1 files changed, 18 insertions, 0 deletions
diff --git a/test/functional/legacy/eval_spec.lua b/test/functional/legacy/eval_spec.lua
index 1c81b47ed6..9304e3b331 100644
--- a/test/functional/legacy/eval_spec.lua
+++ b/test/functional/legacy/eval_spec.lua
@@ -693,4 +693,22 @@ describe('eval', function()
       start:
       6]])
   end)
+
+  it('substring and variable name', function()
+    execute("let str = 'abcdef'")
+    execute('let n = 3')
+    eq('def', eval('str[n:]'))
+    eq('abcd', eval('str[:n]'))
+    eq('d', eval('str[n:n]'))
+    execute('unlet n')
+    execute('let nn = 3')
+    eq('def', eval('str[nn:]'))
+    eq('abcd', eval('str[:nn]'))
+    eq('d', eval('str[nn:nn]'))
+    execute('unlet nn')
+    execute('let b:nn = 4')
+    eq('ef', eval('str[b:nn:]'))
+    eq('abcde', eval('str[:b:nn]'))
+    eq('e', eval('str[b:nn:b:nn]'))
+  end)
 end)