[clang-tools-extra] [clang-doc] Add regression test for test comments in macros (PR #132510)

[Paul Kirth via cfe-commits]

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@@ -0,0 +1,34 @@
+// Fixes #59819. The underlying problem was fixed in https://reviews.llvm.org/D142560, but this patch adds a proper regression test.
+// RUN: rm -rf %t && mkdir -p %t
+// RUN: clang-doc --format=md --doxygen --output=%t --executor=standalone %s
+// RUN: FileCheck %s < %t/GlobalNamespace/MyClass.md --check-prefix=MD-MYCLASS-LINE
+// RUN: FileCheck %s < %t/GlobalNamespace/MyClass.md --check-prefix=MD-MYCLASS
+
+// RUN: clang-doc --format=html --doxygen --output=%t --executor=standalone %s
+// RUN: FileCheck %s < %t/GlobalNamespace/MyClass.html --check-prefix=HTML-MYCLASS-LINE
+// RUN: FileCheck %s < %t/GlobalNamespace/MyClass.html --check-prefix=HTML-MYCLASS
+
+#define DECLARE_METHODS                                           \
+    /**   							  \
+     * @brief Declare a method to calculate the sum of two numbers\
+     */                                                           \
+    int Add(int a, int b) {                                       \
+        return a + b;                                             \
+    }
+
+// MD-MYCLASS: ### Add
+// MD-MYCLASS: *public int Add(int a, int b)*
+// MD-MYCLASS: **brief** Declare a method to calculate the sum of two numbers
+
+// HTML-MYCLASS: <p>public int Add(int a, int b)</p>
+// HTML-MYCLASS: <div>brief</div>
+// HTML-MYCLASS: <p> Declare a method to calculate the sum of two numbers</p>
+
+
+class MyClass {
+public:
+// MD-MYCLASS-LINE: *Defined at {{.*}}clang-tools-extra{{[\/]}}test{{[\/]}}clang-doc{{[\/]}}macro.cpp#[[@LINE+2]]*
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ilovepi wrote:

Looking at the premerge CI failure, this line fails to match, because this file is `comments-in-macros.cpp` and not `macro.cpp`.  You can update your check to fix this. Same problem for the check below this.

https://github.com/llvm/llvm-project/pull/132510