C++: Add PreprocBlock tests.

Author: geoffw0

cpp/ql/test/library-tests/headers/preprocBlock/header.h

@@ -0,0 +1,8 @@
+// header.h
+
+#ifndef HEADER_H
+#define HEADER_H
+
+	// ...
+
+#endif // HEADER_H

cpp/ql/test/library-tests/headers/preprocBlock/preprocblock.cpp

@@ -0,0 +1,25 @@
+// preprocblock.cpp
+
+#include "header.h"
+#define GREEN
+
+#ifdef RED
+#elif defined GREEN
+	#include "header.h"
+
+	#ifndef BLUE
+		#include "header.h"
+	#endif
+
+	#if 0
+		#include "header.h" // not reached
+	#else
+		#include "header.h"
+	#endif
+
+	#include "header.h"
+#else
+
+	// ...
+
+#endif

cpp/ql/test/library-tests/headers/preprocBlock/preprocblock.expected

@@ -0,0 +1,10 @@
+| #elif defined GREEN | preprocblock.cpp:10:0:11:0 | #ifndef BLUE |
+| #elif defined GREEN | preprocblock.cpp:14:0:15:0 | #if 0 |
+| #elif defined GREEN | preprocblock.cpp:16:0:17:0 | #else |
+| (no parent) | file://:0:0:0:0 |  |
+| (no parent) | header.h:0:0:8:0 | header.h |
+| (no parent) | preprocblock.cpp:0:0:25:0 | preprocblock.cpp |
+| header.h | header.h:3:0:7:0 | #ifndef HEADER_H |
+| preprocblock.cpp | preprocblock.cpp:6:0:6:0 | #ifdef RED |
+| preprocblock.cpp | preprocblock.cpp:7:0:20:0 | #elif defined GREEN |
+| preprocblock.cpp | preprocblock.cpp:21:0:24:0 | #else |

cpp/ql/test/library-tests/headers/preprocBlock/preprocblock.ql

@@ -0,0 +1,6 @@
+import cpp
+import semmle.code.cpp.headers.PreprocBlock
+
+from PreprocessorBlock b, string parent
+where if exists(b.getParent()) then parent = b.getParent().toString() else parent = "(no parent)"
+select parent, b

cpp/ql/test/library-tests/headers/preprocBlock/preprocinclude.expected

@@ -0,0 +1,5 @@
+| preprocblock.cpp:3:1:3:19 | #include "header.h" | preprocblock.cpp:0:0:25:0 | preprocblock.cpp |
+| preprocblock.cpp:8:2:8:20 | #include "header.h" | preprocblock.cpp:7:0:20:0 | #elif defined GREEN |
+| preprocblock.cpp:11:3:11:21 | #include "header.h" | preprocblock.cpp:10:0:11:0 | #ifndef BLUE |
+| preprocblock.cpp:17:3:17:21 | #include "header.h" | preprocblock.cpp:16:0:17:0 | #else |
+| preprocblock.cpp:20:2:20:20 | #include "header.h" | preprocblock.cpp:7:0:20:0 | #elif defined GREEN |

cpp/ql/test/library-tests/headers/preprocBlock/preprocinclude.ql

@@ -0,0 +1,6 @@
+import cpp
+import semmle.code.cpp.headers.PreprocBlock
+
+from PreprocessorBlock b, Include i
+where b.getAnInclude() = i
+select i, b