Add possibility to compare memory and registers state

For core testing we want to compare whole memory and registers.
Registers are pretty simple but in case of memory it is some what more
complicated and required its own tests to be sure that it works.

1 files changed, 25 insertions, 3 deletions

diff --git a/qtmips_machine/tests/testmemory.cpp b/qtmips_machine/tests/testmemory.cpp
index e450231..091c26d 100644
--- a/qtmips_machine/tests/testmemory.cpp
+++ b/qtmips_machine/tests/testmemory.cpp
@@ -44,8 +44,7 @@ void MachineTests::memory_section() {
 
     QFETCH(std::uint32_t, address);
 
-    // First section shouldn't exists
-    QCOMPARE(m.get_section(address, false), (MemorySection*)nullptr);
+    // First section shouldn't exists QCOMPARE(m.get_section(address, false), (MemorySection*)nullptr);
     // Create section
     MemorySection *s = m.get_section(address, true);
     QVERIFY(s != nullptr);
@@ -63,7 +62,7 @@ void MachineTests::memory_section() {
 void MachineTests::memory_endian() {
     Memory m;
 
-    // Memory should be bit endian so write bytes from most significant byte
+    // Memory should be little endian so write bytes from most significant byte
     m.write_byte(0x00, 0x12);
     m.write_byte(0x01, 0x34);
     m.write_byte(0x02, 0x56);
@@ -81,3 +80,26 @@ void MachineTests::memory_endian() {
     QCOMPARE(m.read_byte(0xF2), (std::uint8_t)0x56);
     QCOMPARE(m.read_byte(0xF3), (std::uint8_t)0x78);
 }
+
+void MachineTests::memory_compare() {
+    Memory m1, m2;
+    QCOMPARE(m1, m2);
+    m1.write_byte(0x20,0x0);
+    QVERIFY(m1 != m2); // This should not be equal as this identifies also memory write (difference between no write and zero write)
+    m1.write_byte(0x20,0x24);
+    QVERIFY(m1 != m2);
+    m2.write_byte(0x20,0x23);
+    QVERIFY(m1 != m2);
+    m2.write_byte(0x20,0x24);
+    QCOMPARE(m1, m2);
+    // Do the same with some other section
+    m1.write_byte(0xFFFF20, 0x24);
+    QVERIFY(m1 != m2);
+    m2.write_byte(0xFFFF20, 0x24);
+    QCOMPARE(m1, m2);
+    // And also check memory copy
+    Memory m3(m1);
+    QCOMPARE(m1, m3);
+    m3.write_byte(0x18, 0x22);
+    QVERIFY(m1 != m3);
+}