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package com.seaofnodes.simple;
import com.seaofnodes.simple.node.*;
import com.seaofnodes.simple.type.TypeInteger;
import org.junit.Test;
import static org.junit.Assert.*;
public class Chapter02Test {
@Test
public void testParseGrammar() {
Parser parser = new Parser("return 1+2*3+-5;");
Node._disablePeephole = true; // disable peephole so we can observe full graph
StopNode ret = parser.parse();
assertEquals("return (1+((2*3)+(-5)));", ret.print());
GraphVisualizer gv = new GraphVisualizer();
System.out.println(gv.generateDotOutput(parser));
Node._disablePeephole = false;
}
@Test
public void testAddPeephole() {
Parser parser = new Parser("return 1+2;");
StopNode ret = parser.parse();
assertEquals("return 3;", ret.print());
}
@Test
public void testSubPeephole() {
Parser parser = new Parser("return 1-2;");
StopNode ret = parser.parse();
assertEquals("return -1;", ret.print());
}
@Test
public void testMulPeephole() {
Parser parser = new Parser("return 2*3;");
StopNode ret = parser.parse();
assertEquals("return 6;", ret.print());
}
@Test
public void testDivPeephole() {
Parser parser = new Parser("return 6/3;");
StopNode ret = parser.parse();
assertEquals("return 2;", ret.print());
}
@Test
public void testMinusPeephole() {
Parser parser = new Parser("return 6/-3;");
StopNode ret = parser.parse();
assertEquals("return -2;", ret.print());
}
@Test
public void testExample() {
Parser parser = new Parser("return 1+2*3+-5;");
StopNode ret = parser.parse();
assertEquals("return 2;", ret.print());
GraphVisualizer gv = new GraphVisualizer();
System.out.println(gv.generateDotOutput(parser));
}
}
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