From 1b988f37fe96248ca412fc3159922636106e04f4 Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Sun, 9 Feb 2020 18:29:57 +0200
Subject: Change: ignore empty lines in scenarios

---
 src/parser.rs | 10 +++++++++-
 subplot.md    | 45 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/src/parser.rs b/src/parser.rs
index 39faab2..35cb488 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -4,7 +4,7 @@
 /// Each logical line forms a scenario step. It may be divided into
 /// multiple physical lines.
 pub fn parse_scenario_snippet(snippet: &str) -> impl Iterator<Item = &str> {
-    snippet.lines()
+    snippet.lines().filter(|line| !line.trim().is_empty())
 }
 
 #[cfg(test)]
@@ -32,4 +32,12 @@ mod test {
             vec!["given I am Tomjon", "when I declare myself king"]
         )
     }
+
+    #[test]
+    fn parses_two_lines_with_empty_line() {
+        assert_eq!(
+            parse_lines("given I am Tomjon\n\nwhen I declare myself king"),
+            vec!["given I am Tomjon", "when I declare myself king"]
+        )
+    }
 }
diff --git a/subplot.md b/subplot.md
index ff05be7..7c72ea8 100644
--- a/subplot.md
+++ b/subplot.md
@@ -544,6 +544,51 @@ then program finished successfully
 ~~~
 
 
+Empty lines in scenarios
+-----------------------------------------------------------------------------
+
+This scenario verifies that empty lines in scenarios are ignored.
+
+~~~scenario
+given file emptylines.md
+given file b.yaml
+given file f.py
+when I run sp-docgen emptylines.md -o emptylines.pdf
+then file emptylines.pdf exists
+when I run sp-docgen emptylines.md -o emptylines.html
+then file emptylines.html exists
+when I run sp-codegen --run emptylines.md -o test.py
+then scenario "Simple" was run
+then step "given precondition foo" was run
+then step "when I do bar" was run
+then step "then bar was done" was run
+then program finished successfully
+~~~
+
+
+### A document with a scenario with empty lines (emptylines.md)
+
+~~~~{.file #emptylines.md .markdown .numberLines}
+---
+title: Test scenario
+bindings: b.yaml
+functions: f.py
+...
+
+# Simple
+This is the simplest possible test scenario
+
+```scenario
+given precondition foo
+
+when I do bar
+
+then bar was done
+
+```
+~~~~
+
+
 Document structure
 -----------------------------------------------------------------------------
 
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