Diffusion Ant (ast) Code

ant/tests/string_indexing.cjs
32b18f1b1662ast

string_indexing.cjs
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			// Test string indexing feature

			console.log("=== String Indexing Test ===\n");

			// Test 1: Basic string indexing
			console.log("Test 1: Basic indexing");
			let str = "hello";
			console.log(" str = 'hello'");
			console.log(" str[0]:", str[0]);
			console.log(" str[1]:", str[1]);
			console.log(" str[2]:", str[2]);
			console.log(" str[3]:", str[3]);
			console.log(" str[4]:", str[4]);

			// Test 2: Last character access
			console.log("\nTest 2: Last character");
			let path = "hello/world";
			console.log(" path = 'hello/world'");
			console.log(" path.length:", path.length);
			let lastIdx = path.length - 1;
			console.log(" path[path.length - 1]:", path[lastIdx]);

			// Test 3: Direct expression in brackets
			console.log("\nTest 3: Expression in brackets");
			console.log(" path[path.length - 1]:", path[path.length - 1]);
			console.log(" path[5]:", path[5]);
			console.log(" path[0]:", path[0]);

			// Test 4: Out of bounds access
			console.log("\nTest 4: Out of bounds");
			console.log(" str[100] (should be undefined):", str[100]);
			console.log(" str[-1] (should be undefined):", str[-1]);

			// Test 5: Looping through string characters
			console.log("\nTest 5: Loop through string");
			let word = "test";
			console.log(" word = 'test'");
			for (let i = 0; i < word.length; i = i + 1) {
			console.log(" word[" + i + "]:", word[i]);
			}

			// Test 6: String comparison with indexing
			console.log("\nTest 6: Character comparison");
			let s1 = "abc";
			let s2 = "xyz";
			console.log(" s1 = 'abc', s2 = 'xyz'");
			console.log(" s1[0] == s2[0]:", s1[0] == s2[0]);
			console.log(" s1[0] != s2[0]:", s1[0] != s2[0]);

			// Test 7: Building strings from characters
			console.log("\nTest 7: String building");
			let original = "hello";
			let reversed = "";
			for (let i = original.length - 1; i >= 0; i = i - 1) {
			reversed = reversed + original[i];
			}
			console.log(" original:", original);
			console.log(" reversed:", reversed);

			// Test 8: First and last character check
			console.log("\nTest 8: First and last character");
			let url = "/api/users/";
			console.log(" url = '/api/users/'");
			console.log(" First char (url[0]):", url[0]);
			console.log(" Last char (url[url.length - 1]):", url[url.length - 1]);
			console.log(" Starts with '/':", url[0] === "/");
			console.log(" Ends with '/':", url[url.length - 1] === "/");

			// Test 9: Middle character access
			console.log("\nTest 9: Middle character");
			let text = "abcdefgh";
			let mid = text.length / 2;
			console.log(" text = 'abcdefgh'");
			console.log(" Middle index:", mid);
			console.log(" text[mid]:", text[mid]);

			// Test 10: Empty string
			console.log("\nTest 10: Empty string");
			let empty = "";
			console.log(" empty.length:", empty.length);
			console.log(" empty[0] (should be undefined):", empty[0]);

			// Test 11: Single character string
			console.log("\nTest 11: Single character");
			let single = "x";
			console.log(" single = 'x'");
			console.log(" single[0]:", single[0]);
			console.log(" single[1] (should be undefined):", single[1]);

			// Test 12: Path manipulation example
			console.log("\nTest 12: Path manipulation");
			let filePath = "/home/user/file.txt";
			console.log(" filePath = '/home/user/file.txt'");
			let hasTrailingSlash = filePath[filePath.length - 1] === "/";
			console.log(" Has trailing slash:", hasTrailingSlash);
			let hasLeadingSlash = filePath[0] === "/";
			console.log(" Has leading slash:", hasLeadingSlash);

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

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