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import cpu.Registers
import cpu.Registers.Flag
import io.kotlintest.shouldBe
import io.kotlintest.shouldThrow
import io.kotlintest.specs.StringSpec
import java.lang.IllegalArgumentException
class RegisterTest : StringSpec({
"Test 16-Bit accessors" {
val reg = Registers()
reg.AF = 0xF83C
reg.AF shouldBe 0xF83C
reg.A shouldBe 0xF8
reg.F shouldBe 0x3C
reg.BC = 0xF83C
reg.BC shouldBe 0xF83C
reg.B shouldBe 0xF8
reg.C shouldBe 0x3C
reg.DE = 0xF83C
reg.DE shouldBe 0xF83C
reg.D shouldBe 0xF8
reg.E shouldBe 0x3C
reg.HL = 0xF83C
reg.HL shouldBe 0xF83C
reg.H shouldBe 0xF8
reg.L shouldBe 0x3C
}
"Test 8-Bit register validation" {
val reg = Registers()
shouldThrow<IllegalArgumentException> {
reg.A = 0xFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.F = 0xFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.B = 0xFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.C = 0xFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.D = 0xFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.E = 0xFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.H = 0xFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.L = 0xFFFF
Any()
}
}
"Test 16-Bit register validation" {
val reg = Registers()
shouldThrow<IllegalArgumentException> {
reg.AF = 0xFFFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.BC = 0xFFFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.DE = 0xFFFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.HL = 0xFFFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.SP = 0xFFFFFF
Any()
}
shouldThrow<IllegalArgumentException> {
reg.PC = 0xFFFFFF
Any()
}
}
"Test registers" {
val reg = Registers()
reg.A = 0xA0
reg.A shouldBe 0xA0
reg.F = 0xA1
reg.F shouldBe 0xA1
reg.B = 0xA2
reg.B shouldBe 0xA2
reg.C = 0xA3
reg.C shouldBe 0xA3
reg.D = 0xA4
reg.D shouldBe 0xA4
reg.E = 0xA5
reg.E shouldBe 0xA5
reg.H = 0xA6
reg.H shouldBe 0xA6
reg.L = 0xA7
reg.L shouldBe 0xA7
reg.SP = 0xAAFE
reg.SP shouldBe 0xAAFE
reg.PC = 0xAAFE
reg.PC shouldBe 0xAAFE
}
"Test flags" {
val reg = Registers()
reg.getFlag(Flag.ZERO) shouldBe 0
reg.getFlag(Flag.SUBTRACT) shouldBe 0
reg.getFlag(Flag.HALF_CARRY) shouldBe 0
reg.getFlag(Flag.CARRY) shouldBe 0
reg.setFlag(Flag.ZERO)
reg.setFlag(Flag.SUBTRACT)
reg.setFlag(Flag.HALF_CARRY)
reg.setFlag(Flag.CARRY)
reg.getFlag(Flag.ZERO) shouldBe 1
reg.getFlag(Flag.SUBTRACT) shouldBe 1
reg.getFlag(Flag.HALF_CARRY) shouldBe 1
reg.getFlag(Flag.CARRY) shouldBe 1
reg.F shouldBe 0xF0
reg.clearFlag(Flag.ZERO)
reg.clearFlag(Flag.SUBTRACT)
reg.clearFlag(Flag.HALF_CARRY)
reg.clearFlag(Flag.CARRY)
reg.getFlag(Flag.ZERO) shouldBe 0
reg.getFlag(Flag.SUBTRACT) shouldBe 0
reg.getFlag(Flag.HALF_CARRY) shouldBe 0
reg.getFlag(Flag.CARRY) shouldBe 0
reg.F shouldBe 0x00
reg.setFlag(Flag.ZERO)
reg.setFlag(Flag.HALF_CARRY)
reg.getFlag(Flag.ZERO) shouldBe 1
reg.getFlag(Flag.SUBTRACT) shouldBe 0
reg.getFlag(Flag.HALF_CARRY) shouldBe 1
reg.getFlag(Flag.CARRY) shouldBe 0
reg.F shouldBe 0xA0 // 10100000
reg.setFlag(Flag.SUBTRACT)
reg.setFlag(Flag.CARRY)
reg.clearFlag(Flag.ZERO)
reg.clearFlag(Flag.HALF_CARRY)
reg.getFlag(Flag.ZERO) shouldBe 0
reg.getFlag(Flag.SUBTRACT) shouldBe 1
reg.getFlag(Flag.HALF_CARRY) shouldBe 0
reg.getFlag(Flag.CARRY) shouldBe 1
reg.F shouldBe 0x50 // 01010000
}
})
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