feat: formatters can use $RELATIVE_FILEPATH in args (#349)

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/fs_spec.lua b/tests/fs_spec.lua
new file mode 100644
index 0000000..2d788c9
--- /dev/null
+++ b/tests/fs_spec.lua
@@ -0,0 +1,22 @@
+local fs = require("conform.fs")
+
+describe("fs", function()
+  local relative_paths = {
+    { "/home", "/home/file.txt", "file.txt" },
+    { "/home/", "/home/file.txt", "file.txt" },
+    { "/home", "/foo/file.txt", "../foo/file.txt" },
+    { "/home/foo", "/home/bar/file.txt", "../bar/file.txt" },
+    { "/home", "/file.txt", "../file.txt" },
+    { "/home", "/home/foo/file.txt", "foo/file.txt" },
+    { ".", "foo/file.txt", "foo/file.txt" },
+    { "home", "home/file.txt", "file.txt" },
+    { "home", "file.txt", "../file.txt" },
+  }
+
+  it("relative_path", function()
+    for _, paths in ipairs(relative_paths) do
+      local source, target, expected = unpack(paths)
+      assert.are.same(fs.relative_path(source, target), expected)
+    end
+  end)
+end)