c

Tests/LiveKitTests/Extensions/StringTests.swift

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+/*
+ * Copyright 2025 LiveKit
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import XCTest
+@testable import LiveKit
+
+final class StringTests: XCTestCase {
+
+    func testByteLength() {
+        // ASCII characters (1 byte each)
+        XCTAssertEqual("hello".byteLength, 5)
+        XCTAssertEqual("".byteLength, 0)
+
+        // Unicode characters (variable bytes)
+        XCTAssertEqual("👋".byteLength, 4) // Emoji (4 bytes)
+        XCTAssertEqual("ñ".byteLength, 2)  // Spanish n with tilde (2 bytes)
+        XCTAssertEqual("你好".byteLength, 6) // Chinese characters (3 bytes each)
+    }
+
+    func testTruncate() {
+        // Test ASCII strings
+        XCTAssertEqual("hello".truncate(maxBytes: 5), "hello")
+        XCTAssertEqual("hello".truncate(maxBytes: 3), "hel")
+        XCTAssertEqual("".truncate(maxBytes: 5), "")
+
+        // Test Unicode strings
+        XCTAssertEqual("👋hello".truncate(maxBytes: 4), "👋") // Emoji is 4 bytes
+        XCTAssertEqual("hi👋".truncate(maxBytes: 5), "hi") // Won't cut in middle of emoji
+        XCTAssertEqual("你好world".truncate(maxBytes: 6), "你好") // Chinese characters are 3 bytes each
+
+        // Test edge cases
+        XCTAssertEqual("hello".truncate(maxBytes: 0), "")
+        XCTAssertEqual("hello".truncate(maxBytes: 100), "hello")
+    }
+}