content: add utf8 char at url left boundary test

damusTests/ContentParserTests.swift

@@ -0,0 +1,27 @@
+//
+//  ContentParserTests.swift
+//  damusTests
+//
+//  Created by William Casarin on 2023-07-16.
+//
+
+import XCTest
+
+final class ContentParserTests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testPerformanceExample() throws {
+        // This is an example of a performance test case.
+        self.measure {
+            // Put the code you want to measure the time of here.
+        }
+    }
+
+}