def test_sigmoid_expr():
expr = ast.SigmoidExpr(ast.NumVal(2.0))
interpreter = JavascriptInterpreter()
expected_code = """
function score(input) {
return sigmoid(2.0);
}
function sigmoid(x) {
if (x < 0.0) {
let z = Math.exp(x);
return z / (1.0 + z);
}
return 1.0 / (1.0 + Math.exp(-x));
}
"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_if_expr():
expr = ast.IfExpr(
ast.CompExpr(ast.NumVal(1), ast.FeatureRef(0), ast.CompOpType.EQ),
ast.NumVal(2), ast.NumVal(3))
expected_code = """
function score(input) {
var var0;
if ((1.0) === (input[0])) {
var0 = 2.0;
} else {
var0 = 3.0;
}
return var0;
}
"""
interpreter = JavascriptInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_nested_condition():
left = ast.BinNumExpr(
ast.IfExpr(
ast.CompExpr(ast.NumVal(1), ast.NumVal(1), ast.CompOpType.EQ),
ast.NumVal(1), ast.NumVal(2)), ast.NumVal(2), ast.BinNumOpType.ADD)
bool_test = ast.CompExpr(ast.NumVal(1), left, ast.CompOpType.EQ)
expr_nested = ast.IfExpr(bool_test, ast.FeatureRef(2), ast.NumVal(2))
expr = ast.IfExpr(bool_test, expr_nested, ast.NumVal(2))
expected_code = """
function score(input) {
var var0;
var var1;
if ((1.0) == (1.0)) {
var1 = 1.0;
} else {
var1 = 2.0;
}
if ((1.0) == ((var1) + (2.0))) {
var var2;
if ((1.0) == (1.0)) {
var2 = 1.0;
} else {
var2 = 2.0;
}
if ((1.0) == ((var2) + (2.0))) {
var0 = input[2];
} else {
var0 = 2.0;
}
} else {
var0 = 2.0;
}
return var0;
}
"""
interpreter = JavascriptInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_multi_output():
expr = ast.IfExpr(
ast.CompExpr(ast.NumVal(1), ast.NumVal(1), ast.CompOpType.EQ),
ast.VectorVal([ast.NumVal(1), ast.NumVal(2)]),
ast.VectorVal([ast.NumVal(3), ast.NumVal(4)]))
expected_code = """
function score(input) {
var var0;
if ((1.0) == (1.0)) {
var0 = [1.0, 2.0];
} else {
var0 = [3.0, 4.0];
}
return var0;
}
"""
interpreter = JavascriptInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)