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Add unit tests for brainfuck and deadfish

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This commit is contained in:
Nilay Majorwar
2022-01-18 15:17:20 +05:30
parent d50e737682
commit eb9d5d861c
17 changed files with 458 additions and 275 deletions
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9
engines/brainfuck/constants.ts → engines/brainfuck/common.ts
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@ -79,3 +79,12 @@ export const editorTokensProvider: MonacoTokensProvider = {
}, },
defaultToken: "comment", defaultToken: "comment",
}; };
/** Serialize tape from object format into linear array */
export const serializeTapeMap = (tape: BFRS["tape"]): number[] => {
const cellIdxs = Object.keys(tape).map((s) => parseInt(s, 10));
const maxCellIdx = Math.max(15, ...cellIdxs);
const linearTape: number[] = Array(maxCellIdx + 1).fill(0);
cellIdxs.forEach((i) => (linearTape[i] = tape[i] || 0));
return linearTape;
};

180
engines/brainfuck/engine.ts
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@ -1,182 +1,4 @@
import { setupWorker } from "../setup-worker"; import { setupWorker } from "../setup-worker";
import { DocumentRange, LanguageEngine, StepExecutionResult } from "../types"; import BrainfuckLanguageEngine from "./runtime";
import { BFAstStep, BFInstruction, BFRS, BF_OP } from "./constants";
// Default values for internal states
// Factories are used to create new objects on reset
const DEFAULT_AST = (): BFAstStep[] => [];
const DEFAULT_PTR = 0;
const DEFAULT_PC = -1;
const DEFAULT_TAPE = (): { [k: number]: number } => ({});
const DEFAULT_INPUT: string = "";
// Instruction characters
const OP_CHARS = Object.values(BF_OP);
class BrainfuckLanguageEngine implements LanguageEngine<BFRS> {
private _ast: BFAstStep[] = DEFAULT_AST();
private _ptr: number = DEFAULT_PTR;
private _tape: { [k: number]: number } = DEFAULT_TAPE();
private _input: string = DEFAULT_INPUT;
private _pc: number = DEFAULT_PC;
resetState() {
this._ast = DEFAULT_AST();
this._ptr = DEFAULT_PTR;
this._tape = DEFAULT_TAPE();
this._input = DEFAULT_INPUT;
this._pc = DEFAULT_PC;
}
prepare(code: string, input: string) {
this._input = input;
this._ast = this.parseCode(code);
}
executeStep(): StepExecutionResult<BFRS> {
// Execute and update program counter
let output: string | undefined = undefined;
if (this._pc !== -1) {
const astStep = this._ast[this._pc];
const opResult = this.processOp(astStep.instr);
this._pc = opResult?.newPc == null ? this._pc + 1 : opResult.newPc;
output = opResult?.output;
} else this._pc += 1;
// Prepare location of next step
let nextStepLocation: DocumentRange | null = null;
if (this._pc < this._ast.length) {
const { line, char } = this._ast[this._pc].location;
const charRange = { start: char, end: char + 1 };
nextStepLocation = { line, charRange };
}
// Prepare and return execution result
const rendererState = { tape: this._tape, pointer: this._ptr };
return { rendererState, nextStepLocation, output };
}
private parseCode(code: string) {
const ast: BFAstStep[] = [];
// Stack to maintain loop counts. Element of stack denotes
// program counter for loop-opening instruction.
const loopStack: number[] = [];
// For each line...
code.split("\n").forEach((line, lIdx) => {
// For each character of this line...
line.split("").forEach((char, cIdx) => {
// Ignore if the character is not an operation
if (!OP_CHARS.includes(char as BF_OP)) return;
// Update loop-tracking stack if it's a loop-char
let jumpTarget = undefined;
if (char === BF_OP.LOOPIN) {
// Push loop start into stack
// Opposite end location will be added at loop close
loopStack.push(ast.length);
} else if (char === BF_OP.LOOPOUT) {
// Get location of loop-opener
jumpTarget = loopStack.pop()!;
// Add closing end location to loop-opener
ast[jumpTarget].instr.param = ast.length;
}
// Add instruction to AST
ast.push({
instr: { type: char as BF_OP, param: jumpTarget },
location: { line: lIdx + 1, char: cIdx + 1 },
});
});
});
return ast;
}
/**
* Process the given instruction and return the updated program counter and
* any output to send to stdout.
*
* If program counter is not returned, counter should be incremented by 1.
*
* @param instr Instruction to apply
* @returns Optional fields for new program counter and step output
*/
private processOp(
instr: BFInstruction
): { newPc?: number; output?: string } | void {
// Pointer-shift operations
if (instr.type === BF_OP.LEFT) this.decrementPtr();
else if (instr.type === BF_OP.RIGHT) this.incrementPtr();
// Current cell modifiers
else if (instr.type === BF_OP.INCR) this.incrementCell(this._ptr);
else if (instr.type === BF_OP.DECR) this.decrementCell(this._ptr);
// Input and output
else if (instr.type === BF_OP.OUT) return { output: this.outputChar() };
else if (instr.type === BF_OP.IN) this.inputChar();
// Looping
else if (instr.type === BF_OP.LOOPIN) {
// Conditionally jump past loop-closer
if (this.getCell(this._ptr) !== 0) return;
return { newPc: instr.param! + 1 };
} else if (instr.type === BF_OP.LOOPOUT) {
// Conditionally jump to loop-opener
if (this.getCell(this._ptr) === 0) return;
return { newPc: instr.param };
} else throw new Error("Unexpected instruction type");
}
/** Output character from current cell */
private outputChar(): string {
const code = this._tape[this._ptr];
return String.fromCharCode(code);
}
/** Input character into current cell */
private inputChar(): void {
if (this._input.length === 0) {
// EOF is treated as a zero
this._tape[this._ptr] = 0;
} else {
// Pop first char of input and set to cell
this._tape[this._ptr] = this._input.charCodeAt(0);
this._input = this._input.slice(1);
}
}
/** Get value of tape cell. Initializes cell if first use */
private getCell(cellId: number): number {
if (!this._tape[cellId]) this._tape[cellId] = 0;
return this._tape[cellId];
}
/** Increment tape cell at specified location */
private incrementCell(cellId: number): void {
if (!this._tape[cellId]) this._tape[cellId] = 0;
this._tape[cellId] += 1;
if (this._tape[cellId] === 128) this._tape[cellId] = -128;
}
/** Decrement tape cell at specified location */
private decrementCell(cellId: number): void {
if (!this._tape[cellId]) this._tape[cellId] = 0;
this._tape[cellId] -= 1;
if (this._tape[cellId] === -129) this._tape[cellId] = 127;
}
/** Move the tape pointer one cell to the right */
private incrementPtr(): void {
this._ptr += 1;
this.getCell(this._ptr); // Init cell if required
}
/** Move the tape pointer one cell to the left */
private decrementPtr(): void {
if (this._ptr <= 0) throw new Error("Ptr out of bounds");
this._ptr -= 1;
this.getCell(this._ptr); // Init cell if required
}
}
setupWorker(new BrainfuckLanguageEngine()); setupWorker(new BrainfuckLanguageEngine());

