[clang-tools-extra] [include-cleaner][NFC] expose and test `normalizePath` helper (PR #189364)

[Daniil Dudkin via cfe-commits]

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@@ -98,5 +99,18 @@ TEST(RecordedIncludesTest, MatchVerbatimMixedAbsoluteRelative) {
   EXPECT_THAT(Inc.match(Header("<bar.h>")), IsEmpty());
 }
 
+TEST(NormalizePathTest, RemovesDotSegments) {
+  EXPECT_EQ(normalizePath("foo/./bar/../baz").str(), "foo/baz");
+  EXPECT_EQ(normalizePath("foo/bar/").str(), "foo/bar");
+}
+
+TEST(NormalizePathTest, CanonicalizesSeparators) {
+  EXPECT_EQ(normalizePath("foo\\bar").str(), "foo/bar");
+}
+
+TEST(NormalizePathTest, PreservesRootPath) {
+  EXPECT_EQ(normalizePath("/").str(), "/");
+}
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unterumarmung wrote:

Done

https://github.com/llvm/llvm-project/pull/189364