fix: harden search and release safeguards

tests/long_long_spin_box_test.cpp

@@ -0,0 +1,40 @@
+#include "long_long_spin_box.h"
+
+#include <QLineEdit>
+#include <QtTest>
+
+class LongLongSpinBoxTest final : public QObject {
+    Q_OBJECT
+
+private slots:
+    void preservesValuesAboveTwoGigabytes()
+    {
+        LongLongSpinBox spin;
+        spin.setRange(0, std::numeric_limits<qint64>::max());
+        spin.setSuffix(QStringLiteral(" bytes"));
+        spin.setValue(5'000'000'000);
+        QCOMPARE(spin.value(), qint64(5'000'000'000));
+        QCOMPARE(spin.findChild<QLineEdit *>()->text(), QStringLiteral("5000000000 bytes"));
+        spin.stepUp();
+        QCOMPARE(spin.value(), qint64(5'000'000'001));
+
+        spin.findChild<QLineEdit *>()->setText(QStringLiteral("6000000000 bytes"));
+        QVERIFY(QMetaObject::invokeMethod(&spin, "editingFinished", Qt::DirectConnection));
+        QCOMPARE(spin.value(), qint64(6'000'000'000));
+    }
+
+    void clampsAtRangeEdges()
+    {
+        LongLongSpinBox spin;
+        spin.setRange(0, 10);
+        spin.setValue(10);
+        spin.stepUp();
+        QCOMPARE(spin.value(), qint64(10));
+        spin.setValue(-50);
+        QCOMPARE(spin.value(), qint64(0));
+    }
+};
+
+QTEST_MAIN(LongLongSpinBoxTest)
+
+#include "long_long_spin_box_test.moc"

tests/release_dirty_test.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+release_script="$(realpath "$1")"
+test_directory="$(mktemp -d)"
+trap 'rm -rf "$test_directory"' EXIT
+
+git -C "$test_directory" init -q
+git -C "$test_directory" config user.name "FolderScope Tests"
+git -C "$test_directory" config user.email "tests@folderscope.invalid"
+printf '9.9.9\n' > "$test_directory/VERSION"
+printf '# Changelog\n\n## [9.9.9]\n' > "$test_directory/CHANGELOG.md"
+git -C "$test_directory" add VERSION CHANGELOG.md
+git -C "$test_directory" commit -q -m "test fixture"
+touch "$test_directory/untracked"
+
+if (cd "$test_directory" && "$release_script" 9.9.9 >/dev/null 2>&1); then
+    echo "release.sh accepted a repository with untracked files" >&2
+    exit 1
+fi

tests/search_core_test.cpp

@@ -0,0 +1,86 @@
+#include "search_core.h"
+
+#include <QCryptographicHash>
+#include <QFile>
+#include <QTemporaryDir>
+#include <QtTest>
+
+class SearchCoreTest final : public QObject {
+    Q_OBJECT
+
+private slots:
+    void parsesPatternsAndExclusions()
+    {
+        QCOMPARE(patterns(QStringLiteral("/a; \"/b,with-comma\" , /c")),
+                 QStringList({QStringLiteral("/a"), QStringLiteral("/b,with-comma"),
+                              QStringLiteral("/c")}));
+        QCOMPARE(exclusionPatterns(QStringLiteral("tmp log *.bak")),
+                 QStringList({QStringLiteral("*.tmp"), QStringLiteral("*.log"),
+                              QStringLiteral("*.bak")}));
+        QVERIFY(wildcardMatch(QStringLiteral("Report.TXT"), {QStringLiteral("*.txt")},
+                              Qt::CaseInsensitive));
+        QVERIFY(!wildcardMatch(QStringLiteral("Report.TXT"), {QStringLiteral("*.txt")},
+                               Qt::CaseSensitive));
+    }
+
+    void parsesOptionalIsoDates()
+    {
+        qint64 seconds = -1;
+        QVERIFY(parseOptionalIsoDate(QString{}, seconds));
+        QCOMPARE(seconds, 0);
+        QVERIFY(parseOptionalIsoDate(QStringLiteral("2026-07-25T20:30:00"), seconds));
+        QVERIFY(seconds > 0);
+        QVERIFY(!parseOptionalIsoDate(QStringLiteral("2026-not-a-date"), seconds));
+    }
+
+    void searchesContentsAndHashes()
+    {
+        QTemporaryDir directory;
+        QVERIFY(directory.isValid());
+        const QString firstPath = directory.filePath(QStringLiteral("first.bin"));
+        const QString secondPath = directory.filePath(QStringLiteral("second.bin"));
+        const QString differentPath = directory.filePath(QStringLiteral("different.bin"));
+        const QByteArray content = QByteArray(1024 * 1024 - 2, 'x')
+            + QByteArray("Alpha needle BETA");
+
+        QFile first(firstPath);
+        QVERIFY(first.open(QIODevice::WriteOnly));
+        QCOMPARE(first.write(content), content.size());
+        first.close();
+
+        QFile second(secondPath);
+        QVERIFY(second.open(QIODevice::WriteOnly));
+        QCOMPARE(second.write(content), content.size());
+        second.close();
+
+        QFile different(differentPath);
+        QVERIFY(different.open(QIODevice::WriteOnly));
+        QCOMPARE(different.write("different"), qint64(9));
+        different.close();
+
+        SearchOptions options;
+        options.contains = QStringLiteral("needle");
+        QVERIFY(fileContains(firstPath, options));
+        options.contains = QStringLiteral("alpha,beta");
+        options.multipleValues = true;
+        options.multipleAnd = true;
+        QVERIFY(fileContains(firstPath, options));
+        options.caseSensitive = true;
+        QVERIFY(!fileContains(firstPath, options));
+        options.binary = true;
+        options.multipleValues = false;
+        options.multipleAnd = false;
+        options.contains = QStringLiteral("41 6c 70 68 61");
+        QVERIFY(fileContains(firstPath, options));
+        options.contains = QStringLiteral("ABC");
+        QVERIFY(!fileContains(firstPath, options));
+
+        QVERIFY(filesEqual(firstPath, secondPath));
+        QVERIFY(!filesEqual(firstPath, differentPath));
+        QCOMPARE(sha256(firstPath), QCryptographicHash::hash(content, QCryptographicHash::Sha256));
+    }
+};
+
+QTEST_GUILESS_MAIN(SearchCoreTest)
+
+#include "search_core_test.moc"