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ant/tests/test_var_hoisting.cjs
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test_var_hoisting.cjs
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// Test var hoisting behavior
// In JavaScript, 'var' declarations are hoisted to the function scope (or global scope)
// regardless of where they are declared within blocks
console.log("=== Test 1: Basic var hoisting in blocks ===");
{
var x = 10;
}
console.log("x should be 10:", x);
console.log("\n=== Test 2: var in nested blocks ===");
{
{
{
var y = 20;
}
}
}
console.log("y should be 20:", y);
console.log("\n=== Test 3: var in if blocks ===");
if (true) {
var z = 30;
}
console.log("z should be 30:", z);
console.log("\n=== Test 4: var in function scope ===");
function testFunc() {
{
var a = 40;
}
return a;
}
console.log("a inside function should be 40:", testFunc());
console.log("\n=== Test 5: var in for loop ===");
for (var i = 0; i < 3; i++) {
// loop body
}
console.log("i should be 3:", i);
console.log("\n=== Test 6: var in with statement ===");
var obj = { prop: 100 };
with (obj) {
var w = 50;
}
console.log("w should be 50:", w);
console.log("\n=== Test 7: Multiple var declarations in different blocks ===");
{
var m = 1;
}
{
var n = 2;
}
console.log("m should be 1, n should be 2:", m, n);
console.log("\n=== Test 8: var reassignment across blocks ===");
{
var p = 100;
}
{
p = 200;
}
console.log("p should be 200:", p);
console.log("\n=== Test 9: var in while loop ===");
var count = 0;
while (count < 2) {
var q = count;
count++;
}
console.log("q should be 1:", q);
console.log("\n=== Test 10: Function scope isolation ===");
function outer() {
{
var funcVar = 77;
}
return funcVar;
}
console.log("funcVar inside function should be 77:", outer());
// funcVar should not be accessible here (would be undefined in global scope)
console.log("\n=== Test 11: var vs let comparison ===");
{
var varTest = "var-value";
let letTest = "let-value";
}
console.log("varTest should be 'var-value':", varTest);
try {
console.log("letTest should cause error:", letTest);
} catch (e) {
console.log("letTest correctly not accessible (block-scoped)");
}
console.log("\n=== All var hoisting tests completed ===");

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