Added three new snapshot tests for --tabs and --wrap.

tests/tester.rs

@@ -38,13 +38,14 @@ impl BatTester {
         BatTester { temp_dir, exe }
     }
 
-    pub fn test_snapshot(&self, name: &str, style: &str, tab_width: u32) {
+    pub fn test_snapshot(&self, name: &str, style: &str, tab_width: u32, wrap: bool) {
         let output = Command::new(&self.exe)
             .current_dir(self.temp_dir.path())
             .args(&[
                 "sample.rs",
                 "--decorations=always",
                 "--terminal-width=80",
+                &format!("--wrap={}", if wrap { "character" } else { "never" }),
                 &format!("--tabs={}", tab_width),
                 &format!("--style={}", style),
             ]).output()