From 7c07e1d9de388048936dc0446b185eaa35b6d1a5 Mon Sep 17 00:00:00 2001
From: Jaroslav Tulach <jaroslav.tulach@apidesign.org>
Date: Sun, 11 Oct 2015 14:40:19 +0200
Subject: [PATCH] Invoking tests$ mvn teavm:compile teavm:testCompile
 teavm:test should fail with reasonable error and not NPE

---
 .../src/main/java/org/teavm/maven/BuildJavascriptTestMojo.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/maven/plugin/src/main/java/org/teavm/maven/BuildJavascriptTestMojo.java b/tools/maven/plugin/src/main/java/org/teavm/maven/BuildJavascriptTestMojo.java
index 7b8618570..7d41f0ba8 100644
--- a/tools/maven/plugin/src/main/java/org/teavm/maven/BuildJavascriptTestMojo.java
+++ b/tools/maven/plugin/src/main/java/org/teavm/maven/BuildJavascriptTestMojo.java
@@ -93,6 +93,9 @@ public class BuildJavascriptTestMojo extends AbstractJavascriptMojo {
 
         setupTool(tool);
         try {
+            if (!testFiles.isDirectory()) {
+                throw new MojoFailureException("Directory with tests doesn't exist: " + testFiles);
+            }
             getLog().info("Searching for tests in the directory `" + testFiles.getAbsolutePath() + "'");
             tool.setAdapter(createAdapter(classLoader));
             findTestClasses(classLoader, testFiles, "");