Qt: Create TestPassphraseProvider on stack

* lang/qt/tests/t-encrypt.cpp, lang/qt/tests/t-tofuinfo.cpp: Create
TestPassphraseProvider on stack.

--
Context does not delete the provider. This fixes ASAN errors.

2 files changed, 7 insertions, 4 deletions

diff --git a/lang/qt/tests/t-encrypt.cpp b/lang/qt/tests/t-encrypt.cpp
index b0b6994c..c6fcaa21 100644
--- a/lang/qt/tests/t-encrypt.cpp
+++ b/lang/qt/tests/t-encrypt.cpp
@@ -71,7 +71,8 @@ private Q_SLOTS:
 
         /* Now decrypt */
         auto ctx = Context::createForProtocol(OpenPGP);
-        ctx->setPassphraseProvider(new TestPassphraseProvider);
+        TestPassphraseProvider provider;
+        ctx->setPassphraseProvider(&provider);
         ctx->setPinentryMode(Context::PinentryLoopback);
         auto decJob = new QGpgMEDecryptJob(ctx);
         QByteArray plainText;
@@ -84,7 +85,8 @@ private Q_SLOTS:
     void testSymmetricEncryptDecrypt()
     {
         auto ctx = Context::createForProtocol(OpenPGP);
-        ctx->setPassphraseProvider(new TestPassphraseProvider);
+        TestPassphraseProvider provider;
+        ctx->setPassphraseProvider(&provider);
         ctx->setPinentryMode(Context::PinentryLoopback);
         ctx->setArmor(true);
         ctx->setTextMode(true);
@@ -99,7 +101,7 @@ private Q_SLOTS:
         killAgent(mDir.path());
 
         auto ctx2 = Context::createForProtocol(OpenPGP);
-        ctx2->setPassphraseProvider(new TestPassphraseProvider);
+        ctx2->setPassphraseProvider(&provider);
         ctx2->setPinentryMode(Context::PinentryLoopback);
         auto decJob = new QGpgMEDecryptJob(ctx2);
         QByteArray plainText;
diff --git a/lang/qt/tests/t-tofuinfo.cpp b/lang/qt/tests/t-tofuinfo.cpp
index 83310921..3072f0fc 100644
--- a/lang/qt/tests/t-tofuinfo.cpp
+++ b/lang/qt/tests/t-tofuinfo.cpp
@@ -73,7 +73,8 @@ class TofuInfoTest: public QGpgMETest
     void signAndVerify(const QString &what, const GpgME::Key &key, int expected)
     {
         Context *ctx = Context::createForProtocol(OpenPGP);
-        ctx->setPassphraseProvider(new TestPassphraseProvider);
+        TestPassphraseProvider provider;
+        ctx->setPassphraseProvider(&provider);
         ctx->setPinentryMode(Context::PinentryLoopback);
         auto *job = new QGpgMESignJob(ctx);