/password_test.go
new file mode 100644
index 0000000..f540cc4
--- /dev/null
+++ b/password_test.go
@@ -0,0 +1,57 @@
+package main
+
+import (
+	"testing"
+
+	"golang.org/x/crypto/bcrypt"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+var passwords = []struct {
+	description string
+	username    string
+	password    string
+}{
+	{"basic", "testuser", "mypassword"},
+	{"password-characterset", "testuser", "mypSDFäÖ$🚧"},
+	{"user-characterset", "mypSDFäÖ$🚧", "mypassword"},
+}
+
+func TestRegister(t *testing.T) {
+	for _, p := range passwords {
+		t.Run(p.description, func(t *testing.T) {
+			db, _ := emptyDB(t)
+
+			err := MigrateToLatest(db)
+			if err != nil {
+				t.Fatalf("Could not execute function to test: %v", err)
+			}
+
+			err = Register(db, p.username, p.password)
+			if err != nil {
+				t.Fatalf("Could not register user: %v", err)
+			}
+
+			row := db.QueryRow(
+				`SELECT password_bcrypt FROM users WHERE username=?;`,
+				p.username,
+			)
+
+			var hash []byte
+			err = row.Scan(&hash)
+			if err != nil {
+				t.Fatalf("Could not scan for password: %v", err)
+			}
+
+			err = bcrypt.CompareHashAndPassword(hash, []byte(p.password))
+			if err != nil {
+				t.Fatalf("Password not valid after registration: %v", err)
+			}
+
+			err = bcrypt.CompareHashAndPassword(hash, []byte(""))
+			if err == nil {
+				t.Fatalf("Empty password is valid after registration.")
+			}
+		})
+	}
+}