public void EmitSwitch_EmitsProvidedInstructions(int value)
{
var method = new DynamicMethod("Test", typeof(int), new Type[0]);
var generator = method.GetILGenerator();
var subject = new ILGeneratorWrapper(generator);
// Act
var endOfMethod = subject.DefineLabel();
var labels = new[] { subject.DefineLabel(), subject.DefineLabel() };
subject.Emit(OpCodes.Ldc_I4_0);
subject.Emit(OpCodes.Switch, labels);
subject.MarkLabel(labels[0]);
subject.Emit(OpCodes.Ldc_I4, value);
subject.Emit(OpCodes.Br_S, endOfMethod);
subject.MarkLabel(labels[1]);
subject.Emit(OpCodes.Ldc_I4_8, value);
subject.Emit(OpCodes.Br_S, endOfMethod);
subject.MarkLabel(endOfMethod);
subject.Emit(OpCodes.Ret);
int result = (int)method.Invoke(null, new object[0]);
// Assert
Assert.AreEqual(value, result);
}
public void EmitFloat_EmitsProvidedInstructions(float value)
{
var method = new DynamicMethod("Test", typeof(float), new Type[0]);
var generator = method.GetILGenerator();
var subject = new ILGeneratorWrapper(generator);
// Act
subject.Emit(OpCodes.Ldc_R4, value);
subject.Emit(OpCodes.Ret);
float result = (float)method.Invoke(null, new object[0]);
// Assert
Assert.AreEqual(value, result);
}
public void EmitString_EmitsProvidedInstructions(string message)
{
var method = new DynamicMethod("Test", typeof(string), new Type[0]);
var generator = method.GetILGenerator();
var subject = new ILGeneratorWrapper(generator);
// Act
subject.Emit(OpCodes.Ldstr, message);
subject.Emit(OpCodes.Ret);
string result = (string)method.Invoke(null, new object[0]);
// Assert
Assert.AreEqual(message, result);
}
public void DeclareLocal_EmitsProvidedInstructions(byte value)
{
var method = new DynamicMethod("Test", typeof(byte), new Type[0]);
var generator = method.GetILGenerator();
var subject = new ILGeneratorWrapper(generator);
// Act
var local = subject.DeclareLocal(typeof(byte), false);
subject.Emit(OpCodes.Ldc_I4_S, value);
subject.Emit(OpCodes.Stloc, local);
subject.Emit(OpCodes.Ldloc, local);
subject.Emit(OpCodes.Ret);
byte result = (byte)method.Invoke(null, new object[0]);
// Assert
Assert.AreEqual(value, result);
}
public void EmitBranch_EmitsProvidedInstructions(int value)
{
var method = new DynamicMethod("Test", typeof(int), new Type[0]);
var generator = method.GetILGenerator();
var subject = new ILGeneratorWrapper(generator);
// Act
var label = subject.DefineLabel();
subject.Emit(OpCodes.Ldc_I4, value);
subject.Emit(OpCodes.Br, label);
subject.Emit(OpCodes.Ldc_I4, 123);
subject.MarkLabel(label);
subject.Emit(OpCodes.Ret);
int result = (int)method.Invoke(null, new object[0]);
// Assert
Assert.AreEqual(value, result);
}
