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package com.seaofnodes.simple;
import org.junit.Test;
import static org.junit.Assert.*;
public class Chapter03Test {
@Test
public void testVarDecl() {
CodeGen code = new CodeGen("int a=1; return a;");
code.parse(); assertEquals("return 1;", code.print());
}
@Test
public void testVarAdd() {
CodeGen code = new CodeGen("int a=1; int b=2; return a+b;");
code.parse();
assertEquals("return 3;", code.print());
}
@Test
public void testVarScope() {
CodeGen code = new CodeGen("int a=1; int b=2; int c=0; { int b=3; c=a+b; } return c;");
code.parse();
assertEquals("return 4;", code.print());
}
@Test
public void testVarDist() {
CodeGen code = new CodeGen("int x0=1; int y0=2; int x1=3; int y1=4; return (x0-x1)*(x0-x1) + (y0-y1)*(y0-y1); ");
code.parse();
assertEquals("return 8;", code.print());
}
@Test
public void testSelfAssign() {
try {
new CodeGen("int a=a; return a;").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Undefined name 'a'",e.getMessage());
}
}
@Test
public void testRedeclareVar() {
try {
new CodeGen("int a=1; int b=2; int c=0; int b=3; c=a+b;").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Redefining name 'b'",e.getMessage());
}
}
@Test
public void testBad1() {
try {
new CodeGen("int a=1; int b=2; int !c=0; { int b=3; c=a+b;").parse();
fail();
} catch( RuntimeException e ) {
assertEquals("Syntax error, expected }: ",e.getMessage());
}
}
}
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