public void IfElseIfElseStatement()
{
var source = @"
if(x > 5) {
more = 1;
} else if(x < 5) {
less = 1;
} else {
equal = 1;
}";
var code = CreateCode(source);
var expected = @"
IF x > 5 JUMP #0
IF x < 5 JUMP #1
equal = 1
JUMP #2
LABEL #1
less = 1
LABEL #2
JUMP #3
LABEL #0
more = 1
LABEL #3";
Assert.AreEqual(11, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void AllowsLongChainOfReadOnlyFields()
{
var source = @"
class Test {
private static readonly C c = new C();
public void Run() {
var v = Test.c.Value.Value.Value;
}
}
class A {
public readonly int Value;
}
class B {
public readonly A Value;
}
class C {
public readonly B Value;
}";
var semanticModel = DocumentFactory.Create().CreateSemanticModel(source);
var method = semanticModel.SyntaxTree.GetRoot().DescendantNodes()
.OfType <MethodDeclarationSyntax>()
.Single();
var code = CodeFactory.Create(method.Body, semanticModel);
var expected = @"
DECL v
v = \literal";
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void ForStatementWithoutConditionButConditionalBreak()
{
var source = @"
for(var i = 0; ; ++i) {
if(i > 3) {
break;
}
}";
var code = CreateCode(source);
var expected = @"
DECL i
i = 0
LABEL #0
JUMP #1
JUMP #2
LABEL #1
IF i > 3 JUMP #3
JUMP #4
LABEL #3
JUMP #2
LABEL #4
LABEL #5
i = i + 1
JUMP #0
LABEL #2";
Assert.AreEqual(15, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void NestedForStatement()
{
var source = @"
for(int i = 0; i < 100; i++) {
for(var j = 0; j < 100; j += 5) {
x = x + 0;
}
}";
var code = CreateCode(source);
var expected = @"
DECL i
i = 0
LABEL #0
IF i < 100 JUMP #1
JUMP #2
LABEL #1
DECL j
j = 0
LABEL #3
IF j < 100 JUMP #4
JUMP #5
LABEL #4
x = x + 0
LABEL #6
j = j + 5
JUMP #3
LABEL #5
LABEL #7
i = i + 1
JUMP #0
LABEL #2";
Assert.AreEqual(21, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void ForStatementWithContinue()
{
var source = @"
for(var i = 0; i < 10; ++i) {
if(i%4 == 0) {
continue;
}
var x = 0;
}";
var code = CreateCode(source);
var expected = @"
DECL i
i = 0
LABEL #0
IF i < 10 JUMP #1
JUMP #2
LABEL #1
IF i % 4 == 0 JUMP #3
JUMP #4
LABEL #3
JUMP #5
LABEL #4
DECL x
x = 0
LABEL #5
i = i + 1
JUMP #0
LABEL #2";
Assert.AreEqual(17, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void DoStatementWithBreak()
{
var source = @"
do {
x = 5;
if(i > 0) {
break;
}
i += 1;
} while(i < 100);";
var code = CreateCode(source);
var expected = @"
LABEL #0
x = 5
IF i > 0 JUMP #1
JUMP #2
LABEL #1
JUMP #3
LABEL #2
i = i + 1
LABEL #4
IF i < 100 JUMP #0
LABEL #3";
Assert.AreEqual(11, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void NestedConditionalExpressions()
{
var source = @"var x = a > 0 ? 1 : (a < 0 ? 1 : 0);";
var code = _CreateCode(source);
var expected = @"
DECL x
DECL $temp_0
IF a > 0 JUMP #0
DECL $temp_1
IF a < 0 JUMP #1
$temp_1 = 0
JUMP #2
LABEL #1
$temp_1 = 1
LABEL #2
$temp_0 = $temp_1
JUMP #3
LABEL #0
$temp_0 = 1
LABEL #3
x = $temp_0";
Assert.AreEqual(16, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void WhileStatementWithContinue()
{
var source = @"
while(i < 100) {
if(i%2 == 0) {
continue;
}
}";
var code = CreateCode(source);
var expected = @"
LABEL #0
IF i < 100 JUMP #1
JUMP #2
LABEL #1
IF i % 2 == 0 JUMP #3
JUMP #4
LABEL #3
JUMP #0
LABEL #4
JUMP #0
LABEL #2";
Assert.AreEqual(11, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void MethodWithReturnValueAndBranchedReturnStatement()
{
var source = @"
int Method1(int x) {
if(x > 0) {
return 0;
}
return x;
}";
var code = CreateCode(source, "Method1");
var expected = @"
DECL x
x = $arg_Method1_0
DECL $result_Method1
IF x > 0 JUMP #0
JUMP #1
LABEL #0
$result_Method1 = 0
JUMP #2
LABEL #1
$result_Method1 = x
JUMP #2
LABEL #2";
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void NestedWhileStatement()
{
var source = @"
while(i < 100) {
while(j < 100) {
j = j + 1;
}
i = i + 1;
}";
var code = CreateCode(source);
var expected = @"
LABEL #0
IF i < 100 JUMP #1
JUMP #2
LABEL #1
LABEL #3
IF j < 100 JUMP #4
JUMP #5
LABEL #4
j = j + 1
JUMP #3
LABEL #5
i = i + 1
JUMP #0
LABEL #2";
Assert.AreEqual(14, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void NestedDoStatement()
{
var source = @"
do {
do {
j = j + 1;
} while(j < 100);
i = i + 1;
} while(i < 100);";
var code = CreateCode(source);
var expected = @"
LABEL #0
LABEL #1
j = j + 1
LABEL #2
IF j < 100 JUMP #1
LABEL #3
i = i + 1
LABEL #4
IF i < 100 JUMP #0
LABEL #5";
Assert.AreEqual(10, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void DoStatementWithContinue()
{
var source = @"
do {
x = 4;
if(i != 5) {
continue;
}
x = 5;
} while(i < 100);";
var code = CreateCode(source);
var expected = @"
LABEL #0