2
engines/brainfuck/index.ts
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@ -1,6 +1,6 @@
import { Renderer } from "./renderer"; import { Renderer } from "./renderer";
import { LanguageProvider } from "../types"; import { LanguageProvider } from "../types";
import { BFRS, sampleProgram, editorTokensProvider } from "./constants"; import { BFRS, sampleProgram, editorTokensProvider } from "./common";
const provider: LanguageProvider<BFRS> = { const provider: LanguageProvider<BFRS> = {
Renderer, Renderer,

13
engines/brainfuck/renderer.tsx
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@ -2,7 +2,7 @@ import { Card, Colors } from "@blueprintjs/core";
import { CSSProperties } from "react"; import { CSSProperties } from "react";
import { useDarkMode } from "../../ui/providers/dark-mode-provider"; import { useDarkMode } from "../../ui/providers/dark-mode-provider";
import { RendererProps } from "../types"; import { RendererProps } from "../types";
import { BFRS } from "./constants"; import { BFRS, serializeTapeMap } from "./common";
// Colors used as background of active cells // Colors used as background of active cells
const darkActiveBG = Colors.DARK_GRAY2; const darkActiveBG = Colors.DARK_GRAY2;
@ -47,18 +47,9 @@ const Cell = ({ value, active }: { value: number; active: boolean }) => {
/** Renderer for Brainfuck */ /** Renderer for Brainfuck */
export const Renderer = ({ state }: RendererProps<BFRS>) => { export const Renderer = ({ state }: RendererProps<BFRS>) => {
/** Serialize tape from object format into linear array */
const serializeTapeObj = (tape: BFRS["tape"]) => {
const cellIdxs = Object.keys(tape).map((s) => parseInt(s, 10));
const maxCellIdx = Math.max(15, ...cellIdxs);
const linearTape = Array(maxCellIdx + 1).fill(0);
cellIdxs.forEach((i) => (linearTape[i] = tape[i] || 0));
return linearTape;
};
return ( return (
<div style={styles.container}> <div style={styles.container}>
{serializeTapeObj(state?.tape || {}).map((num, i) => ( {serializeTapeMap(state?.tape || {}).map((num, i) => (
<Cell value={num} key={i} active={(state?.pointer || 0) === i} /> <Cell value={num} key={i} active={(state?.pointer || 0) === i} />
))} ))}
</div> </div>

