More tests.

test/followSymlink.expected

@@ -0,0 +1,4 @@
+
+--- Signs ---
+Signs for symlink:
+    line=5  id=3000  name=GitGutterLineRemoved

test/helper.vim

@@ -2,8 +2,6 @@ set runtimepath+=../
 source ../plugin/gitgutter.vim
 
 function! Setup()
-  call system('git reset HEAD fixture.txt')
-  call system('git checkout fixture.txt')
   edit! fixture.txt
   sign unplace *
 endfunction

test/test

@@ -8,6 +8,9 @@ rm -f *.actual
 
 # Execute the tests.
 for testcase in test*.vim; do
+  git reset HEAD fixture.txt > /dev/null
+  git checkout fixture.txt
+
   vim -N -u NONE -S $testcase -c 'quit!'
 done
 
@@ -22,6 +25,7 @@ for expected in *.expected; do
   if diff $expected $actual; then
     count_ok=$((count_ok + 1))
     echo "$name ok"
+    rm $actual
   else
     count_fail=$((count_fail + 1))
     echo "$name failed"
@@ -31,7 +35,6 @@ done
 # Clean up.
 git reset HEAD fixture.txt > /dev/null
 git checkout fixture.txt
-# rm -f *.actual
 
 # Print results.
 echo

test/testFollowSymlink.vim

@@ -0,0 +1,10 @@
+source helper.vim
+
+let tmpfile = 'symlink'
+call system('ln -nfs fixture.txt '.tmpfile)
+execute 'edit '.tmpfile
+execute '6d'
+write
+call DumpSigns('followSymlink')
+
+call system('rm '.tmpfile)