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Adds a very basic shadowing test.

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For the record, I'm aware that there's a lot here that I'm not testing. I think the smart move is to get towards a running machine and see which configurations it actually tries to set up, then follow along with appropriate testing; it might cause me to discover a flaw in my comprehension before I've made the same mistake in both the code and a test.
This commit is contained in:
Thomas Harte 2020-10-27 19:59:41 -04:00
parent e44f95a882
commit bdda84dfde
1 changed files with 25 additions and 18 deletions
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43
OSBindings/Mac/Clock SignalTests/IIgsMemoryMapTests.mm
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@ -29,36 +29,40 @@ namespace {
_memoryMap.set_storage(_ram, _rom);
}
- (void)write:(uint8_t)value address:(uint32_t)address {
const auto &region = MemoryMapRegion(_memoryMap, address);
MemoryMapWrite(_memoryMap, region, address, &value);
}
- (uint8_t)readAddress:(uint32_t)address {
const auto &region = MemoryMapRegion(_memoryMap, address);
uint8_t value;
MemoryMapRead(region, address, &value);
return value;
}
- (void)testHigherRAM {
// Fill memory via the map.
for(int address = 0x020000; address < 0x800000; ++address) {
const auto &region = MemoryMapRegion(_memoryMap, address);
const uint8_t value = uint8_t(address ^ (address >> 8));
MemoryMapWrite(_memoryMap, region, address, &value);
[self write:value address:address];
}
// Test by direct access.
for(int address = 0x020000; address < 0x800000; ++address) {
const uint8_t value = uint8_t(address ^ (address >> 8));
XCTAssertEqual(_ram[address], value);
XCTAssertEqual([self readAddress:address], value);
}
}
- (void)testROMReadonly {
- (void)testROMIsReadonly {
_rom[0] = 0xc0;
// Test that ROM can be read in the correct location.
const uint32_t address = 0xfc0000;
const auto &region = MemoryMapRegion(_memoryMap, address);
uint8_t value;
MemoryMapRead(region, address, &value);
XCTAssertEqual(value, 0xc0);
XCTAssertEqual([self readAddress:0xfc0000], 0xc0);
// Try writing to it, and check that nothing happened.
value = 0xfc;
MemoryMapWrite(_memoryMap, region, address, &value);
[self write:0xfc address:0xfc0000];
XCTAssertEqual(_rom[0], 0xc0);
}
@ -66,11 +70,7 @@ namespace {
_rom.back() = 0xa8;
auto test_bank = [self](uint32_t bank) {
const uint32_t address = bank | 0x00ffff;
const auto &region = MemoryMapRegion(_memoryMap, address);
uint8_t value;
MemoryMapRead(region, address, &value);
XCTAssertEqual(value, 0xa8);
XCTAssertEqual([self readAddress:address], 0xa8);
};
test_bank(0x000000);
@ -79,4 +79,11 @@ namespace {
test_bank(0xe10000);
}
- (void)testShadowing {
[self write:0xab address:0x000400];
[self write:0xcd address:0x010400];
XCTAssertEqual([self readAddress:0xe00400], 0xab);
XCTAssertEqual([self readAddress:0xe10400], 0xcd);
}
@end