patch 8.1.1111: it is not easy to check for infinity
Problem: It is not easy to check for infinity.
Solution: Add isinf(). (Ozaki Kiichi, closes #3787)
diff --git a/src/testdir/test_float_func.vim b/src/testdir/test_float_func.vim
index 32b985e..48fae74 100644
--- a/src/testdir/test_float_func.vim
+++ b/src/testdir/test_float_func.vim
@@ -288,13 +288,24 @@
call assert_fails("call trunc('')", 'E808:')
endfunc
+func Test_isinf()
+ call assert_equal(1, isinf(1.0/0.0))
+ call assert_equal(-1, isinf(-1.0/0.0))
+ call assert_false(isinf(1.0))
+ call assert_false(isinf(0.0/0.0))
+ call assert_false(isinf('a'))
+ call assert_false(isinf([]))
+ call assert_false(isinf({}))
+endfunc
+
func Test_isnan()
- call assert_equal(0, isnan(1.0))
- call assert_equal(1, isnan(0.0/0.0))
- call assert_equal(0, isnan(1.0/0.0))
- call assert_equal(0, isnan('a'))
- call assert_equal(0, isnan([]))
- call assert_equal(0, isnan({}))
+ call assert_true(isnan(0.0/0.0))
+ call assert_false(isnan(1.0))
+ call assert_false(isnan(1.0/0.0))
+ call assert_false(isnan(-1.0/0.0))
+ call assert_false(isnan('a'))
+ call assert_false(isnan([]))
+ call assert_false(isnan({}))
endfunc
" This was converted from test65