test: add test-binary to print the number of ghost messages

This one-liner seems preferable to the complications of depending on
delve, getting the binary name right and parsing the output.

test/.gitignore

@@ -7,4 +7,5 @@ smtp-dummy
 symbol-test
 make-db-version
 test-results
+ghost-report
 tmp.*

test/Makefile.local

@@ -38,6 +38,9 @@ $(dir)/parse-time: $(dir)/parse-time.o parse-time-string/parse-time-string.o
 $(dir)/make-db-version: $(dir)/make-db-version.o
 	$(call quiet,CXX) $^ -o $@ $(LDFLAGS) $(XAPIAN_LDFLAGS)
 
+$(dir)/ghost-report: $(dir)/ghost-report.o
+	$(call quiet,CXX) $^ -o $@ $(LDFLAGS) $(XAPIAN_LDFLAGS)
+
 .PHONY: test check
 
 test_main_srcs=$(dir)/arg-test.c \
@@ -47,6 +50,7 @@ test_main_srcs=$(dir)/arg-test.c \
 	      $(dir)/smtp-dummy.c \
 	      $(dir)/symbol-test.cc \
 	      $(dir)/make-db-version.cc \
+	      $(dir)/ghost-report.cc
 
 test_srcs=$(test_main_srcs) $(dir)/database-test.c
 

test/ghost-report.cc

@@ -0,0 +1,14 @@
+#include <iostream>
+#include <cstdlib>
+#include <xapian.h>
+
+int main(int argc, char **argv) {
+
+    if (argc < 2) {
+	std::cerr << "usage: ghost-report xapian-dir" << std::endl;
+	exit(1);
+    }
+
+    Xapian::Database db(argv[1]);
+    std::cout << db.get_termfreq("Tghost") << std::endl;
+}