test: add more profile tests

- Add a test to make sure that 'profile dump' does not reset the profile.
- Add a test to make sure that 'profile stop' does reset the profile.

test/functional/ex_cmds/profile_spec.lua

@@ -6,6 +6,9 @@ local eval     = helpers.eval
 local command  = helpers.command
 local eq, neq  = helpers.eq, helpers.neq
 local tempfile = helpers.tmpname()
+local source   = helpers.source
+local matches  = helpers.matches
+local read_file = helpers.read_file
 
 -- tmpname() also creates the file on POSIX systems. Remove it again.
 -- We just need the name, ignoring any race conditions.
@@ -32,7 +35,8 @@ describe(':profile', function()
     end
   end)
 
-  it('dump', function()
+  describe('dump', function()
+    it('works', function()
       eq(0, eval('v:profiling'))
       command('profile start ' .. tempfile)
       eq(1, eval('v:profiling'))
@@ -41,11 +45,57 @@ describe(':profile', function()
       assert_file_exists(tempfile)
     end)
 
-  it('stop', function()
+    it('not resetting the profile', function()
+      source([[
+        function! Test()
+        endfunction
+      ]])
+      command('profile start ' .. tempfile)
+      assert_file_exists_not(tempfile)
+      command('profile func Test')
+      command('call Test()')
+      command('profile dump')
+      assert_file_exists(tempfile)
+      local profile = read_file(tempfile)
+      matches('Called 1 time', profile)
+      command('call Test()')
+      command('profile dump')
+      assert_file_exists(tempfile)
+      profile = read_file(tempfile)
+      matches('Called 2 time', profile)
+      command('profile stop')
+    end)
+  end)
+
+  describe('stop', function()
+    it('works', function()
       command('profile start ' .. tempfile)
       assert_file_exists_not(tempfile)
       command('profile stop')
       assert_file_exists(tempfile)
       eq(0, eval('v:profiling'))
     end)
+
+    it('resetting the profile', function()
+      source([[
+        function! Test()
+        endfunction
+      ]])
+      command('profile start ' .. tempfile)
+      assert_file_exists_not(tempfile)
+      command('profile func Test')
+      command('call Test()')
+      command('profile stop')
+      assert_file_exists(tempfile)
+      local profile = read_file(tempfile)
+      matches('Called 1 time', profile)
+      command('profile start ' .. tempfile)
+      command('profile func Test')
+      command('call Test()')
+      command('profile stop')
+      assert_file_exists(tempfile)
+      profile = read_file(tempfile)
+      matches('Called 1 time', profile)
+    end)
+  end)
 end)