scratch/brainfuck/test/gbf_vm_test.gleam (view raw)
| 1 | import gbf/internal/ascii |
| 2 | import gbf/internal/vm.{type VirtualMachine} |
| 3 | import gleam/result |
| 4 | import gleeunit/should |
| 5 | |
| 6 | fn setup(input) -> VirtualMachine { |
| 7 | vm.new(input) |
| 8 | } |
| 9 | |
| 10 | pub fn get_cell_test() { |
| 11 | let vm = setup([]) |
| 12 | |
| 13 | vm.get_cell(vm, 3) |
| 14 | |> should.equal(Ok(0)) |
| 15 | } |
| 16 | |
| 17 | pub fn get_cell_out_of_tape_test() { |
| 18 | let vm = setup([]) |
| 19 | |
| 20 | vm.get_cell(vm, vm.tape_size + 1) |
| 21 | |> should.equal(Error(vm.PointerRanOffTape)) |
| 22 | } |
| 23 | |
| 24 | pub fn set_cell_test() { |
| 25 | let vm = setup([]) |
| 26 | |
| 27 | vm.set_cell(vm, 2, 22) |
| 28 | |> should.be_ok |
| 29 | } |
| 30 | |
| 31 | pub fn set_cell_errors_test() { |
| 32 | let vm = setup([]) |
| 33 | |
| 34 | vm.set_cell(vm, vm.tape_size + 1, 22) |
| 35 | |> should.be_error |
| 36 | |
| 37 | vm.set_cell(vm, 2, vm.cell_size + 1) |
| 38 | |> should.be_error |
| 39 | } |
| 40 | |
| 41 | pub fn set_pointer_test() { |
| 42 | let vm = setup([]) |
| 43 | |
| 44 | vm.set_pointer(vm, 2) |
| 45 | |> should.be_ok |
| 46 | } |
| 47 | |
| 48 | pub fn output_byte_empty_test() { |
| 49 | let vm = setup([]) |
| 50 | |
| 51 | vm.output_byte(vm) |
| 52 | |> should.equal(Error(vm.InvalidChar(0))) |
| 53 | } |
| 54 | |
| 55 | pub fn output_byte_test() { |
| 56 | let vm = setup([ascii.to_code("a")]) |
| 57 | use vm <- result.try(vm.output_byte(vm)) |
| 58 | |
| 59 | should.equal(vm.output, "a") |
| 60 | Ok("") |
| 61 | } |
| 62 | |
| 63 | pub fn input_byte_empty_test() { |
| 64 | let vm = setup([]) |
| 65 | |
| 66 | vm.input_byte(vm) |
| 67 | |> should.equal(Error(vm.EmptyInput)) |
| 68 | } |
| 69 | |
| 70 | pub fn input_byte_test() { |
| 71 | let vm = setup([ascii.to_code("a"), ascii.to_code("b")]) |
| 72 | use vm <- result.try(vm.input_byte(vm)) |
| 73 | |
| 74 | should.equal(vm.input, [ascii.to_code("b")]) |
| 75 | Ok("") |
| 76 | } |