patch 7.4.1494

Problem:    clr_history() does not work properly.
Solution:   Increment hisptr. Add a test. (Yegappan Lakshmanan)

src/ex_getln.c

@@ -5783,6 +5783,7 @@ clr_history(int histype)
 	{
 	    vim_free(hisptr->hisstr);
 	    clear_hist_entry(hisptr);
+	    hisptr++;
 	}
 	hisidx[histype] = -1;	/* mark history as cleared */
 	hisnum[histype] = 0;	/* reset identifier counter */

src/testdir/Make_all.mak

@@ -175,6 +175,7 @@ NEW_TESTS = test_arglist.res \
 	    test_cdo.res \
 	    test_channel.res \
 	    test_hardcopy.res \
+	    test_history.res \
 	    test_increment.res \
 	    test_json.res \
 	    test_langmap.res \

src/testdir/test_history.vim

@@ -0,0 +1,65 @@
+" Tests for the history functions
+
+if !has('cmdline_hist')
+  finish
+endif
+
+set history=7
+
+function History_Tests(hist)
+  " First clear the history
+  call histadd(a:hist, 'dummy')
+  call assert_true(histdel(a:hist))
+  call assert_equal(-1, histnr(a:hist))
+  call assert_equal('', histget(a:hist))
+
+  call assert_true(histadd(a:hist, 'ls'))
+  call assert_true(histadd(a:hist, 'buffers'))
+  call assert_equal('buffers', histget(a:hist))
+  call assert_equal('ls', histget(a:hist, -2))
+  call assert_equal('ls', histget(a:hist, 1))
+  call assert_equal('', histget(a:hist, 5))
+  call assert_equal('', histget(a:hist, -5))
+  call assert_equal(2, histnr(a:hist))
+  call assert_true(histdel(a:hist, 2))
+  call assert_false(histdel(a:hist, 7))
+  call assert_equal(1, histnr(a:hist))
+  call assert_equal('ls', histget(a:hist, -1))
+
+  call assert_true(histadd(a:hist, 'buffers'))
+  call assert_true(histadd(a:hist, 'ls'))
+  call assert_equal('ls', histget(a:hist, -1))
+  call assert_equal(4, histnr(a:hist))
+
+  " Test for removing entries matching a pattern
+  for i in range(1, 3)
+      call histadd(a:hist, 'text_' . i)
+  endfor
+  call assert_true(histdel(a:hist, 'text_\d\+'))
+  call assert_equal('ls', histget(a:hist, -1))
+
+  " Test for freeing the entire history list
+  for i in range(1, 7)
+      call histadd(a:hist, 'text_' . i)
+  endfor
+  call histdel(a:hist)
+  for i in range(1, 7)
+    call assert_equal('', histget(a:hist, i))
+    call assert_equal('', histget(a:hist, i - 7 - 1))
+  endfor
+endfunction
+
+function Test_History()
+  for h in ['cmd', ':', '', 'search', '/', '?', 'expr', '=', 'input', '@', 'debug', '>']
+    call History_Tests(h)
+  endfor
+
+  " Negative tests
+  call assert_false(histdel('abc'))
+  call assert_equal('', histget('abc'))
+  call assert_fails('call histdel([])', 'E730:')
+  call assert_equal('', histget(10))
+  call assert_fails('call histget([])', 'E730:')
+  call assert_equal(-1, histnr('abc'))
+  call assert_fails('call histnr([])', 'E730:')
+endfunction

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1494,
 /**/
     1493,
 /**/