patch 8.2.2343: Vim9: return type of readfile() is any
Problem: Vim9: return type of readfile() is any.
Solution: Add readblob() so that readfile() can be expected to always
return a list of strings. (closes #7671)
diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index 40cfdcb..3d474f3 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -623,6 +623,32 @@
eval expand('sautest')->readdirex((e) => e.name[0] !=# '.')
enddef
+def Test_readblob()
+ var blob = 0z12341234
+ writefile(blob, 'Xreadblob')
+ var read: blob = readblob('Xreadblob')
+ assert_equal(blob, read)
+
+ var lines =<< trim END
+ var read: list<string> = readblob('Xreadblob')
+ END
+ CheckDefAndScriptFailure(lines, 'E1012: Type mismatch; expected list<string> but got blob', 1)
+ delete('Xreadblob')
+enddef
+
+def Test_readfile()
+ var text = ['aaa', 'bbb', 'ccc']
+ writefile(text, 'Xreadfile')
+ var read: list<string> = readfile('Xreadfile')
+ assert_equal(text, read)
+
+ var lines =<< trim END
+ var read: dict<string> = readfile('Xreadfile')
+ END
+ CheckDefAndScriptFailure(lines, 'E1012: Type mismatch; expected dict<string> but got list<string>', 1)
+ delete('Xreadfile')
+enddef
+
def Test_remove_return_type()
var l = remove({one: [1, 2], two: [3, 4]}, 'one')
var res = 0