new unit tests, hehe 67

Signed-off-by: galeon <dertiellis@gmail.com>

tests/unit/tst_zlibreference.cpp

@@ -0,0 +1,65 @@
+#include "testenv.h"
+
+#include "localization.h"
+#include "zlibreference.h"
+
+#include <QDir>
+#include <QFileInfo>
+#include <QProcessEnvironment>
+
+class TestZlibReference : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void nonLinuxIsNoop()
+    {
+#if defined(Q_OS_LINUX)
+        QSKIP("только для Windows и macOS");
+#else
+        QVERIFY(!ZlibReference::systemIsZlibNg());
+        QVERIFY(ZlibReference::bundledPath().isEmpty());
+        QProcessEnvironment env;
+        env.insert(QStringLiteral("LD_PRELOAD"), QStringLiteral("/x.so"));
+        QString note = QStringLiteral("stale");
+        QVERIFY(ZlibReference::applyTo(env, &note));
+        QVERIFY(note.isEmpty());
+        QCOMPARE(env.value(QStringLiteral("LD_PRELOAD")), QStringLiteral("/x.so"));
+#endif
+    }
+
+    void linuxPreloadFollowsSystemZlib()
+    {
+#if !defined(Q_OS_LINUX)
+        QSKIP("только для Linux");
+#else
+        QProcessEnvironment env;
+        env.insert(QStringLiteral("LD_PRELOAD"), QStringLiteral("/other.so"));
+        QString note;
+        const bool ok = ZlibReference::applyTo(env, &note);
+
+        if (!ZlibReference::systemIsZlibNg()) {
+            // Обычный zlib: окружение не трогаем.
+            QVERIFY(ok);
+            QVERIFY(note.isEmpty());
+            QCOMPARE(env.value(QStringLiteral("LD_PRELOAD")), QStringLiteral("/other.so"));
+            return;
+        }
+
+        const QString bundled = ZlibReference::bundledPath();
+        if (bundled.isEmpty()) {
+            QVERIFY(!ok);
+            QCOMPARE(note, Loc::text("zlib.warning.referenceMissing"));
+            QCOMPARE(env.value(QStringLiteral("LD_PRELOAD")), QStringLiteral("/other.so"));
+        } else {
+            QVERIFY(ok);
+            // Наш zlib первым, чужой LD_PRELOAD сохраняется.
+            QCOMPARE(env.value(QStringLiteral("LD_PRELOAD")), bundled + QStringLiteral(":/other.so"));
+            QVERIFY(QFileInfo(bundled).isFile());
+        }
+#endif
+    }
+};
+
+BILAUNCHER_TEST_MAIN(TestZlibReference)
+#include "tst_zlibreference.moc"