From b1c86069186224f1ed7340be94ae42f58aec1433 Mon Sep 17 00:00:00 2001
From: sharkdp <davidpeter@web.de>
Date: Fri, 30 Oct 2020 19:32:45 +0100
Subject: [PATCH] Print warning on empty content

closes #107
closes #108
---
 src/lib.rs                 |  3 +++
 tests/examples/empty       |  0
 tests/integration_tests.rs | 29 +++++++++++++++++++++++++++++
 3 files changed, 32 insertions(+)
 create mode 100644 tests/examples/empty

diff --git a/src/lib.rs b/src/lib.rs
index 2bdbdc3..b81f35a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -428,8 +428,10 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
 
         // Finish last line
         self.print_textline().ok();
+
         if !self.header_was_printed() {
             self.header();
+            writeln!(self.writer, "│        │ No content to print     │                         │        │        │").ok();
         }
         self.footer();
 
@@ -459,6 +461,7 @@ mod tests {
         let input = io::empty();
         let expected_string = "\
 ┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐
+│        │ No content to print     │                         │        │        │
 └────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘
 "
         .to_owned();
diff --git a/tests/examples/empty b/tests/examples/empty
new file mode 100644
index 0000000..e69de29
diff --git a/tests/integration_tests.rs b/tests/integration_tests.rs
index e8b9462..b7d642e 100644
--- a/tests/integration_tests.rs
+++ b/tests/integration_tests.rs
@@ -41,6 +41,35 @@ fn length_restricts_output_size() {
         );
 }
 
+#[test]
+fn prints_warning_on_empty_content() {
+    hexyl()
+        .arg("empty")
+        .arg("--color=never")
+        .assert()
+        .success()
+        .stdout(
+            "┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐\n\
+             │        │ No content to print     │                         │        │        │\n\
+             └────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘\n",
+        );
+}
+
+#[test]
+fn prints_warning_when_skipping_past_the_end() {
+    hexyl()
+        .arg("ascii")
+        .arg("--color=never")
+        .arg("--skip=1000")
+        .assert()
+        .success()
+        .stdout(
+            "┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐\n\
+             │        │ No content to print     │                         │        │        │\n\
+             └────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘\n",
+        );
+}
+
 #[test]
 fn fail_if_length_and_bytes_options_are_used_simultaneously() {
     hexyl()