util.dbuffer: Simplify test case
An earlier theory involved the bug being related to collapsing multiple
items, so it exercised that too.
Also correct the comment, it referred to the space in "hello world" in
an earlier version before the test string was changed to "foobar", which
was what was tested in a REPL
--- a/spec/util_dbuffer_spec.lua Mon Aug 24 16:18:13 2020 +0100
+++ b/spec/util_dbuffer_spec.lua Mon Aug 24 17:28:48 2020 +0200
@@ -69,10 +69,9 @@
it("works after discard", function ()
local b = dbuffer.new(256);
- assert.truthy(b:write("foo"));
- assert.truthy(b:write("bar"));
+ assert.truthy(b:write("foobar"));
assert.equals("foobar", b:sub(1, 6));
- assert.truthy(b:discard(3)) -- until the space
+ assert.truthy(b:discard(3)); -- consume "foo"
assert.equals("bar", b:sub(1, 3));
end);