fixing subtitle extractor

VideoNodes/Tests/_TestBase.cs

@@ -0,0 +1,63 @@
+#if(DEBUG)
+
+using FileFlows.VideoNodes;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Text.Json;
+
+namespace VideoNodes.Tests;
+
+[TestClass]
+public abstract class TestBase
+{
+    public string TestPath { get; private set; }
+    public string TempPath { get; private set; }
+    public string FfmpegPath { get; private set; }
+
+    [TestInitialize]
+    public void TestInitialize()
+    {
+        if (File.Exists("../../../test.settings.dev.json"))
+        {
+            LoadSettings("../../../test.settings.dev.json");
+        }
+        else if (File.Exists("../../../test.settings.json"))
+        {
+            LoadSettings("../../../test.settings.json");
+        }
+        this.TestPath = this.TestPath?.EmptyAsNull() ?? @"C:\videos\testfiles";
+        this.TempPath = this.TestPath?.EmptyAsNull() ?? @"C:\videos\temp";
+        this.FfmpegPath = this.FfmpegPath?.EmptyAsNull() ?? @"C:\utils\ffmpeg\ffmpeg.exe";
+        if (Directory.Exists(this.TempPath) == false)
+            Directory.CreateDirectory(this.TempPath);
+    }
+
+    private void LoadSettings(string filename)
+    {
+        try
+        {
+            string json = File.ReadAllText(filename);
+            var settings = JsonSerializer.Deserialize<TestSettings>(json);
+            this.TestPath = settings.TestPath;
+            this.TempPath = settings.TempPath;
+            this.FfmpegPath = settings.FfmpegPath;
+        }
+        catch (Exception) { }
+    }
+
+    protected virtual void TestStarting()
+    {
+
+    }
+
+    protected string TestFile_BasicMkv => Path.Combine(TestPath, "basic.mkv");
+    protected string TestFile_Pgs => Path.Combine(TestPath, "pgs.mkv");
+
+    private class TestSettings
+    {
+        public string TestPath { get; set; }
+        public string TempPath { get; set; }
+        public string FfmpegPath { get; set; }
+    }
+}
+
+#endif