def test_bin_vector_num_expr():
expr = ast.BinVectorNumExpr(ast.VectorVal([ast.NumVal(1),
ast.NumVal(2)]), ast.NumVal(1),
ast.BinNumOpType.MUL)
interpreter = interpreters.JavascriptInterpreter()
expected_code = """
function score(input) {
return mulVectorNumber([1, 2], 1);
}
function addVectors(v1, v2) {
let result = new Array(v1.length);
for (let i = 0; i < v1.length; i++) {
result[i] = v1[i] + v2[i];
}
return result;
}
function mulVectorNumber(v1, num) {
let result = new Array(v1.length);
for (let i = 0; i < v1.length; i++) {
result[i] = v1[i] * num;
}
return result;
}
"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_dependable_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)
right = ast.BinNumExpr(ast.NumVal(1), ast.NumVal(2), ast.BinNumOpType.DIV)
bool_test = ast.CompExpr(left, right, ast.CompOpType.GTE)
expr = ast.IfExpr(bool_test, ast.NumVal(1), ast.FeatureRef(0))
expected_code = """
function score(input) {
var var0;
var var1;
if ((1) == (1)) {
var1 = 1;
} else {
var1 = 2;
}
if (((var1) + (2)) >= ((1) / (2))) {
var0 = 1;
} else {
var0 = input[0];
}
return var0;
}
"""
interpreter = interpreters.JavascriptInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_raw_array():
expr = ast.VectorVal([ast.NumVal(3), ast.NumVal(4)])
expected_code = """
function score(input) {
return [3, 4];
}
"""
interpreter = interpreters.JavascriptInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_log1p_expr():
expr = ast.Log1pExpr(ast.NumVal(2.0))
interpreter = interpreters.JavascriptInterpreter()
expected_code = """
function score(input) {
return Math.log1p(2.0);
}
"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_pow_expr():
expr = ast.PowExpr(ast.NumVal(2.0), ast.NumVal(3.0))
interpreter = interpreters.JavascriptInterpreter()
expected_code = """
function score(input) {
return Math.pow(2.0, 3.0);
}
"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_abs_expr():
expr = ast.AbsExpr(ast.NumVal(-1.0))
interpreter = interpreters.JavascriptInterpreter()
expected_code = """
function score(input) {
return Math.abs(-1.0);
}
"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_reused_expr():
reused_expr = ast.ExpExpr(ast.NumVal(1.0), to_reuse=True)
expr = ast.BinNumExpr(reused_expr, reused_expr, ast.BinNumOpType.DIV)
interpreter = interpreters.JavascriptInterpreter()
expected_code = """
function score(input) {
var var0;
var0 = Math.exp(1.0);
return (var0) / (var0);
}
"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_bin_num_expr():
expr = ast.BinNumExpr(
ast.BinNumExpr(ast.FeatureRef(0), ast.NumVal(-2),
ast.BinNumOpType.DIV), ast.NumVal(2),
ast.BinNumOpType.MUL)
interpreter = interpreters.JavascriptInterpreter()
expected_code = """
function score(input) {
return ((input[0]) / (-2)) * (2);
}
"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def export_to_javascript(model, indent=4):
"""
Generates a Javascript code representation of the given model.
Parameters
----------
model : object
The model object that should be transpiled into code.
indent : int, optional
The size of indents in the generated code.
Returns
-------
code : string
"""
interpreter = interpreters.JavascriptInterpreter(indent=indent)
return _export(model, interpreter)
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) == (1)) {
var1 = 1;
} else {
var1 = 2;
}
if ((1) == ((var1) + (2))) {
var var2;
if ((1) == (1)) {
var2 = 1;
} else {
var2 = 2;
}
if ((1) == ((var2) + (2))) {
var0 = input[2];
} else {
var0 = 2;
}
} else {
var0 = 2;
}
return var0;
}
"""
interpreter = interpreters.JavascriptInterpreter()
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))
interpreter = interpreters.JavascriptInterpreter()
expected_code = """
function score(input) {
var var0;
if ((1) == (input[0])) {
var0 = 2;
} else {
var0 = 3;
}
return var0;
}
"""
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) == (1)) {
var0 = [1, 2];
} else {
var0 = [3, 4];
}
return var0;
}
"""
interpreter = interpreters.JavascriptInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
