@Test
public void simple() {
Expression program = new NopExpression();
Program p = new ExpressionProgramBuilder().buildProgram(program);
Assert.assertEquals("0: end\n", p.toString());
}
@Test
public void sequence() {
SeqExpression program =
new SeqExpression(new VariableExpression("a"), new VariableExpression("b"));
Program p = new ExpressionProgramBuilder().buildProgram(program);
Assert.assertEquals("0: read a\n" + "1: read b\n" + "2: end\n", p.toString());
}
@Test
public void whileExpression() {
Expression program =
new WhileExpression(
new VariableExpression("a"), new AssignmentExpression("b", new NopExpression()));
Program p = new ExpressionProgramBuilder().buildProgram(program);
Assert.assertEquals(
"0: read a\n" + "1: ifjump 3\n" + "2: write b\n" + "3: end\n", p.toString());
}
@Test
public void ifExpression() {
Expression program =
new IfExpression(
new NopExpression(),
new AssignmentExpression("a", new NopExpression()),
new AssignmentExpression("b", new NopExpression()));
Program p = new ExpressionProgramBuilder().buildProgram(program);
Assert.assertEquals(
"0: ifjump 3\n" + "1: write a\n" + "2: jump 4\n" + "3: write b\n" + "4: end\n",
p.toString());
}
@Test
public void programWithTryFinally() {
Program program =
new SimpleProgramBuilder()
.emitTry()
.emitRead("x")
.emitFinally()
.emitRead("x")
.emitEndTry()
.buildProgram();
Assert.assertEquals(
"0: try\n" + "1: read x\n" + "2: finally\n" + "3: read x\n" + "4: endTry\n" + "5: end\n",
program.toString());
}
@Test
public void simpleProgramBuilding() {
Program program = new SimpleProgramBuilder().emitRead("x").emitWrite("y").buildProgram();
Assert.assertEquals("0: read x\n" + "1: write y\n" + "2: end\n", program.toString());
}