179
engines/brainfuck/runtime.ts Normal file
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@ -0,0 +1,179 @@
import { DocumentRange, LanguageEngine, StepExecutionResult } from "../types";
import { BFAstStep, BFInstruction, BFRS, BF_OP } from "./common";
// Default values for internal states
// Factories are used to create new objects on reset
const DEFAULT_AST = (): BFAstStep[] => [];
const DEFAULT_PTR = 0;
const DEFAULT_PC = -1;
const DEFAULT_TAPE = (): { [k: number]: number } => ({});
const DEFAULT_INPUT: string = "";
// Instruction characters
const OP_CHARS = Object.values(BF_OP);
export default class BrainfuckLanguageEngine implements LanguageEngine<BFRS> {
private _ast: BFAstStep[] = DEFAULT_AST();
private _ptr: number = DEFAULT_PTR;
private _tape: { [k: number]: number } = DEFAULT_TAPE();
private _input: string = DEFAULT_INPUT;
private _pc: number = DEFAULT_PC;
resetState() {
this._ast = DEFAULT_AST();
this._ptr = DEFAULT_PTR;
this._tape = DEFAULT_TAPE();
this._input = DEFAULT_INPUT;
this._pc = DEFAULT_PC;
}
prepare(code: string, input: string) {
this._input = input;
this._ast = this.parseCode(code);
}
executeStep(): StepExecutionResult<BFRS> {
// Execute and update program counter
let output: string | undefined = undefined;
if (this._pc !== -1) {
const astStep = this._ast[this._pc];
const opResult = this.processOp(astStep.instr);
this._pc = opResult?.newPc == null ? this._pc + 1 : opResult.newPc;
output = opResult?.output;
} else this._pc += 1;
// Prepare location of next step
let nextStepLocation: DocumentRange | null = null;
if (this._pc < this._ast.length) {
const { line, char } = this._ast[this._pc].location;
const charRange = { start: char, end: char + 1 };
nextStepLocation = { line, charRange };
}
// Prepare and return execution result
const rendererState = { tape: this._tape, pointer: this._ptr };
return { rendererState, nextStepLocation, output };
}
private parseCode(code: string) {
const ast: BFAstStep[] = [];
// Stack to maintain loop counts. Element of stack denotes
// program counter for loop-opening instruction.
const loopStack: number[] = [];
// For each line...
code.split("\n").forEach((line, lIdx) => {
// For each character of this line...
line.split("").forEach((char, cIdx) => {
// Ignore if the character is not an operation
if (!OP_CHARS.includes(char as BF_OP)) return;
// Update loop-tracking stack if it's a loop-char
let jumpTarget = undefined;
if (char === BF_OP.LOOPIN) {
// Push loop start into stack
// Opposite end location will be added at loop close
loopStack.push(ast.length);
} else if (char === BF_OP.LOOPOUT) {
// Get location of loop-opener
jumpTarget = loopStack.pop()!;
// Add closing end location to loop-opener
ast[jumpTarget].instr.param = ast.length;
}
// Add instruction to AST
ast.push({
instr: { type: char as BF_OP, param: jumpTarget },
location: { line: lIdx + 1, char: cIdx + 1 },
});
});
});
return ast;
}
/**
* Process the given instruction and return the updated program counter and
* any output to send to stdout.
*
* If program counter is not returned, counter should be incremented by 1.
*
* @param instr Instruction to apply
* @returns Optional fields for new program counter and step output
*/
private processOp(
instr: BFInstruction
): { newPc?: number; output?: string } | void {
