prog8/virtualmachine/test/TestInstructions.kt

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Kotlin
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import io.kotest.assertions.throwables.shouldThrow
import io.kotest.core.spec.style.FunSpec
import io.kotest.matchers.shouldBe
import io.kotest.matchers.shouldNotBe
import prog8.vm.Instruction
import prog8.vm.Opcode
import prog8.vm.VmDataType
import prog8.vm.instructionFormats
class TestInstructions: FunSpec({
test("simple") {
val ins = Instruction(Opcode.NOP)
ins.opcode shouldBe Opcode.NOP
ins.type shouldBe null
ins.reg1 shouldBe null
ins.reg2 shouldBe null
ins.value shouldBe null
ins.labelSymbol shouldBe null
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ins.toString() shouldBe "nop"
}
test("with value") {
val ins = Instruction(Opcode.BZ, VmDataType.BYTE, reg1=42, value = 9999)
ins.opcode shouldBe Opcode.BZ
ins.type shouldBe VmDataType.BYTE
ins.reg1 shouldBe 42
ins.reg2 shouldBe null
ins.value shouldBe 9999
ins.labelSymbol shouldBe null
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ins.toString() shouldBe "bz.b r42,9999"
}
test("with label") {
val ins = Instruction(Opcode.BZ, VmDataType.WORD, reg1=11, labelSymbol = listOf("a","b","c"))
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ins.opcode shouldBe Opcode.BZ
ins.type shouldBe VmDataType.WORD
ins.reg1 shouldBe 11
ins.reg2 shouldBe null
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ins.value shouldBe null
ins.labelSymbol shouldBe listOf("a","b","c")
ins.toString() shouldBe "bz.w r11,_a.b.c"
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}
test("missing type should fail") {
shouldThrow<IllegalArgumentException> {
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Instruction(Opcode.BZ, reg1=42, value=9999)
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}
}
test("missing registers should fail") {
shouldThrow<IllegalArgumentException> {
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Instruction(Opcode.BZ, VmDataType.BYTE, value=9999)
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}
}
test("missing value should fail") {
shouldThrow<IllegalArgumentException> {
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Instruction(Opcode.BZ, VmDataType.BYTE, reg1=42)
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}
}
test("all instructionformats") {
Opcode.values().forEach {
instructionFormats[it] shouldNotBe null
}
}
})