[Clang][unittests][NFC] Break up test in Callbacks.cpp

The Callbacks.cpp test was taking a long time to compile on some build bots
causing timeouts. This patch splits up that test into five separate cpp
files and a header file.

Reviewed By: gribozavr2

Differential Revision: https://reviews.llvm.org/D88886
diff --git a/clang/unittests/Tooling/RecursiveASTVisitorTests/CallbacksUnaryOperator.cpp b/clang/unittests/Tooling/RecursiveASTVisitorTests/CallbacksUnaryOperator.cpp
new file mode 100644
index 0000000..26c7555
--- /dev/null
+++ b/clang/unittests/Tooling/RecursiveASTVisitorTests/CallbacksUnaryOperator.cpp
@@ -0,0 +1,200 @@
+//===- unittests/Tooling/RecursiveASTVisitorTests/CallbacksUnaryOperator.cpp -===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "CallbacksCommon.h"
+
+TEST(RecursiveASTVisitor, StmtCallbacks_TraverseUnaryOperator) {
+  class RecordingVisitor : public RecordingVisitorBase<RecordingVisitor> {
+  public:
+    RecordingVisitor(ShouldTraversePostOrder ShouldTraversePostOrderValue)
+        : RecordingVisitorBase(ShouldTraversePostOrderValue) {}
+
+    bool TraverseUnaryOperator(UnaryOperator *UO) {
+      recordCallback(__func__, UO, [&]() {
+        RecordingVisitorBase::TraverseUnaryOperator(UO);
+      });
+      return true;
+    }
+
+    bool WalkUpFromStmt(Stmt *S) {
+      recordCallback(__func__, S,
+                     [&]() { RecordingVisitorBase::WalkUpFromStmt(S); });
+      return true;
+    }
+  };
+
+  StringRef Code = R"cpp(
+void test() {
+  1;
+  -2;
+  3;
+}
+)cpp";
+
+  EXPECT_TRUE(visitorCallbackLogEqual(
+      RecordingVisitor(ShouldTraversePostOrder::No), Code,
+      R"txt(
+WalkUpFromStmt CompoundStmt
+WalkUpFromStmt IntegerLiteral(1)
+TraverseUnaryOperator UnaryOperator(-)
+  WalkUpFromStmt UnaryOperator(-)
+  WalkUpFromStmt IntegerLiteral(2)
+WalkUpFromStmt IntegerLiteral(3)
+)txt"));
+
+  EXPECT_TRUE(visitorCallbackLogEqual(
+      RecordingVisitor(ShouldTraversePostOrder::Yes), Code,
+      R"txt(
+WalkUpFromStmt IntegerLiteral(1)
+TraverseUnaryOperator UnaryOperator(-)
+  WalkUpFromStmt IntegerLiteral(2)
+  WalkUpFromStmt UnaryOperator(-)
+WalkUpFromStmt IntegerLiteral(3)
+WalkUpFromStmt CompoundStmt
+)txt"));
+}
+
+TEST(RecursiveASTVisitor,
+     StmtCallbacks_TraverseUnaryOperator_WalkUpFromUnaryOperator) {
+  class RecordingVisitor : public RecordingVisitorBase<RecordingVisitor> {
+  public:
+    RecordingVisitor(ShouldTraversePostOrder ShouldTraversePostOrderValue)
+        : RecordingVisitorBase(ShouldTraversePostOrderValue) {}
+
+    bool TraverseUnaryOperator(UnaryOperator *UO) {
+      recordCallback(__func__, UO, [&]() {
+        RecordingVisitorBase::TraverseUnaryOperator(UO);
+      });
+      return true;
+    }
+
+    bool WalkUpFromStmt(Stmt *S) {
+      recordCallback(__func__, S,
+                     [&]() { RecordingVisitorBase::WalkUpFromStmt(S); });
+      return true;
+    }
+
+    bool WalkUpFromExpr(Expr *E) {
+      recordCallback(__func__, E,
+                     [&]() { RecordingVisitorBase::WalkUpFromExpr(E); });
+      return true;
+    }
+
+    bool WalkUpFromUnaryOperator(UnaryOperator *UO) {
