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package com.seaofnodes.simple;
import com.seaofnodes.simple.node.*;
import org.junit.Test;
import static org.junit.Assert.*;
public class Chapter01Test {
@Test
public void testSimpleProgram() {
Parser parser = new Parser("return 1;");
ReturnNode ret = parser.parse();
StartNode start = Parser.START;
assertEquals(start, ret.ctrl());
Node expr = ret.expr();
if( expr instanceof ConstantNode con ) {
assertEquals(start,con.in(0));
assertEquals(1, con._value);
} else {
fail();
}
}
@Test
public void testZero() {
Parser parser = new Parser("return 0;");
parser.parse();
StartNode start = Parser.START;
for( Node use : start._outputs )
if( use instanceof ConstantNode con )
assertEquals(0,con._value);
}
@Test
public void testBad1() {
try {
new Parser("ret").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Syntax error, expected a statement: ret",e.getMessage());
}
}
@Test
public void testBad2() {
try {
new Parser("return 0123;").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Syntax error: integer values cannot start with '0'",e.getMessage());
}
}
@Test
public void testBad3() {
try {
new Parser("return --12;").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Syntax error, expected integer literal",e.getMessage());
}
}
@Test
public void testBad4() {
try {
new Parser("return 100").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Syntax error, expected ;: ",e.getMessage());
}
}
// Negative numbers require unary operator support that is not in scope
@Test
public void testBad5() {
try {
new Parser("return -100;").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Syntax error, expected integer literal",e.getMessage());
}
}
@Test
public void testBad6() {
try {
new Parser("return100").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Syntax error, expected a statement: return100",e.getMessage());
}
}
@Test
public void testBad7() {
try {
new Parser("return 1;}").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Syntax error, unexpected }",e.getMessage());
}
}
}
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