Implement all emoji text message boosting

UnitTests/Sources/EmojiDetectionTests.swift

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+//
+// Copyright 2023 New Vector Ltd
+//
+// 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 ElementX
+
+class EmojiDetectionTests: XCTestCase {
+    func testEmojiDetection() {
+        XCTAssertTrue("👨‍👩‍👦".containsOnlyEmoji)
+        XCTAssertTrue("1️⃣".containsOnlyEmoji)
+        XCTAssertTrue("🚀".containsOnlyEmoji)
+        XCTAssertTrue("👳🏾‍♂️".containsOnlyEmoji)
+        XCTAssertTrue("🪩".containsOnlyEmoji)
+        
+        XCTAssertTrue("👨‍👩‍👦1️⃣🚀👳🏾‍♂️🪩".containsOnlyEmoji)
+        
+        XCTAssertFalse(" 👨‍👩‍👦".containsOnlyEmoji)
+        XCTAssertFalse(" 👨‍👩‍👦 ".containsOnlyEmoji)
+        XCTAssertFalse("👨‍👩‍👦 ".containsOnlyEmoji)
+        XCTAssertFalse("Ciao 👨‍👩‍👦 peeps".containsOnlyEmoji)
+        
+        XCTAssertFalse("0".containsOnlyEmoji)
+        XCTAssertFalse("1".containsOnlyEmoji)
+        XCTAssertFalse("5".containsOnlyEmoji)
+        XCTAssertFalse("000".containsOnlyEmoji)
+        
+        XCTAssertTrue("👍".containsOnlyEmoji)
+        XCTAssertTrue("🫱🏼‍🫲🏾".containsOnlyEmoji)
+        XCTAssertTrue("👁❤️🍝".containsOnlyEmoji)
+        XCTAssertFalse("🙂 ".containsOnlyEmoji)
+        XCTAssertFalse("Hello 👋".containsOnlyEmoji)
+        XCTAssertFalse("Thanks".containsOnlyEmoji)
+    }
+}