feat: debounce the calendar sync command after writes

1 files changed, 94 insertions, 0 deletions

diff --git a/tests/test_calendarsync.cpp b/tests/test_calendarsync.cpp
new file mode 100644
index 0000000..e5cdee5
--- /dev/null
+++ b/tests/test_calendarsync.cpp
@@ -0,0 +1,94 @@
+/*
+ * qtmaildir - a Qt6 mail client for notmuch-indexed Maildirs
+ * Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <QtTest>
+#include <QFile>
+#include <QSignalSpy>
+#include <QTemporaryDir>
+
+#include "calendarsync.h"
+
+namespace {
+
+/// A script that appends a line to `log` each run and exits with `code`.
+QString script(const QTemporaryDir &dir, int code)
+{
+    const QString path = dir.filePath(QStringLiteral("sync.sh"));
+    QFile f(path);
+    f.open(QIODevice::WriteOnly);
+    f.write(QStringLiteral("#!/bin/sh\necho run >> %1\necho output\nexit %2\n")
+                .arg(dir.filePath(QStringLiteral("log"))).arg(code).toUtf8());
+    f.close();
+    f.setPermissions(f.permissions() | QFileDevice::ExeOwner);
+    return path;
+}
+
+int runs(const QTemporaryDir &dir)
+{
+    QFile f(dir.filePath(QStringLiteral("log")));
+    return f.open(QIODevice::ReadOnly) ? f.readAll().count('\n') : 0;
+}
+
+} // namespace
+
+class TestCalendarSync : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void aBurstOfWritesRunsOnce();
+    void reportsFailureWithTheOutput();
+    void anEmptyCommandNeverRuns();
+};
+
+void TestCalendarSync::aBurstOfWritesRunsOnce()
+{
+    QTemporaryDir dir;
+    CalendarSync sync(script(dir, 0), 50);
+    QSignalSpy finished(&sync, &CalendarSync::finished);
+    sync.schedule();
+    sync.schedule();
+    sync.schedule();
+    QVERIFY(finished.wait(5000));
+    QCOMPARE(finished.first().at(0).toBool(), true);
+    QTest::qWait(200);  // nothing else is queued, so nothing else may run
+    QCOMPARE(runs(dir), 1);
+}
+
+void TestCalendarSync::reportsFailureWithTheOutput()
+{
+    QTemporaryDir dir;
+    CalendarSync sync(script(dir, 3), 0);
+    QSignalSpy finished(&sync, &CalendarSync::finished);
+    sync.schedule();
+    QVERIFY(finished.wait(5000));
+    QCOMPARE(finished.first().at(0).toBool(), false);
+    QVERIFY(finished.first().at(1).toString().contains(QStringLiteral("output")));
+}
+
+void TestCalendarSync::anEmptyCommandNeverRuns()
+{
+    CalendarSync sync(QString(), 0);
+    QSignalSpy started(&sync, &CalendarSync::started);
+    sync.schedule();
+    QTest::qWait(100);
+    QCOMPARE(started.count(), 0);
+}
+
+QTEST_MAIN(TestCalendarSync)
+#include "test_calendarsync.moc"