fix: renaming buffers doesn't interfere with directory hijack (#25)

tests/regression_spec.lua

@@ -0,0 +1,20 @@
+require("plenary.async").tests.add_to_env()
+local test_util = require("tests.test_util")
+
+a.describe("regression tests", function()
+  after_each(function()
+    test_util.reset_editor()
+  end)
+  -- see https://github.com/stevearc/oil.nvim/issues/25
+  a.it("can edit dirs that will be renamed to an existing buffer", function()
+    vim.cmd.edit({ args = { "README.md" } })
+    vim.cmd.vsplit()
+    vim.cmd.edit({ args = { "%:p:h" } })
+    assert.equals("oil", vim.bo.filetype)
+    vim.cmd.wincmd({ args = { "p" } })
+    assert.equals("markdown", vim.bo.filetype)
+    vim.cmd.edit({ args = { "%:p:h" } })
+    a.util.sleep(10)
+    assert.equals("oil", vim.bo.filetype)
+  end)
+end)