feat(ads/seo/release): v1.2.0 with live Google Ads, isolated ad profile, ads.txt, and SEO/AEO/GEO optimization

tests/Paca.Tests/Core/AdaptiveStreamingAndIntegrityGateTests.cs

@@ -0,0 +1,97 @@
+using System;
+using System.Security.Cryptography;
+using System.Text;
+using Paca.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+/// <summary>
+/// 적응형 청크 크기 조절, 체크섬 무결성, 발열 스로틀링, 트랜스코딩 프로파일 및 스트리밍 프록시 게이트 (Gate 131 ~ Gate 135)
+/// </summary>
+public class AdaptiveStreamingAndIntegrityGateTests
+{
+    [Fact]
+    public void Gate131_AdaptiveChunkSizingEngine_Audit()
+    {
+        var engine = new AdaptiveChunkSizingEngine();
+
+        // 60 Mbps (초고속망) -> 8MB 청크
+        Assert.Equal(8 * 1024 * 1024, engine.CalculateOptimalChunkSize(measuredSpeedKbps: 60 * 1024));
+
+        // 20 Mbps (표준망) -> 4MB 청크
+        Assert.Equal(4 * 1024 * 1024, engine.CalculateOptimalChunkSize(measuredSpeedKbps: 20 * 1024));
+
+        // 5 Mbps (저속망) -> 1MB 청크
+        Assert.Equal(1 * 1024 * 1024, engine.CalculateOptimalChunkSize(measuredSpeedKbps: 5 * 1024));
+
+        // 500 Kbps (극저속망) -> 512KB 청크
+        Assert.Equal(512 * 1024, engine.CalculateOptimalChunkSize(measuredSpeedKbps: 500));
+    }
+
+    [Fact]
+    public void Gate132_MediaChecksumValidator_Sha256_Audit()
+    {
+        var validator = new MediaChecksumValidator();
+        var sampleBytes = Encoding.UTF8.GetBytes("Paca Secure Media Download Engine 2026");
+
+        // 기대되는 SHA-256 해시 계산
+        using var sha = SHA256.Create();
+        var expectedHash = Convert.ToHexString(sha.ComputeHash(sampleBytes)).ToLowerInvariant();
+
+        Assert.True(validator.VerifySha256(sampleBytes, expectedHash));
+        Assert.False(validator.VerifySha256(sampleBytes, "invalid_hash_string"));
+    }
+
+    [Fact]
+    public void Gate133_ThermalThrottlingGuard_Audit()
+    {
+        var guard = new ThermalThrottlingGuard();
+        Assert.Equal(42.0, guard.OverheatThresholdCelsius);
+        Assert.Equal(38.0, guard.NormalRecoveryThresholdCelsius);
+
+        // 35°C 정상 -> 스로틀링 비활성, 6세그먼트
+        Assert.False(guard.IsThrottled(currentTemperatureCelsius: 35.0));
+        Assert.Equal(6, guard.GetAdjustedSegments(requestedSegments: 6, currentTemperatureCelsius: 35.0));
+
+        // 43°C 과열 -> 스로틀링 활성, 1세그먼트로 강제 감속
+        Assert.True(guard.IsThrottled(currentTemperatureCelsius: 43.0));
+        Assert.Equal(1, guard.GetAdjustedSegments(requestedSegments: 6, currentTemperatureCelsius: 43.0));
+    }
+
+    [Fact]
+    public void Gate134_TranscodeProfileManager_Profiles_Audit()
+    {
+        var manager = new TranscodeProfileManager();
+
+        var mp4Args = manager.GetFfmpegProfileArgs("mp4_universal");
+        Assert.Contains("-c:v libx264", mp4Args);
+        Assert.Contains("-c:a aac", mp4Args);
+
+        var webmArgs = manager.GetFfmpegProfileArgs("webm_modern");
+        Assert.Contains("-c:v libvpx-vp9", webmArgs);
+        Assert.Contains("-c:a libopus", webmArgs);
+
+        var mp3Args = manager.GetFfmpegProfileArgs("audio_mp3_hq");
+        Assert.Contains("-vn", mp3Args);
+        Assert.Contains("-b:a 320k", mp3Args);
+    }
+
+    [Fact]
+    public void Gate135_RemoteStreamProxyBuffer_RingBuffer_Audit()
+    {
+        var buffer = new RemoteStreamProxyBuffer(capacityBytes: 1024);
+        Assert.Equal(0, buffer.BufferedBytes);
+
+        var chunk1 = new byte[256];
+        Array.Fill(chunk1, (byte)0xAA);
+        buffer.Write(chunk1);
+        Assert.Equal(256, buffer.BufferedBytes);
+
+        var readTarget = new byte[128];
+        var readCount = buffer.Read(readTarget, 0, 128);
+        Assert.Equal(128, readCount);
+        Assert.Equal(128, buffer.BufferedBytes);
+        Assert.Equal(0xAA, readTarget[0]);
+    }
+}