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package com.seaofnodes.simple;
import com.seaofnodes.simple.evaluator.Evaluator;
import com.seaofnodes.simple.node.StopNode;
import org.junit.Test;
import org.junit.Ignore;
import java.nio.charset.StandardCharsets;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class BrainFuckTest {
@Test
public void testBrainfuck() {
var program = "++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.".getBytes(StandardCharsets.UTF_8);
var encoded = new StringBuilder("u8[] program = new u8[").append(program.length).append("];");
for (int i = 0; i < program.length; i++) {
int value = program[i] & 0xFF;
encoded.append("program[").append(i).append("] = ").append(value).append(";");
}
Parser parser = new Parser(
encoded + """
int pc = 0;
int d = 0;
u8[] data = new u8[100];
u8[] output = new u8[0];
while (pc < program#) {
int command = program[pc];
if (command == 62) {
d = d + 1;
} else if (command == 60) {
d = d - 1;
} else if (command == 43) {
data[d] = data[d] + 1;
} else if (command == 45) {
data[d] = data[d] - 1;
} else if (command == 46) {
u8[] old = output;
output = new u8[output# + 1];
int i = 0;
while (i < old#) {
output[i] = old[i];
i = i + 1;
}
output[i] = data[d];
} else if (command == 44) {
data[d] = 42;
} else if (command == 91) {
if (data[d] == 0) {
int d = 1;
while (d > 0) {
pc = pc + 1;
command = program[pc];
if (command == 91) d = d + 1;
if (command == 93) d = d - 1;
}
}
} else if (command == 93) {
if (data[d] != 0) {
int d = 1;
while (d > 0) {
pc = pc - 1;
command = program[pc];
if (command == 93) d = d + 1;
if (command == 91) d = d - 1;
}
}
}
pc = pc + 1;
}
return output;
""");
StopNode stop = parser.parse(false).iterate(false);
assertEquals("Hello World!\n", Evaluator.evaluate(stop, 0, 10000).toString());
}
}
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