(#22) Run configuration: empty working dir should behave as default

Author: ForNeVeR

src/main/kotlin/com/intellij/plugin/powershell/ide/run/PowerShellScriptCommandLineState.kt

@@ -22,6 +22,7 @@ import com.intellij.openapi.vfs.LocalFileSystem
 import com.intellij.plugin.powershell.lang.lsp.LSPInitMain
 import com.intellij.plugin.powershell.lang.lsp.languagehost.PowerShellNotInstalled
 import com.intellij.terminal.TerminalExecutionConsole
+import com.intellij.util.text.nullize
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import org.jetbrains.annotations.TestOnly
@@ -45,7 +46,7 @@ class PowerShellScriptCommandLineState(
         ProjectRootManager.getInstance(project).fileIndex.getModuleForFile(it)
       }
     }
-    workingDirectory = runConfiguration.customWorkingDirectory?.let {
+    workingDirectory = runConfiguration.customWorkingDirectory.nullize(nullizeSpaces = true)?.let {
       toPath(ProgramParametersUtil.expandPathAndMacros(it, module, project))
     } ?: getDefaultWorkingDirectory(toPath(runConfiguration.scriptPath))
   }

src/test/kotlin/com/intellij/plugin/powershell/ide/run/PowerShellRunConfigurationTests.kt

@@ -23,7 +23,11 @@ class PowerShellRunConfigurationTests : BasePlatformTestCase() {
   }
 
   fun testNoCustomWorkingDirectory() {
-    assertWorkingDirectory(custom = null, expected = projectPath.resolve("scripts"))
+    assertWorkingDirectory(custom = null, expected = defaultWorkingDirectory)
+  }
+
+  fun testEmptyCustomWorkingDirectory() {
+    assertWorkingDirectory(custom = "", expected = defaultWorkingDirectory)
   }
 
   fun testCustomWorkingDirectoryPathVariable() {