// Pointer-shift operations
if (instr.type === BF_OP.LEFT) this.decrementPtr();
else if (instr.type === BF_OP.RIGHT) this.incrementPtr();
// Current cell modifiers
else if (instr.type === BF_OP.INCR) this.incrementCell(this._ptr);
else if (instr.type === BF_OP.DECR) this.decrementCell(this._ptr);
// Input and output
else if (instr.type === BF_OP.OUT) return { output: this.outputChar() };
else if (instr.type === BF_OP.IN) this.inputChar();
// Looping
else if (instr.type === BF_OP.LOOPIN) {
// Conditionally jump past loop-closer
if (this.getCell(this._ptr) !== 0) return;
return { newPc: instr.param! + 1 };
} else if (instr.type === BF_OP.LOOPOUT) {
// Conditionally jump to loop-opener
if (this.getCell(this._ptr) === 0) return;
return { newPc: instr.param };
} else throw new Error("Unexpected instruction type");
}
/** Output character from current cell */
private outputChar(): string {
const code = this._tape[this._ptr];
return String.fromCharCode(code);
}
/** Input character into current cell */
private inputChar(): void {
if (this._input.length === 0) {
// EOF is treated as a zero
this._tape[this._ptr] = 0;
} else {
// Pop first char of input and set to cell
this._tape[this._ptr] = this._input.charCodeAt(0);
this._input = this._input.slice(1);
}
}
/** Get value of tape cell. Initializes cell if first use */
private getCell(cellId: number): number {
if (!this._tape[cellId]) this._tape[cellId] = 0;
return this._tape[cellId];
}
/** Increment tape cell at specified location */
private incrementCell(cellId: number): void {
if (!this._tape[cellId]) this._tape[cellId] = 0;
this._tape[cellId] += 1;
if (this._tape[cellId] === 128) this._tape[cellId] = -128;
}
/** Decrement tape cell at specified location */
private decrementCell(cellId: number): void {
if (!this._tape[cellId]) this._tape[cellId] = 0;
this._tape[cellId] -= 1;
if (this._tape[cellId] === -129) this._tape[cellId] = 127;
}
/** Move the tape pointer one cell to the right */
private incrementPtr(): void {
this._ptr += 1;
this.getCell(this._ptr); // Init cell if required
}
/** Move the tape pointer one cell to the left */
private decrementPtr(): void {
if (this._ptr <= 0) throw new Error("Ptr out of bounds");
this._ptr -= 1;
this.getCell(this._ptr); // Init cell if required
}
}

1
engines/brainfuck/tests/cat.txt Normal file
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@ -0,0 +1 @@
,[.,]

19
engines/brainfuck/tests/cellsize.txt Normal file
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@ -0,0 +1,19 @@
Calculate the value 256 and test if it's zero
If the interpreter errors on overflow this is where it'll happen
++++++++[>++++++++<-]>[<++++>-]
+<[>-<
Not zero so multiply by 256 again to get 65536
[>++++<-]>[<++++++++>-]<[>++++++++<-]
+>[>
# Print "32"
++++++++++[>+++++<-]>+.-.[-]<
<[-]<->] <[>>
# Print "16"
+++++++[>+++++++<-]>.+++++.[-]<
<<-]] >[>
# Print "8"
++++++++[>+++++++<-]>.[-]<
<-]<
# Print " bit cells"
+++++++++++[>+++>+++++++++>+++++++++>+<<<<-]>-.>-.+++++++.+++++++++++.<.
>>.++.+++++++..<-.>>-

2
engines/brainfuck/tests/helloworld-subzero.txt Normal file
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@ -0,0 +1,2 @@
>++++++++[-<+++++++++>]<.>>+>-[+]++>++>+++[>[->+++<<+++>]<<]>-----.>->
+++..+++.>-.<<+[>[+>+]>>]<--------------.>>.+++.------.--------.>+.>+.

