patch 7.4.944
Problem: Writing tests for Vim script is hard.
Solution: Add assertEqual(), assertFalse() and assertTrue() functions. Add
the v:errors variable. Add the runtest script. Add a first new
style test script.
diff --git a/src/testdir/test_assert.vim b/src/testdir/test_assert.vim
new file mode 100644
index 0000000..61c77c5
--- /dev/null
+++ b/src/testdir/test_assert.vim
@@ -0,0 +1,19 @@
+" Test that the methods used for testing work.
+
+func Test_assertFalse()
+ call assertFalse(0)
+endfunc
+
+func Test_assertTrue()
+ call assertTrue(1)
+ call assertTrue(123)
+endfunc
+
+func Test_assertEqual()
+ let s = 'foo'
+ call assertEqual('foo', s)
+ let n = 4
+ call assertEqual(4, n)
+ let l = [1, 2, 3]
+ call assertEqual([1, 2, 3], l)
+endfunc