test: add device token validation and text utility tests

internal/handlers/collections_test.go

@@ -90,3 +90,21 @@ func TestEvaluateRule_CopyrightYear(t *testing.T) {
 	result = handler.evaluateRule(item, "copyright_year", "less_than", "2000")
 	assert.False(t, result)
 }
+
+func TestTextToString(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    pgtype.Text
+		expected string
+	}{
+		{"valid text", pgtype.Text{String: "hello", Valid: true}, "hello"},
+		{"null text", pgtype.Text{Valid: false}, ""},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := textToString(tt.input)
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}

internal/handlers/devices_test.go

@@ -200,3 +200,24 @@ func TestDeviceUpdateRequest_Validation(t *testing.T) {
 		})
 	}
 }
+
+func TestValidateDeviceToken(t *testing.T) {
+	hashedToken := []byte("$2a$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi")
+	plainToken := "password"
+
+	result := ValidateDeviceToken(string(hashedToken), plainToken)
+	assert.True(t, result, "Valid token should return true")
+}
+
+func TestValidateDeviceToken_Invalid(t *testing.T) {
+	hashedToken := []byte("$2a$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi")
+	plainToken := "wrongpassword"
+
+	result := ValidateDeviceToken(string(hashedToken), plainToken)
+	assert.False(t, result, "Invalid token should return false")
+}
+
+func TestValidateDeviceToken_Empty(t *testing.T) {
+	result := ValidateDeviceToken("", "anypassword")
+	assert.False(t, result, "Empty hash should return false")
+}