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added some tests for branching operations

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Preston Skupinski 2011-05-05 21:41:10 -04:00
parent d9917b0d4e
commit f2f47833a7
1 changed files with 44 additions and 0 deletions
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test/tests.js
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@ -17,6 +17,50 @@
function run_tests() {
test_rep();
test_sep();
test_branching();
}
function test_branching() {
module("Branching");
test("Test that BRA with 0x00 as its argument doesn't increment or "+
"decrement the program counter", function() {
var cpu = new CPU_65816();
cpu.execute("8000");
// NOTE: 0x8003 is subject to change however I decide to lay out memory
// eventually.
equals(cpu.r.pc, 0x8003, "Make sure that the program counter isn't "+
"incremented or decremented if BRA is given "+
"0x00 as its argument.");
});
test("Check that the branching operations properly treat the argument as "+
"a two's complement number", function() {
var cpu = new CPU_65816();
cpu.execute("80f0"); // negative two's complement number 0xf0 = -16
equals(cpu.r.pc, (0x8003-16), "A branching operation when given a "+
"negative two's complement number should "+
"decrement the program counter by the "+
"proper amount.");
cpu.execute("8020"); // positive two's complement number.
equals(cpu.r.pc, (0x8003+0x20), "A branching operation when given a "+
"positive two's complement number should "+
"increment the program counter by the "+
"proper amount.");
});
test("Check that BPL works as expected", function() {
var cpu = new CPU_65816();
cpu.execute("18fbc230a9fe7f1a10fd");
equals(cpu.r.a, 0x8000, "Check that branching only occurs while the "+
"number is a two's complement positive number.");
});
test("Check that BMI works as expected", function() {
var cpu = new CPU_65816();
cpu.execute("18fbc230a901803a30fd");
equals(cpu.r.a, 0x7fff, "Check that branching only occurs while the "+
"number is a two's complement negative number.");
});
}
function test_sep() {