Refactor tests to be isolated.

test/README.markdown

@@ -9,13 +9,18 @@ $ ./test.sh
 
 ### Add a new test
 
-1. Add new test function to `test.vim`.
-2. Add a call to the test function in `test.vim`.
-3. Run the tests.
-4. Inspect output from the new test function.  If good, copy it to `<blah>.ok`.
-5. Run the tests to ensure new test's output is verified.
-6. `rm *.out` and commit changes.
+- Add a test file named like `testFoo.vim`.  It should have this structure:
 
-### Potential test pitfalls
+```viml
+source helper.vim
+call Setup()
 
-Currently the tests are order-dependent because the sign id counter isn't reset between tests.
+" test code here
+
+quit!
+```
+
+- Run the tests.
+- Inspect output from the new test.  If good, copy it to `foo.ok`.
+- Run the tests to ensure new test's output is verified.
+- `rm *.out` and commit changes.

test/helper.vim

@@ -0,0 +1,15 @@
+set runtimepath+=../
+source ../plugin/gitgutter.vim
+
+function! Setup()
+  call system('git checkout fixture.txt')
+  edit! fixture.txt
+  sign unplace *
+endfunction
+
+function! DumpSigns(filename)
+  execute 'redir! > ' a:filename.'.out'
+    silent execute 'sign place'
+  redir END
+endfunction
+

test/modifyLines.ok

@@ -1,4 +1,4 @@
 
 --- Signs ---
 Signs for fixture.txt:
-    line=1  id=3001  name=GitGutterLineModified
+    line=1  id=3000  name=GitGutterLineModified

test/orphanedSigns.ok

@@ -1,4 +1,4 @@
 
 --- Signs ---
 Signs for fixture.txt:
-    line=6  id=3005  name=GitGutterLineAdded
+    line=6  id=3001  name=GitGutterLineAdded

test/removeFirstLines.ok

@@ -1,4 +1,4 @@
 
 --- Signs ---
 Signs for fixture.txt:
-    line=1  id=3003  name=GitGutterLineRemovedFirstLine
+    line=1  id=3000  name=GitGutterLineRemovedFirstLine

test/removeLines.ok

@@ -1,4 +1,4 @@
 
 --- Signs ---
 Signs for fixture.txt:
-    line=4  id=3002  name=GitGutterLineRemoved
+    line=4  id=3000  name=GitGutterLineRemoved

test/test.sh

@@ -1,13 +1,19 @@
 #!/usr/bin/env bash
 
+# TODO: exit with non-zero status code when tests fail.
+# TODO: quit vim after each testcase inside loop below (instead of in testcase).
+
 rm -f *.out
 
-# Run the tests.
-vim -N -u NONE -S test.vim
-
-# Verify the outputs.
-for expected in *.ok; do
-  name=${expected%.*}
+for testcase in test*.vim; do
+  vim -N -u NONE -S $testcase                                   # testFoo.vim
+  testname=${testcase%.*}                                       # testFoo
+  name=${testname:4}                                            # Foo
+  name="$(tr '[:upper:]' '[:lower:]' <<< ${name:0:1})${name:1}" # foo
+  expected=$name.ok
   actual=$name.out
   diff $expected $actual && echo "$name ok" || echo "$name failed"
 done
+
+git checkout fixture.txt
+

test/test.vim

@@ -1,82 +0,0 @@
-set runtimepath+=../
-source ../plugin/gitgutter.vim
-
-
-function! s:setup()
-  call system('git checkout fixture.txt')
-  edit! fixture.txt
-  sign unplace *
-endfunction
-
-function! s:dumpSigns(filename)
-  execute 'redir! > ' a:filename.'.out'
-    silent execute 'sign place'
-  redir END
-endfunction
-
-
-"
-" The tests.
-"
-
-function! s:testNoModifications()
-  call s:setup()
-  call s:dumpSigns('noModifications')
-endfunction
-
-function! s:testAddLines()
-  call s:setup()
-  normal ggo*
-  write
-  call s:dumpSigns('addLines')
-endfunction
-
-function! s:testModifyLines()
-  call s:setup()
-  normal ggi*
-  write
-  call s:dumpSigns('modifyLines')
-endfunction
-
-function! s:testRemoveLines()
-  call s:setup()
-  execute '5d'
-  write
-  call s:dumpSigns('removeLines')
-endfunction
-
-function! s:testRemoveFirstLines()
-  call s:setup()
-  execute '1d'
-  write
-  call s:dumpSigns('removeFirstLines')
-endfunction
-
-function! s:testOrphanedSigns()
-  call s:setup()
-  execute "normal 5GoX\<CR>Y"
-  write
-  execute '6d'
-  write
-  call s:dumpSigns('orphanedSigns')
-endfunction
-
-"
-" Execute the tests.
-"
-
-call s:testNoModifications()
-call s:testAddLines()
-call s:testModifyLines()
-call s:testRemoveLines()
-call s:testRemoveFirstLines()
-call s:testOrphanedSigns()
-
-
-"
-" Cleanup.
-"
-
-call system('git checkout fixture.txt')
-quit!
-

test/testAddLines.vim

@@ -0,0 +1,8 @@
+source helper.vim
+call Setup()
+
+normal ggo*
+write
+call DumpSigns('addLines')
+
+quit!

test/testModifyLines.vim

@@ -0,0 +1,8 @@
+source helper.vim
+call Setup()
+
+normal ggi*
+write
+call DumpSigns('modifyLines')
+
+quit!

test/testNoModifications.vim

@@ -0,0 +1,6 @@
+source helper.vim
+call Setup()
+
+call DumpSigns('noModifications')
+
+quit!

test/testOrphanedSigns.vim

@@ -0,0 +1,10 @@
+source helper.vim
+call Setup()
+
+execute "normal 5GoX\<CR>Y"
+write
+execute '6d'
+write
+call DumpSigns('orphanedSigns')
+
+quit!

test/testRemoveFirstLines.vim

@@ -0,0 +1,8 @@
+source helper.vim
+call Setup()
+
+execute '1d'
+write
+call DumpSigns('removeFirstLines')
+
+quit!

test/testRemoveLines.vim

@@ -0,0 +1,8 @@
+source helper.vim
+call Setup()
+
+execute '5d'
+write
+call DumpSigns('removeLines')
+
+quit!