Fix error messages, #134

Author: gnodet

jansi/src/main/java/org/fusesource/jansi/WindowsAnsiOutputStream.java

@@ -39,7 +39,6 @@
 import java.io.IOException;
 import java.io.OutputStream; // expected diff with WindowsAnsiPrintStream.java
 
-import org.fusesource.jansi.internal.WindowsSupport;
 import org.fusesource.jansi.internal.Kernel32.CONSOLE_SCREEN_BUFFER_INFO;
 import org.fusesource.jansi.internal.Kernel32.COORD;
 

jansi/src/main/java/org/fusesource/jansi/WindowsAnsiPrintStream.java

@@ -39,7 +39,6 @@
 import java.io.IOException;
 import java.io.PrintStream; // expected diff with WindowsAnsiOutputStream.java
 
-import org.fusesource.jansi.internal.WindowsSupport;
 import org.fusesource.jansi.internal.Kernel32.CONSOLE_SCREEN_BUFFER_INFO;
 import org.fusesource.jansi.internal.Kernel32.COORD;
 

jansi/src/main/java/org/fusesource/jansi/WindowsSupport.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2009-2019 the original author(s).
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.fusesource.jansi;
+
+import java.io.UnsupportedEncodingException;
+
+import static org.fusesource.jansi.internal.Kernel32.FORMAT_MESSAGE_FROM_SYSTEM;
+import static org.fusesource.jansi.internal.Kernel32.FormatMessageW;
+import static org.fusesource.jansi.internal.Kernel32.GetLastError;
+
+public class WindowsSupport {
+
+    public static String getLastErrorMessage() {
+        int errorCode = GetLastError();
+        return getErrorMessage(errorCode);
+    }
+
+    public static String getErrorMessage(int errorCode) {
+        int bufferSize = 160;
+        byte data[] = new byte[bufferSize];
+        FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM, 0, errorCode, 0, data, bufferSize, null);
+        try {
+            return new String(data, "UTF-16LE").trim();
+        } catch (UnsupportedEncodingException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+}

jansi/src/test/java/org/fusesource/jansi/WindowsSupportTest.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2009-2019 the original author(s).
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.fusesource.jansi;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assume.assumeTrue;
+
+public class WindowsSupportTest {
+
+    @Test
+    public void testErrorMessage() {
+        assumeTrue(AnsiConsole.IS_WINDOWS);
+        String msg = WindowsSupport.getErrorMessage(500);
+        assertEquals(msg, "User profile cannot be loaded.");
+    }
+}