public void EmptyForStatement()
{
var source = @"for(var i = 0; i < 10; i = i + 1) {}";
var code = CreateCode(source);
var expected = @"
DECL i
i = 0
LABEL #0
IF i < 10 JUMP #1
JUMP #2
LABEL #1
LABEL #3
i = i + 1
JUMP #0
LABEL #2";
Assert.AreEqual(10, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void ConditionalExpressionInsideIfStatement()
{
var source = @"if((a == b ? 1 : 0) > 0) {}";
var code = _CreateCode(source);
var expected = @"
DECL $temp_0
IF a == b JUMP #0
$temp_0 = 0
JUMP #1
LABEL #0
$temp_0 = 1
LABEL #1
IF $temp_0 > 0 JUMP #2
JUMP #3
LABEL #2
LABEL #3";
Assert.AreEqual(11, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void ForStatementWithMultipleVariables()
{
var source = @"for(i = 5, j = 0; i < 100; i = i + 2, j++) {}";
var code = CreateCode(source);
var expected = @"
i = 5
j = 0
LABEL #0
IF i < 100 JUMP #1
JUMP #2
LABEL #1
LABEL #3
i = i + 2
j = j + 1
JUMP #0
LABEL #2";
Assert.AreEqual(11, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void ForStatementWithoutSuccessor()
{
var source = @"for(i = 5; i < 100; i = i + 2) { var x = 1; }";
var code = CreateCode(source);
var expected = @"
i = 5
LABEL #0
IF i < 100 JUMP #1
JUMP #2
LABEL #1
DECL x
x = 1
LABEL #3
i = i + 2
JUMP #0
LABEL #2";
Assert.AreEqual(11, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void ComplexCondition()
{
var source = @"if(x/10 + x%5 - 10 > 0.0) { x++; }";
var code = _CreateCode(source);
var expected = @"
DECL $temp_0
$temp_0 = x / 10
DECL $temp_1
$temp_1 = x % 5
DECL $temp_2
$temp_2 = $temp_0 + $temp_1
DECL $temp_3
$temp_3 = $temp_2 - 10
IF $temp_3 > 0 JUMP #0
JUMP #1
LABEL #0
x = x + 1
LABEL #1";
Assert.AreEqual(13, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void ForStatementWithSuccessor()
{
var source = @"for(int i = 0; i < 100; i++) { var x = 1; } y = 5;";
var code = CreateCode(source);
var expected = @"
DECL i
i = 0
LABEL #0
IF i < 100 JUMP #1
JUMP #2
LABEL #1
DECL x
x = 1
LABEL #3
i = i + 1
JUMP #0
LABEL #2
y = 5";
Assert.AreEqual(13, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}