Re: [PATCH v3 35/35] userdiff tests: add basic test for ruby

Add a test for the Ruby pattern added way back in ad8c1d9260 (diff:
add ruby funcname pattern, 2008-07-31).

The "One/Two" picking demonstrates existing behavior, and a general
case where we may not do what the user expects since we're not aware
of the indentation level.

The code is modified from the Ruby code we have in-tree at
Documentation/asciidoctor-extensions.rb.

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 t/t4018-diff-funcname.sh |  1 -
 t/t4018/ruby.sh          | 58 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100755 t/t4018/ruby.sh

diff --git a/t/t4018-diff-funcname.sh b/t/t4018-diff-funcname.sh
index b0c2782d067..7793d7652d5 100755
--- a/t/t4018-diff-funcname.sh
+++ b/t/t4018-diff-funcname.sh

@@ -23,7 +23,6 @@ test_expect_success 'setup' '
 	html
 	objc
 	pascal
-	ruby
 	tex
 	EOF
 

diff --git a/t/t4018/ruby.sh b/t/t4018/ruby.sh
new file mode 100755
index 00000000000..ef8a154421a
--- /dev/null
+++ b/t/t4018/ruby.sh

@@ -0,0 +1,58 @@
+#!/bin/sh
+#
+# See ../t4018-diff-funcname.sh's test_diff_funcname()
+#
+
+test_diff_funcname 'ruby: "def" over "class/module"' \
+	8<<\EOF_HUNK 9<<\EOF_TEST
+def process(parent)
+EOF_HUNK
+require 'asciidoctor'
+
+module Git
+  module Documentation
+    class SomeClass
+      use_some
+
+      def process(parent)
+        puts("hello")
+	puts(ChangeMe)
+      end
+    end
+  end
+end
+EOF_TEST
+
+test_diff_funcname 'ruby: "class" over "class/module"' \
+	8<<\EOF_HUNK 9<<\EOF_TEST
+class Two
+EOF_HUNK
+module Git
+  module Documentation
+    class One
+    end
+
+    class Two
+      # Spacing for -U1

+      ChangeMe
+    end
+  end
+end
+EOF_TEST
+
+test_diff_funcname 'ruby: picks first "class/module/def" before changed context' \
+	'-U1' \
+	8<<\EOF_HUNK 9<<\EOF_TEST
+class One
+EOF_HUNK
+module Git
+  module Documentation
+    class One
+    end
+
+    class Two
+      ChangeMe
+    end
+  end
+end
+EOF_TEST