33
engines/brainfuck/tests/helloworld.txt Normal file
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@ -0,0 +1,33 @@
+++++ +++ Set Cell #0 to 8
[
>++++ Add 4 to Cell #1; this will always set Cell #1 to 4
[ as the cell will be cleared by the loop
>++ Add 4*2 to Cell #2
>+++ Add 4*3 to Cell #3
>+++ Add 4*3 to Cell #4
>+ Add 4 to Cell #5
<<<<- Decrement the loop counter in Cell #1
] Loop till Cell #1 is zero
>+ Add 1 to Cell #2
>+ Add 1 to Cell #3
>- Subtract 1 from Cell #4
>>+ Add 1 to Cell #6
[<] Move back to the first zero cell you find; this will
be Cell #1 which was cleared by the previous loop
<- Decrement the loop Counter in Cell #0
] Loop till Cell #0 is zero
The result of this is:
Cell No : 0 1 2 3 4 5 6
Contents: 0 0 72 104 88 32 8
Pointer : ^
>>. Cell #2 has value 72 which is 'H'
>---. Subtract 3 from Cell #3 to get 101 which is 'e'
+++++ ++..+++. Likewise for 'llo' from Cell #3
>>. Cell #5 is 32 for the space
<-. Subtract 1 from Cell #4 for 87 to give a 'W'
<. Cell #3 was set to 'o' from the end of 'Hello'
+++.----- -.----- ---. Cell #3 for 'rl' and 'd'
>>+. Add 1 to Cell #5 gives us an exclamation point
>++. And finally a newline from Cell #6

63
engines/brainfuck/tests/index.test.ts Normal file
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@ -0,0 +1,63 @@
import { readTestProgram, executeProgram } from "../../test-utils";
import { BFRS, serializeTapeMap } from "../common";
import Engine from "../runtime";
/**
* All test programs are picked up from https://esolangs.org/wiki/Brainfuck.
* - Cell cleanup code at end of cell size program is not included.
*/
/**
* Check if actual cell array matches expected cell array.
* Expected cell array must exclude trailing zeros.
* @param cellsMap Map of cell index to value, as provided in execution result.
* @param expected Array of expected cell values, without trailing zeros.
*/
const expectCellsToBe = (cellsMap: BFRS["tape"], expected: number[]) => {
const cells = serializeTapeMap(cellsMap);
expect(cells.length).toBeGreaterThanOrEqual(expected.length);
cells.forEach((value, idx) => {
if (idx < expected.length) expect(value).toBe(expected[idx]);
else expect(value).toBe(0);
});
};
describe("Test programs", () => {
// Standard hello-world program
test("hello world", async () => {
const code = readTestProgram(__dirname, "helloworld");
const result = await executeProgram(new Engine(), code);
expect(result.output).toBe("Hello World!\n");
expect(result.rendererState.pointer).toBe(6);
const expectedCells = [0, 0, 72, 100, 87, 33, 10];
expectCellsToBe(result.rendererState.tape, expectedCells);
});
// Hello-world program using subzero cell values
test("hello world with subzero cell values", async () => {
const code = readTestProgram(__dirname, "helloworld-subzero");
const result = await executeProgram(new Engine(), code);
expect(result.output).toBe("Hello World!\n");
expect(result.rendererState.pointer).toBe(6);
const expectedCells = [72, 0, 87, 0, 100, 33, 10];
expectCellsToBe(result.rendererState.tape, expectedCells);
});
// cat program
test("cat program", async () => {
const code = readTestProgram(__dirname, "cat");
const result = await executeProgram(new Engine(), code, "foo \n bar");
expect(result.output).toBe("foo \n bar");
expect(result.rendererState.pointer).toBe(0);
expectCellsToBe(result.rendererState.tape, []);
});
// Program to calculate cell size
test("cell size calculator", async () => {
const code = readTestProgram(__dirname, "cellsize");
const result = await executeProgram(new Engine(), code);
expect(result.output).toBe("8 bit cells");
expect(result.rendererState.pointer).toBe(4);
expectCellsToBe(result.rendererState.tape, [0, 32, 115, 108, 10]);
});
});

