MemoryRegion.java

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package com.rox.debug.memory;
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/**
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 * The CPU address ranges worth browsing in a memory viewer, matching how {@code NESMemoryBus} actually
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 * routes them. Deliberately no {@code $2000-$4017}: reading those registers has side effects (clearing
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 * vblank, advancing {@code $2007}'s buffer, shifting controller bits), so a passive view can't show them.
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 */
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public enum MemoryRegion {
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    CPU_RAM("CPU RAM", 0x0000, 0x07FF),
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    ZERO_PAGE("Zero page", 0x0000, 0x00FF),
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    STACK("Stack", 0x0100, 0x01FF),
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    PRG_RAM("PRG-RAM", 0x6000, 0x7FFF),
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    PRG_ROM("PRG-ROM (as currently banked)", 0x8000, 0xFFFF);
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    private final String label;
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    private final int start;
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    private final int end;
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    MemoryRegion(final String label, final int start, final int end){
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        this.label = label;
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        this.start = start;
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        this.end = end;
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    }
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    public int start(){
26 1 1. start : replaced int return with 0 for com/rox/debug/memory/MemoryRegion::start → KILLED
 
        return start;
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    }
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    /** Inclusive. */
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    public int end(){
31 1 1. end : replaced int return with 0 for com/rox/debug/memory/MemoryRegion::end → KILLED
 
        return end;
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    }
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    /** e.g. {@code Stack ($0100-$01FF)} - what a region picker shows. */
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    @Override
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    public String toString(){
37 1 1. toString : replaced return value with "" for com/rox/debug/memory/MemoryRegion::toString → KILLED
 
        return String.format("%s ($%04X-$%04X)", label, start, end);
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    }
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}

Mutations

26

1.1
Location : start
Killed by : com.rox.debug.memory.MemoryRegionTest.[engine:junit-jupiter]/[class:com.rox.debug.memory.MemoryRegionTest]/[test-template:noRegionTouchesTheRegisterRange(com.rox.debug.memory.MemoryRegion)]/[test-template-invocation:#4] replaced int return with 0 for com/rox/debug/memory/MemoryRegion::start → KILLED

31

1.1
Location : end
Killed by : com.rox.debug.memory.MemoryRegionTest.[engine:junit-jupiter]/[class:com.rox.debug.memory.MemoryRegionTest]/[method:rangesMatchTheBusMap()] replaced int return with 0 for com/rox/debug/memory/MemoryRegion::end → KILLED

37

1.1
Location : toString
Killed by : com.rox.debug.memory.MemoryRegionTest.[engine:junit-jupiter]/[class:com.rox.debug.memory.MemoryRegionTest]/[method:labelsIncludeTheRange()] replaced return value with "" for com/rox/debug/memory/MemoryRegion::toString → KILLED

Active mutators

Tests examined


Report generated by PIT 1.22.1