Fix document command test in Windows.

Author: Aleksi Salmela

src/test/java/fi/helsinki/cs/tmc/cli/command/DocumentCommandTest.java

@@ -1,12 +1,21 @@
 package fi.helsinki.cs.tmc.cli.command;
 
+import static org.mockito.Mockito.when;
+import static org.powermock.api.mockito.PowerMockito.mockStatic;
+
 import fi.helsinki.cs.tmc.cli.Application;
 import fi.helsinki.cs.tmc.cli.CliContext;
+import fi.helsinki.cs.tmc.cli.io.EnvironmentUtil;
 import fi.helsinki.cs.tmc.cli.io.TestIo;
 
 import org.junit.Before;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
 
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(EnvironmentUtil.class)
 public class DocumentCommandTest {
 
     private Application app;
@@ -18,14 +27,28 @@ public void setUp() {
         io = new TestIo();
         ctx = new CliContext(io);
         app = new Application(ctx);
+
+        mockStatic(EnvironmentUtil.class);
+        when(EnvironmentUtil.getTerminalWidth()).thenReturn(100);
     }
 
     @Test
     public void run() throws InterruptedException {
+        when(EnvironmentUtil.isWindows()).thenReturn(false);
+        app = new Application(ctx);
+
+        String[] args = {"document", "-s", "0"};
+        app.run(args);
+        io.assertContains("Original dev team");
+    }
+
+    @Test
+    public void failOnWindows() throws InterruptedException {
+        when(EnvironmentUtil.isWindows()).thenReturn(true);
         app = new Application(ctx);
 
         String[] args = {"document", "-s", "0"};
         app.run(args);
-        io.assertContains("dev team");
+        io.assertContains("Command document doesn't exist");
     }
 }