Add support for default extension specification, trailing dot escaping

For example:

cxx{*}: extension = cxx

cxx{foo}         # foo.cxx
cxx{foo.test}    # foo.test      (probably what we want...)
cxx{foo.test...} # foo.test.cxx  (... is this)
cxx{foo..}       # foo.
cxx{foo....}     # foo..
cxx{foo.....}    # error (must come in escape pair)

1 files changed, 71 insertions, 0 deletions

diff --git a/tests/name/extension.test b/tests/name/extension.test
new file mode 100644
index 0000000..c7d7066
--- /dev/null
+++ b/tests/name/extension.test
@@ -0,0 +1,71 @@
+# file      : tests/name/extension.test
+# copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
+# license   : MIT; see accompanying LICENSE file
+
+.include ../common.test
+
++cat <<EOI >=build/root.build
+define txt: file
+txt{*}: extension = txt
+EOI
+
+: name
+:
+{
+  test.arguments = --match-only update
+
+  : unspecified
+  :
+  touch foo.txt;
+  $* <'./: txt{foo}'
+
+  : specified
+  :
+  touch foo.text;
+  $* <'./: txt{foo.text}'
+
+  : specified-none
+  :
+  touch foo;
+  $* <'./: txt{foo.}'
+
+  : specified-default
+  :
+  touch foo.test.txt;
+  $* <'./: txt{foo.test...}'
+
+  : specified-escape-one
+  :
+  touch foo.;
+  $* <'./: txt{foo..}'
+
+  : specified-escape-two
+  :
+  touch foo..;
+  $* <'./: txt{foo....}'
+
+  : specified-invalid
+  :
+  $* <'./: txt{foo.....}' 2>>EOE != 0
+  <stdin>:1:5: error: invalid trailing dot sequence in target name 'foo.....'
+  EOE
+}
+
+: pattern
+:
+{
+  : specified-none
+  :
+  touch foo;
+  $* <'print txt{fo?.}' >'txt{foo.}'
+
+  : specified-default
+  :
+  touch foo.test.txt;
+  $* <'print txt{fo?.test...}' >'txt{foo.test...}'
+
+  : specified-escape
+  :
+  touch foo.;
+  $* <'print txt{fo?..}' >'txt{foo..}'
+}