x = 4
IF i != 5 JUMP #1
JUMP #2
LABEL #1
JUMP #3
LABEL #2
x = 5
LABEL #3
IF i < 100 JUMP #0
LABEL #4";
Assert.AreEqual(11, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void NestedIfElseStatement()
{
var source = @"
if(1 == 5) {
if(1 == 1) {
x = 0;
} else {
y = 2;
}
} else {
x = 5;
}";
var code = CreateCode(source);
var expected = @"
IF 1 == 5 JUMP #0
x = 5
JUMP #1
LABEL #0
IF 1 == 1 JUMP #2
y = 2
JUMP #3
LABEL #2
x = 0
LABEL #3
LABEL #1";
Assert.AreEqual(11, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void AssignmentsAndDeclarationsWithMultipleNestings()
{
var source = @"
var x = 0;
var y = 10;
x = y;
y = (5 + x) * y + x * y / y";
var code = _CreateCode(source);
var expected = @"
DECL x
x = 0
DECL y
y = 10
x = y
DECL $temp_0
$temp_0 = 5 + x
DECL $temp_1
$temp_1 = $temp_0 * y
DECL $temp_2
$temp_2 = x * y
DECL $temp_3
$temp_3 = $temp_2 / y
y = $temp_1 + $temp_3";
Assert.AreEqual(14, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void MethodWithoutParametersAndEmptyBody()
{
var source = @"void Test() {}";
var code = CreateCode(source, "Test");
Assert.AreEqual(1, code.Root.Count);
Assert.AreEqual("LABEL #0", CodeStringifier.Generate(code));
}
public void WriteAccessToArrayWithVariableIndex()
{
var source = @"shared[x] = 1;";
var code = _CreateCode(source);
var expected = @"shared[x] = 1";
Assert.AreEqual(1, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void DirectInvocationWithArguments()
{
var source = @"Method(1 + 1, a, x, 4 * b);";
var code = CreateCode(source);
var expected = @"INVOKE Method(1 + 1, a, x, 4 * b)";
Assert.AreEqual(1, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void SingleDeclarationWithoutInitializer()
{
var source = @"int variable;";
var code = CreateCode(source);
var expected = @"DECL variable";
Assert.AreEqual(1, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void SingleAssignment()
{
var source = @"variable = 2;";
var code = CreateCode(source);
var expected = @"variable = 2";
Assert.AreEqual(1, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void EmptyBlock()
{
var source = @"";
var code = CreateCode(source);
var expected = @"";
Assert.AreEqual(0, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void NegativeVariableAssignment()
{
var source = @"x = -y;";
var code = _CreateCode(source);
var expected = @"x = -y";
Assert.AreEqual(1, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void DeclarationWithBooleanConstant()
{
var source = @"var variable = true;";
var code = CreateCode(source);
var expected = @"
DECL variable
variable = \literal";
Assert.AreEqual(2, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void InvocationNestedInAssignment()
{
var source = @"var result = First(x) + Second(1, 2);";
var code = CreateCode(source);
var expected = @"
DECL result
result = First(x) + Second(1, 2)";
Assert.AreEqual(2, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void SingleDeclaration()
{
var source = @"var variable = 1;";
var code = CreateCode(source);
var expected = @"
DECL variable
variable = 1";
Assert.AreEqual(2, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void MethodWithExpressionBodyWithoutArguments()
{
var source = @"int Method1() => 5;";
var code = CreateCode(source, "Method1");
var expected = @"
DECL $result_Method1
$result_Method1 = 5
LABEL #0";
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void DeclarationWithConditionalExpression()
{
var source = @"var variable = a > 0 ? a : 0;";
var code = CreateCode(source);
var expected = @"
DECL variable
variable = a > 0 ? a : 0";
Assert.AreEqual(2, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void DeclarationWithConstantBinaryExpression()
{
var source = @"var x = 5 * 4";
var code = _CreateCode(source);
var expected = @"
DECL x
x = 5 * 4";
Assert.AreEqual(2, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void NegativeConstantDeclaration()
{
var source = @"var x = -10;";
var code = _CreateCode(source);
var expected = @"
DECL x
x = -10";
Assert.AreEqual(2, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void WriteAccessToArrayWithExpressionIndex()
{
var source = @"shared[x + 1] = 1;";
var code = _CreateCode(source);
var expected = @"
DECL $temp_0
$temp_0 = x + 1
shared[$temp_0] = 1";
Assert.AreEqual(3, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}
public void DirectMethodInvocationWithAddExpressionAsArgument()
{
var source = @"Method(1 + 3);";
var code = _CreateCode(source);
var expected = @"
DECL $temp_0
$temp_0 = 1 + 3
INVOKE Method($temp_0)";
Assert.AreEqual(3, InstructionCounter.Count(code));
Assert.AreEqual(expected.Trim(), CodeStringifier.Generate(code));
}