From dbd2ff7adca9b49e4bfa7bc3ec8b83bd437f8cb7 Mon Sep 17 00:00:00 2001
From: Benoit Daloze <eregontp@gmail.com>
Date: Wed, 28 Jan 2026 22:30:21 +0100
Subject: Update to ruby/spec@83e26c9

---
 spec/ruby/core/file/basename_spec.rb |  6 +-----
 spec/ruby/core/file/dirname_spec.rb  | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 5 deletions(-)

(limited to 'spec/ruby/core/file')

diff --git a/spec/ruby/core/file/basename_spec.rb b/spec/ruby/core/file/basename_spec.rb
index 87695ab97b..66a5b56ed9 100644
--- a/spec/ruby/core/file/basename_spec.rb
+++ b/spec/ruby/core/file/basename_spec.rb
@@ -162,11 +162,7 @@ describe "File.basename" do
 
   it "rejects strings encoded with non ASCII-compatible encodings" do
     Encoding.list.reject(&:ascii_compatible?).reject(&:dummy?).each do |enc|
-      begin
-        path = "/foo/bar".encode(enc)
-      rescue Encoding::ConverterNotFoundError
-        next
-      end
+      path = "/foo/bar".encode(enc)
 
       -> {
         File.basename(path)
diff --git a/spec/ruby/core/file/dirname_spec.rb b/spec/ruby/core/file/dirname_spec.rb
index 8e6016ce6f..1b006af783 100644
--- a/spec/ruby/core/file/dirname_spec.rb
+++ b/spec/ruby/core/file/dirname_spec.rb
@@ -78,7 +78,33 @@ describe "File.dirname" do
     File.dirname("foo/../").should == "foo"
   end
 
+  it "rejects strings encoded with non ASCII-compatible encodings" do
+    Encoding.list.reject(&:ascii_compatible?).reject(&:dummy?).each do |enc|
+      path = "/foo/bar".encode(enc)
+      -> {
+        File.dirname(path)
+      }.should raise_error(Encoding::CompatibilityError)
+    end
+  end
+
+  it "works with all ASCII-compatible encodings" do
+    Encoding.list.select(&:ascii_compatible?).each do |enc|
+      File.dirname("/foo/bar".encode(enc)).should == "/foo".encode(enc)
+    end
+  end
+
+  it "handles Shift JIS 0x5C (\\) as second byte of a multi-byte sequence" do
+    # dir/fileソname.txt
+    path = "dir/file\x83\x5cname.txt".b.force_encoding(Encoding::SHIFT_JIS)
+    path.valid_encoding?.should be_true
+    File.dirname(path).should == "dir"
+  end
+
   platform_is_not :windows do
+    it "ignores repeated leading / (edge cases on non-windows)" do
+      File.dirname("/////foo/bar/").should == "/foo"
+    end
+
     it "returns all the components of filename except the last one (edge cases on non-windows)" do
       File.dirname('/////').should == '/'
       File.dirname("//foo//").should == "/"
@@ -94,6 +120,13 @@ describe "File.dirname" do
       File.dirname("//foo//").should == "//foo"
       File.dirname('/////').should == '//'
     end
+
+    it "handles Shift JIS 0x5C (\\) as second byte of a multi-byte sequence (windows)" do
+      # dir\fileソname.txt
+      path = "dir\\file\x83\x5cname.txt".b.force_encoding(Encoding::SHIFT_JIS)
+      path.valid_encoding?.should be_true
+      File.dirname(path).should == "dir"
+    end
   end
 
   it "accepts an object that has a #to_path method" do
-- 
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