issue #10 : add rm command

Author: fmbenhassine

src/main/java/io/github/benas/unixstream/UnixStream.java

@@ -472,4 +472,16 @@ static PrintWriter file(String filePath) throws IOException {
      */
     void to(final PrintWriter printWriter) throws IOException;
 
+    /*
+     * Miscellaneous methods
+     */
+
+    static void rm(final Path path) {
+        try {
+            Files.delete(path);
+        } catch (IOException e) {
+            throw new RuntimeException("Unable to delete file " + path.getFileName());
+        }
+    }
+
 }

src/test/java/io/github/benas/unixstream/components/RmTest.java

@@ -0,0 +1,32 @@
+package io.github.benas.unixstream.components;
+
+import io.github.benas.unixstream.UnixStream;
+import org.junit.After;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class RmTest {
+
+    private Path foo = Paths.get("target/foo.txt");
+
+    @Test
+    public void rm() throws IOException {
+        Files.createFile(foo);
+        assertThat(foo).exists();
+
+        UnixStream.rm(foo);
+
+        assertThat(foo).doesNotExist();
+    }
+
+    @After
+    public void tearDown() throws IOException {
+        Files.deleteIfExists(foo);
+    }
+}