template_literals.cjs
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	// Template Literal Tests
	// Testing backtick (`) strings and ${} interpolation
	//
	// This test suite validates the template literal functionality including:
	// - Basic template literals with backticks
	// - Variable interpolation with ${}
	// - Expression evaluation within templates
	// - Multiple and consecutive interpolations
	// - Type conversion (numbers, booleans, objects)
	// - Multiline strings
	// - Escape sequences
	// - Complex expressions and nested calculations
	// - Integration with functions and methods
	// - Edge cases (empty, null, undefined)
	// - Practical use cases (URLs, receipts, error messages)

	console.log("=== Template Literal Tests ===\n");

	// Test 1: Basic template literal
	console.log("Test 1: Basic template literal");
	let basic = `Hello, World!`;
	console.log(" Result:", basic);
	console.log(" Type:", typeof basic);
	console.log(" Length:", basic.length);

	// Test 2: Single variable interpolation
	console.log("\nTest 2: Single variable interpolation");
	let name = "Alice";
	let greeting = `Hello, ${name}!`;
	console.log(" Name:", name);
	console.log(" Result:", greeting);

	// Test 3: Multiple variable interpolations
	console.log("\nTest 3: Multiple variable interpolations");
	let firstName = "John";
	let lastName = "Doe";
	let fullName = `${firstName} ${lastName}`;
	console.log(" First:", firstName);
	console.log(" Last:", lastName);
	console.log(" Full:", fullName);

	// Test 4: Numeric expressions
	console.log("\nTest 4: Numeric expressions");
	let a = 10;
	let b = 20;
	let sum = `${a} + ${b} = ${a + b}`;
	let product = `${a} * ${b} = ${a * b}`;
	let division = `${b} / ${a} = ${b / a}`;
	console.log(" Sum:", sum);
	console.log(" Product:", product);
	console.log(" Division:", division);

	// Test 5: Complex expressions
	console.log("\nTest 5: Complex expressions");
	let x = 5;
	let y = 3;
	let complex1 = `(${x} + ${y}) * 2 = ${(x + y) * 2}`;
	let complex2 = `Average of ${x} and ${y} is ${(x + y) / 2}`;
	console.log(" Complex 1:", complex1);
	console.log(" Complex 2:", complex2);

	// Test 6: Boolean interpolation
	console.log("\nTest 6: Boolean interpolation");
	let isActive = true;
	let isDisabled = false;
	let status1 = `Active: ${isActive}`;
	let status2 = `Disabled: ${isDisabled}`;
	console.log(" Status 1:", status1);
	console.log(" Status 2:", status2);

	// Test 7: Mixed types
	console.log("\nTest 7: Mixed types");
	let count = 42;
	let label = "items";
	let enabled = true;
	let mixed = `Status: ${enabled}, Count: ${count} ${label}`;
	console.log(" Result:", mixed);

	// Test 8: Empty template
	console.log("\nTest 8: Empty template");
	let empty = ``;
	console.log(" Result: '" + empty + "'");
	console.log(" Length:", empty.length);

	// Test 9: Template with only interpolation
	console.log("\nTest 9: Template with only interpolation");
	let value = 123;
	let onlyInterp = `${value}`;
	console.log(" Value:", value);
	console.log(" Result:", onlyInterp);
	console.log(" Type:", typeof onlyInterp);

	// Test 10: Consecutive interpolations
	console.log("\nTest 10: Consecutive interpolations");
	let n1 = 1;
	let n2 = 2;
	let n3 = 3;
	let consecutive = `${n1}${n2}${n3}`;
	console.log(" Result:", consecutive);

	// Test 11: String concatenation in interpolation
	console.log("\nTest 11: String concatenation in interpolation");
	let part1 = "Hello";
	let part2 = "World";
	let concatenated = `${part1 + " " + part2}`;
	console.log(" Part 1:", part1);
	console.log(" Part 2:", part2);
	console.log(" Result:", concatenated);

	// Test 12: Nested arithmetic
	console.log("\nTest 12: Nested arithmetic");
	let p = 3;
	let q = 4;
	let r = 5;
	let nested = `${p} * ${q} + ${r} = ${p * q + r}`;
	console.log(" Result:", nested);

	// Test 13: Comparison in template
	console.log("\nTest 13: Comparison in template");
	let age = 20;
	let canVote = `Age ${age}: Can vote = ${age >= 18}`;
	console.log(" Result:", canVote);

	// Test 14: Object property access
	console.log("\nTest 14: Object property access");
	let person = { name: "Bob", age: 25 };
	let personInfo = `${person.name} is ${person.age} years old`;
	console.log(" Result:", personInfo);

