public void TestLetStatements()
{
var data = new EvalIntegerStruct[2];
data[0] = new EvalIntegerStruct("let a = 5;", 5);
data[1] = new EvalIntegerStruct("let a = 2; let b = 5; let c = a + b;", 7);
for (var i = 0; i < data.Length; i++)
{
var evaluated = TestEval(data[i].Input);
Assert.True(TestIntegerObjects(evaluated, data[i].Expected));
}
}
public void TestFunctionApp()
{
var data = new EvalIntegerStruct[2];
data[0] = new EvalIntegerStruct("let identity = fn(x) { x; }; identity(5);", 5);
data[1] = new EvalIntegerStruct("let add = fn(x, y) { x + y; }; add(5 + 5, add(5, 5));", 20);
for (var i = 0; i < data.Length; i++)
{
var evaluated = TestEval(data[i].Input);
Assert.True(TestIntegerObjects(evaluated, data[i].Expected));
}
}
public void TestIfElseExpression()
{
var data = new EvalIntegerStruct[6];
data[0] = new EvalIntegerStruct("if (true) {10};", 10);
data[1] = new EvalIntegerStruct("if (false) {5};", null);
data[2] = new EvalIntegerStruct("if (1 > 2) {10} else {5};", 5);
data[3] = new EvalIntegerStruct("if (1 < 2) {10};", 10);
data[4] = new EvalIntegerStruct("if (1) {1};", 1);
data[5] = new EvalIntegerStruct("if(false) {10};", null);
for (var i = 0; i < data.Length; i++)
{
var evaluated = TestEval(data[i].Input);
Assert.True(data[i].Expected == null
? TestNullObjects(evaluated)
: TestIntegerObjects(evaluated, data[i].Expected));
}
}
public void TestReturnStatements()
{
var data = new EvalIntegerStruct[5];
data[0] = new EvalIntegerStruct("return 10;", 10);
data[1] = new EvalIntegerStruct("return 10; 9;", 10);
data[2] = new EvalIntegerStruct("return 5 * 5; 77;", 25);
data[3] = new EvalIntegerStruct("77; return 2 * 2; 88;", 4); // TODO: Fix this.
data[4] = new EvalIntegerStruct(@"
if (25 > 5) {
if (10 > 2) {
return 77;
}
}
", 77);
for (var i = 0; i < data.Length; i++)
{
var evaluated = TestEval(data[i].Input);
Assert.True(TestIntegerObjects(evaluated, data[i].Expected));
}
}
public void TestIntegerExpression()
{
var data = new EvalIntegerStruct[12];
data[0] = new EvalIntegerStruct("5;", 5);
data[1] = new EvalIntegerStruct("7;", 7);
data[2] = new EvalIntegerStruct("-5;", -5);
data[3] = new EvalIntegerStruct("-7;", -7);
data[4] = new EvalIntegerStruct("1 + 1;", 2);
data[5] = new EvalIntegerStruct("23 + 7;", 30);
data[6] = new EvalIntegerStruct("1 - 1;", 0);
data[7] = new EvalIntegerStruct("25 - 5;", 20);
data[8] = new EvalIntegerStruct("1 * 1;", 1);
data[9] = new EvalIntegerStruct("6 * 6;", 36);
data[10] = new EvalIntegerStruct("49 / 7;", 7);
data[11] = new EvalIntegerStruct("100 / 10;", 10);
for (var i = 0; i < data.Length; i++)
{
var evaluated = TestEval(data[i].Input);
Assert.True(TestIntegerObjects(evaluated, data[i].Expected));
}
}