85
engines/deadfish/engine.ts
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@ -1,87 +1,4 @@
import { setupWorker } from "../setup-worker"; import { setupWorker } from "../setup-worker";
import { DocumentRange, LanguageEngine, StepExecutionResult } from "../types"; import DeadfishLanguageEngine from "./runtime";
import { DFAstStep, DFRS, DF_OP } from "./constants";
// Default values for internal states
// Factories are used to create new objects on reset
const DEFAULT_AST = (): DFAstStep[] => [];
const DEFAULT_PC = -1;
const DEFAULT_VALUE = 0;
// Instruction characters
const OP_CHARS = Object.values(DF_OP);
class DeadfishLanguageEngine implements LanguageEngine<DFRS> {
private _ast: DFAstStep[] = DEFAULT_AST();
private _value: number = DEFAULT_VALUE;
private _pc: number = DEFAULT_PC;
resetState() {
this._ast = DEFAULT_AST();
this._value = DEFAULT_VALUE;
this._pc = DEFAULT_PC;
}
prepare(code: string, _input: string) {
this._ast = this.parseCode(code);
}
executeStep(): StepExecutionResult<DFRS> {
// Execute and update program counter
let output: string | undefined = undefined;
if (this._pc !== -1) {
const astStep = this._ast[this._pc];
output = this.processOp(astStep.instr);
}
this._pc += 1;
// Prepare location of next step
let nextStepLocation: DocumentRange | null = null;
if (this._pc < this._ast.length) {
const { line, char } = this._ast[this._pc].location;
const charRange = { start: char, end: char + 1 };
nextStepLocation = { line, charRange };
}
// Prepare and return execution result
const rendererState = { value: this._value };
return { rendererState, nextStepLocation, output };
}
private parseCode(code: string) {
const ast: DFAstStep[] = [];
// For each line...
code.split("\n").forEach((line, lIdx) => {
// For each character of this line...
line.split("").forEach((char, cIdx) => {
if (OP_CHARS.includes(char as DF_OP)) {
ast.push({
instr: char as DF_OP,
location: { line: lIdx + 1, char: cIdx + 1 },
});
}
});
});
return ast;
}
/**
* Process the given instruction and return string to push to output if any.
*
* @param instr Instruction to apply
* @returns String to append to output, if any
*/
private processOp(instr: DF_OP): string | undefined {
if (instr === DF_OP.INCR) ++this._value;
else if (instr === DF_OP.DECR) --this._value;
else if (instr === DF_OP.SQ) this._value = this._value * this._value;
else if (instr === DF_OP.OUT) return this._value.toString();
else throw new Error("Invalid instruction");
if (this._value === -1 || this._value === 256) this._value = 0;
}
}
setupWorker(new DeadfishLanguageEngine()); setupWorker(new DeadfishLanguageEngine());

