Start implementing logic for auto update, but push to backlog for now

Author: Freymaurer

build/TestTasks.fs

@@ -11,6 +11,28 @@ let FableTestPath_input = "tests/FsSpreadsheet.Tests"
 
 module RunTests = 
 
+    open Fake.Core
+
+    //let createFreshTestFiles = BuildTask.create "createFreshTestFiles" [] {
+    //    let testFilesPath = "./tests/TestUtils/TestFiles"
+    //    let source = System.IO.FileInfo(testFilesPath + @"/TestWorkbook_Excel.xlsx")
+    //    let scriptsFolder = "/Scripts"
+    //    let testFiles = 
+    //        [|
+    //            @"/TestWorkbook_FsSpreadsheet.net.xlsx",    @".\runFsSpreadsheet.fsx.cmd"
+    //            @"/TestWorkbook_FsSpreadsheet.js.xlsx",     @".\runFsSpreadsheet.js.cmd"
+    //            @"/TestWorkbook_FableExceljs.xlsx",         @".\runFableExceljs"
+    //            @"/TestWorkbook_ClosedXML.xlsx",            @".\runClosedXml"
+    //        |]
+
+    //    for testFile, script in testFiles do
+    //        let target = System.IO.FileInfo(testFilesPath + testFile)
+    //        if source.LastWriteTimeUtc > target.LastWriteTimeUtc then
+    //            let scriptFolderPath = testFilesPath + scriptsFolder
+    //            Trace.traceImportant $"Update `{testFile}` with `{script}`, as source file was updated since last transpilation."
+    //            run (createProcess script) "" scriptFolderPath
+    //}
+
     /// runs `npm test` in root. 
     /// npm test consists of `test` and `pretest`
     /// check package.json in root for behavior