	// Test 15: Array indexing
	console.log("\nTest 15: Array indexing");
	let colors = ["red", "green", "blue"];
	let colorMsg = `First color: ${colors[0]}, Last: ${colors[2]}`;
	console.log(" Result:", colorMsg);

	// Test 16: Multiline template
	console.log("\nTest 16: Multiline template");
	let multiline = `Line 1
	Line 2
	Line 3`;
	console.log(" Result:", multiline);
	console.log(" Length:", multiline.length);

	// Test 17: Escape sequences
	console.log("\nTest 17: Escape sequences");
	let escaped = `Hello\nWorld\tTab`;
	console.log(" With escapes:", escaped);
	let withBackslash = `Path: C:\\Users\\Data`;
	console.log(" With backslash:", withBackslash);

	// Test 18: Template in function
	console.log("\nTest 18: Template in function");
	function greet(name, time) {
	return `Good ${time}, ${name}!`;
	}
	let morning = greet("Alice", "morning");
	let evening = greet("Bob", "evening");
	console.log(" Morning:", morning);
	console.log(" Evening:", evening);

	// Test 19: Template with function call
	console.log("\nTest 19: Template with function call");
	function double(n) {
	return n * 2;
	}
	let funcResult = `Double of 5 is ${double(5)}`;
	console.log(" Result:", funcResult);

	// Test 20: Combining with string methods
	console.log("\nTest 20: Combining with string methods");
	let word = "javascript";
	let upperFirst = word[0];
	let rest = word.slice(1);
	let capitalized = `${upperFirst}${rest}`;
	console.log(" Original:", word);
	console.log(" Capitalized:", capitalized);
	console.log(" Includes 'script':", capitalized.includes("script"));

	// Test 21: Price formatting example
	console.log("\nTest 21: Price formatting example");
	let price = 19.99;
	let quantity = 3;
	let tax = 0.08;
	let subtotal = price * quantity;
	let total = subtotal * (1 + tax);
	let receipt = `
	Item price: $${price}
	Quantity: ${quantity}
	Subtotal: $${subtotal}
	Tax (${tax * 100}%): $${subtotal * tax}
	Total: $${total}`;
	console.log(receipt);

	// Test 22: URL building
	console.log("\nTest 22: URL building");
	let protocol = "https";
	let domain = "example.com";
	let path = "api/users";
	let id = 123;
	let url = `${protocol}://${domain}/${path}/${id}`;
	console.log(" URL:", url);

	// Test 23: Error message formatting
	console.log("\nTest 23: Error message formatting");
	let errorCode = 404;
	let resource = "user";
	let errorMsg = `Error ${errorCode}: ${resource} not found`;
	console.log(" Error:", errorMsg);

	// Test 24: Conditional expression in template
	console.log("\nTest 24: Conditional expression in template");
	let score = 85;
	let grade = `Score: ${score} - ${score >= 90 ? "A" : score >= 80 ? "B" : "C"}`;
	console.log(" Result:", grade);

	// Test 25: Complex data formatting
	console.log("\nTest 25: Complex data formatting");
	let user = {
	id: 1001,
	name: "Charlie",
	email: "charlie@example.com",
	active: true
	};
	let userCard = `
	┌─────────────────────────
	│ ID: ${user.id}
	│ Name: ${user.name}
	│ Email: ${user.email}
	│ Status: ${user.active ? "Active" : "Inactive"}
	└─────────────────────────`;
	console.log(userCard);

	// Test 26: Edge case - very long interpolation
	console.log("\nTest 26: Edge case - very long interpolation");
	let longExpr = `Result: ${1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10}`;
	console.log(" Result:", longExpr);

	// Test 27: Template with null and undefined
	console.log("\nTest 27: Template with null and undefined");
	let nullVal = null;
	let undefVal = undefined;
	let nullMsg = `Null value: ${nullVal}`;
	let undefMsg = `Undefined value: ${undefVal}`;
	console.log(" Null:", nullMsg);
	console.log(" Undefined:", undefMsg);

	// Test 28: String with template-like syntax
	console.log("\nTest 28: String with template-like syntax");
	let innerCalc = 5 + 5;
	let template = `Template with inner calculation: ${innerCalc}`;
	console.log(" Result:", template);

	// Test 29: Large numbers
	console.log("\nTest 29: Large numbers");
	let big = 1000000;
	let formatted = `One million = ${big}`;
	console.log(" Result:", formatted);

	// Test 30: Performance test - multiple templates
	console.log("\nTest 30: Performance test");
	for (let i = 0; i < 5; i++) {
	let msg = `Iteration ${i}: ${i * 2}`;
	console.log(" " + msg);
	}

	console.log("\n=== All template literal tests completed ===");

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