+      recordCallback(__func__, UO, [&]() {
+        RecordingVisitorBase::WalkUpFromUnaryOperator(UO);
+      });
+      return true;
+    }
+  };
+
+  StringRef Code = R"cpp(
+void test() {
+  1;
+  -2;
+  3;
+}
+)cpp";
+
+  EXPECT_TRUE(visitorCallbackLogEqual(
+      RecordingVisitor(ShouldTraversePostOrder::No), Code,
+      R"txt(
+WalkUpFromStmt CompoundStmt
+WalkUpFromExpr IntegerLiteral(1)
+  WalkUpFromStmt IntegerLiteral(1)
+TraverseUnaryOperator UnaryOperator(-)
+  WalkUpFromUnaryOperator UnaryOperator(-)
+    WalkUpFromExpr UnaryOperator(-)
+      WalkUpFromStmt UnaryOperator(-)
+  WalkUpFromExpr IntegerLiteral(2)
+    WalkUpFromStmt IntegerLiteral(2)
+WalkUpFromExpr IntegerLiteral(3)
+  WalkUpFromStmt IntegerLiteral(3)
+)txt"));
+
+  EXPECT_TRUE(visitorCallbackLogEqual(
+      RecordingVisitor(ShouldTraversePostOrder::Yes), Code,
+      R"txt(
+WalkUpFromExpr IntegerLiteral(1)
+  WalkUpFromStmt IntegerLiteral(1)
+TraverseUnaryOperator UnaryOperator(-)
+  WalkUpFromExpr IntegerLiteral(2)
+    WalkUpFromStmt IntegerLiteral(2)
+  WalkUpFromUnaryOperator UnaryOperator(-)
+    WalkUpFromExpr UnaryOperator(-)
+      WalkUpFromStmt UnaryOperator(-)
+WalkUpFromExpr IntegerLiteral(3)
+  WalkUpFromStmt IntegerLiteral(3)
+WalkUpFromStmt CompoundStmt
+)txt"));
+}
+
+TEST(RecursiveASTVisitor, StmtCallbacks_WalkUpFromUnaryOperator) {
+  class RecordingVisitor : public RecordingVisitorBase<RecordingVisitor> {
+  public:
+    RecordingVisitor(ShouldTraversePostOrder ShouldTraversePostOrderValue)
+        : RecordingVisitorBase(ShouldTraversePostOrderValue) {}
+
+    bool WalkUpFromStmt(Stmt *S) {
+      recordCallback(__func__, S,
+                     [&]() { RecordingVisitorBase::WalkUpFromStmt(S); });
+      return true;
+    }
+
+    bool WalkUpFromExpr(Expr *E) {
+      recordCallback(__func__, E,
+                     [&]() { RecordingVisitorBase::WalkUpFromExpr(E); });
+      return true;
+    }
+
+    bool WalkUpFromUnaryOperator(UnaryOperator *UO) {
+      recordCallback(__func__, UO, [&]() {
+        RecordingVisitorBase::WalkUpFromUnaryOperator(UO);
+      });
+      return true;
+    }
+  };
+
+  StringRef Code = R"cpp(
+void test() {
+  1;
+  -2;
+  3;
+}
+)cpp";
+
+  EXPECT_TRUE(visitorCallbackLogEqual(
+      RecordingVisitor(ShouldTraversePostOrder::No), Code,
+      R"txt(
+WalkUpFromStmt CompoundStmt
+WalkUpFromExpr IntegerLiteral(1)
+  WalkUpFromStmt IntegerLiteral(1)
+WalkUpFromUnaryOperator UnaryOperator(-)
+  WalkUpFromExpr UnaryOperator(-)
+    WalkUpFromStmt UnaryOperator(-)
+WalkUpFromExpr IntegerLiteral(2)
+  WalkUpFromStmt IntegerLiteral(2)
+WalkUpFromExpr IntegerLiteral(3)
+  WalkUpFromStmt IntegerLiteral(3)
+)txt"));
+
+  EXPECT_TRUE(visitorCallbackLogEqual(
+      RecordingVisitor(ShouldTraversePostOrder::Yes), Code,
+      R"txt(
+WalkUpFromExpr IntegerLiteral(1)
+  WalkUpFromStmt IntegerLiteral(1)
+WalkUpFromExpr IntegerLiteral(2)
+  WalkUpFromStmt IntegerLiteral(2)
+WalkUpFromUnaryOperator UnaryOperator(-)
+  WalkUpFromExpr UnaryOperator(-)
+    WalkUpFromStmt UnaryOperator(-)
+WalkUpFromExpr IntegerLiteral(3)
+  WalkUpFromStmt IntegerLiteral(3)
+WalkUpFromStmt CompoundStmt
+)txt"));
+}