Added cleanup steps to integration test #345

Author: holgerbrandl

src/test/kotlin/kscript/app/resolver/IntegrationTests.kt

@@ -1,11 +1,58 @@
 package kscript.app.resolver
 
+import org.junit.jupiter.api.Assertions
 import org.junit.jupiter.api.Test
+import java.io.ByteArrayOutputStream
+import java.io.File
+import java.io.PrintStream
 
 class IntegrationTests {
 
     @Test
     fun `it should run kscript and resolve dependencies`(){
-        kscript.app.main(arrayOf("log4j_dep.kts"))
+        // clear .m2 cache
+        val log4jCached = File(System.getProperty("user.home"), ".m2/repository/log4j/log4j/1.2.14/")
+        if(log4jCached.isDirectory) {
+            System.err.println("Cleaning up cached .m2 copy of log4j")
+            log4jCached.deleteRecursively()
+        }
+
+        //clear kscript cache
+        kscript.app.main(arrayOf("--clear-cache"))
+
+        // run as when being on commandline
+//        val observed = captureOutput {
+            kscript.app.main(arrayOf("test/resources/depends_on_annot.kts"))
+//        }.stdout.replace(System.getProperty("user.home")!!, "")
+
+//        Assertions.assertEquals("kotlin  -classpath /.m2/repository/log4j/log4j/1.2.14/log4j-1.2.14.jar:/.m2/repository/com/offbytwo/docopt/0.6.0.20150202/docopt-0.6.0.20150202.jar:/.kscript/cache/jar_7cb43f5abd032b31680d6649e4ef6a87/scriplet.jar:/.sdkman/candidates/kotlin/1.5.31/lib/kotlin-script-runtime.jar Main_Depends_on_annot", observed)
+        // todo complete the assertion to fix the test
     }
+}
+
+
+internal data class CapturedOutput(val stdout: String, val stderr: String)
+
+internal fun captureOutput(expr: () -> Any): CapturedOutput {
+    val origOut = System.out
+    val origErr = System.err
+    // https://stackoverflow.com/questions/216894/get-an-outputstream-into-a-string
+
+    val baosOut = ByteArrayOutputStream()
+    val baosErr = ByteArrayOutputStream()
+
+    System.setOut(PrintStream(baosOut));
+    System.setErr(PrintStream(baosErr));
+
+
+    // run the expression
+    expr()
+
+    val stdout = String(baosOut.toByteArray()).trim()
+    val stderr = String(baosErr.toByteArray()).trim()
+
+    System.setOut(origOut)
+    System.setErr(origErr)
+
+    return CapturedOutput(stdout, stderr)
 }