84
engines/deadfish/runtime.ts Normal file
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@ -0,0 +1,84 @@
import { DocumentRange, LanguageEngine, StepExecutionResult } from "../types";
import { DFAstStep, DFRS, DF_OP } from "./constants";
// Default values for internal states
// Factories are used to create new objects on reset
const DEFAULT_AST = (): DFAstStep[] => [];
const DEFAULT_PC = -1;
const DEFAULT_VALUE = 0;
// Instruction characters
const OP_CHARS = Object.values(DF_OP);
export default class DeadfishLanguageEngine implements LanguageEngine<DFRS> {
private _ast: DFAstStep[] = DEFAULT_AST();
private _value: number = DEFAULT_VALUE;
private _pc: number = DEFAULT_PC;
resetState() {
this._ast = DEFAULT_AST();
this._value = DEFAULT_VALUE;
this._pc = DEFAULT_PC;
}
prepare(code: string, _input: string) {
this._ast = this.parseCode(code);
}
executeStep(): StepExecutionResult<DFRS> {
// Execute and update program counter
let output: string | undefined = undefined;
if (this._pc !== -1) {
const astStep = this._ast[this._pc];
output = this.processOp(astStep.instr);
}
this._pc += 1;
// Prepare location of next step
let nextStepLocation: DocumentRange | null = null;
if (this._pc < this._ast.length) {
const { line, char } = this._ast[this._pc].location;
const charRange = { start: char, end: char + 1 };
nextStepLocation = { line, charRange };
}
// Prepare and return execution result
const rendererState = { value: this._value };
return { rendererState, nextStepLocation, output };
}
private parseCode(code: string) {
const ast: DFAstStep[] = [];
// For each line...
code.split("\n").forEach((line, lIdx) => {
// For each character of this line...
line.split("").forEach((char, cIdx) => {
if (OP_CHARS.includes(char as DF_OP)) {
ast.push({
instr: char as DF_OP,
location: { line: lIdx + 1, char: cIdx + 1 },
});
}
});
});
return ast;
}
/**
* Process the given instruction and return string to push to output if any.
*
* @param instr Instruction to apply
* @returns String to append to output, if any
*/
private processOp(instr: DF_OP): string | undefined {
if (instr === DF_OP.INCR) ++this._value;
else if (instr === DF_OP.DECR) --this._value;
else if (instr === DF_OP.SQ) this._value = this._value * this._value;
else if (instr === DF_OP.OUT) return this._value.toString();
else throw new Error("Invalid instruction");
if (this._value === -1 || this._value === 256) this._value = 0;
}
}

1
engines/deadfish/tests/288.txt Normal file
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diissisdo

3
engines/deadfish/tests/helloworld.txt Normal file
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iisiiiisiiiiiiiioiiiiiiiiiiiiiiiiiiiiiiiiiiiiioiiiiiiiooiiio
dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddo
dddddddddddddddddddddsddoddddddddoiiioddddddoddddddddo

57
engines/deadfish/tests/index.test.ts Normal file
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import { readTestProgram, executeProgram } from "../../test-utils";
// import { BFRS, serializeTapeMap } from "../constants";
import Engine from "../runtime";
/**
* All test programs are picked up from https://esolangs.org/wiki/Brainfuck.
* - Cell cleanup code at end of cell size program is not included.
*/
/**
* Check if actual cell array matches expected cell array.
* Expected cell array must exclude trailing zeros.
* @param cellsMap Map of cell index to value, as provided in execution result.
* @param expected Array of expected cell values, without trailing zeros.
*/
// const expectCellsToBe = (cellsMap: BFRS["tape"], expected: number[]) => {
// const cells = serializeTapeMap(cellsMap);
// expect(cells.length).toBeGreaterThanOrEqual(expected.length);
// cells.forEach((value, idx) => {
// if (idx < expected.length) expect(value).toBe(expected[idx]);
// else expect(value).toBe(0);
// });
// };
describe("Test programs", () => {
// Standard hello-world program
test("hello world", async () => {
const code = readTestProgram(__dirname, "helloworld");
const result = await executeProgram(new Engine(), code);
expect(result.output).toBe("7210110810811132119111114108100");
expect(result.rendererState.value).toBe(100);
});
// Test program 1, output 0
test("output zero (1)", async () => {
const code = readTestProgram(__dirname, "zero1");
const result = await executeProgram(new Engine(), code);
expect(result.output).toBe("0");
expect(result.rendererState.value).toBe(0);
});
// Test program 2, output 0
test("output zero (2)", async () => {
const code = readTestProgram(__dirname, "zero2");
const result = await executeProgram(new Engine(), code);
expect(result.output).toBe("0");
expect(result.rendererState.value).toBe(0);
});
// Test program 3, output 288
test("output 288", async () => {
const code = readTestProgram(__dirname, "288");
const result = await executeProgram(new Engine(), code);
expect(result.output).toBe("288");
expect(result.rendererState.value).toBe(288);
});
});

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iissso

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engines/deadfish/tests/zero2.txt Normal file
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iissisdddddddddddddddddddddddddddddddddo