[libcalamares] Test the Entropy service

src/libcalamares/utils/Tests.cpp

@@ -19,6 +19,7 @@
 #include "Tests.h"
 
 #include "CalamaresUtilsSystem.h"
+#include "Entropy.h"
 #include "Logger.h"
 #include "UMask.h"
 #include "Yaml.h"
@@ -176,3 +177,26 @@ LibCalamaresTests::testUmask()
     QCOMPARE( CalamaresUtils::setUMask( 022 ), m );
     QCOMPARE( CalamaresUtils::setUMask( m ), 022 );
 }
+
+void
+LibCalamaresTests::testEntropy()
+{
+    QByteArray data;
+
+    auto r0 = CalamaresUtils::getEntropy( 0, data );
+    QCOMPARE( CalamaresUtils::EntropySource::None, r0 );
+    QCOMPARE( 0, data.size() );
+
+    auto r1 = CalamaresUtils::getEntropy( 16, data );
+    QVERIFY( r1 != CalamaresUtils::EntropySource::None );
+    QCOMPARE( 16, data.size() );
+    // This can randomly fail (but not often)
+    QVERIFY( data.at( data.size() - 1 ) != char( 0xcb ) );
+
+    auto r2 = CalamaresUtils::getEntropy( 8, data );
+    QVERIFY( r2 != CalamaresUtils::EntropySource::None );
+    QCOMPARE( 8, data.size() );
+    QCOMPARE( r1, r2 );
+    // This can randomly fail (but not often)
+    QVERIFY( data.at( data.size() - 1 ) != char( 0xcb ) );
+}

src/libcalamares/utils/Tests.h

@@ -39,6 +39,9 @@ private Q_SLOTS:
 
     /** @brief Test that all the UMask objects work correctly. */
     void testUmask();
+
+    /** @brief Tests the entropy functions. */
+    void testEntropy();
 };
 
 #endif