use Google C++ Testing Framework for libapt tests

My commit 45df0ad2 from 26. Nov 2009 had a little remark:
"The commit also includes a very very simple testapp."
This was never intended to be permanent, but as usually…

The commit adds the needed make magic to compile gtest statically
as it is required and links it against a small runner. All previous
testcase binaries are reimplemented in gtest and combined in this
runner. While most code is a 1:1 translation some had to be rewritten
like compareversion_test.cc, but the coverage remains the same.

1 files changed, 63 insertions, 121 deletions

diff --git a/test/libapt/makefile b/test/libapt/makefile
index e03b5e6aa..69a13fd92 100644
--- a/test/libapt/makefile
+++ b/test/libapt/makefile
@@ -8,124 +8,66 @@ APT_DOMAIN=none
 include ../../buildlib/defaults.mak
 
 .PHONY: test
-test:
-	./run-tests
-
-# Program for testing getLanguageCode
-PROGRAM = getLanguages${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = getlanguages_test.cc
-include $(PROGRAM_H)
-
-PROGRAM = getArchitectures${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = getarchitectures_test.cc
-include $(PROGRAM_H)
-
-# Program for testing ParseDepends
-PROGRAM = ParseDepends${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = parsedepends_test.cc
-include $(PROGRAM_H)
-
-# Program for testing GetListOfFilesInDir
-PROGRAM = GetListOfFilesInDir${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = getlistoffilesindir_test.cc
-include $(PROGRAM_H)
-
-# Program for testing CommandLine reconstruction
-PROGRAM = Commandline${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = commandline_test.cc
-include $(PROGRAM_H)
-
-# Program for testing CommandLine reconstruction
-PROGRAM = CommandlineAsString${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = commandlineasstring_test.cc
-include $(PROGRAM_H)
-
-# Program for testing debians version comparing
-PROGRAM = CompareVersion${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = compareversion_test.cc
-include $(PROGRAM_H)
-
-# test the GlobalError stack class
-PROGRAM = GlobalError${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = globalerror_test.cc
-include $(PROGRAM_H)
-
-# test the different Hashsum classes
-PROGRAM = HashSums${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = hashsums_test.cc
-include $(PROGRAM_H)
-
-# test the strutils stuff
-PROGRAM = StrUtil${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = strutil_test.cc
-include $(PROGRAM_H)
-
-# test the URI parsing stuff
-PROGRAM = URI${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = uri_test.cc
-include $(PROGRAM_H)
-
-# test the Configuration class
-PROGRAM = Configuration${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = configuration_test.cc
-include $(PROGRAM_H)
-
-# test cdroms core FindPackages
-PROGRAM = CdromFindPackages${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = cdromfindpackages_test.cc
-include $(PROGRAM_H)
-
-# test cdroms index reduction for source.list
-PROGRAM = CdromReduceSourceList${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = cdromreducesourcelist_test.cc
-include $(PROGRAM_H)
-
-# test cdroms FindMountPointForDevice for udev autodetection
-PROGRAM = CdromFindMountPointForDevice${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = cdromfindmountpointfordevice_test.cc
-include $(PROGRAM_H)
-
-# test IndexCopy::ConvertToSourceList
-PROGRAM = IndexCopyToSourceList${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = indexcopytosourcelist_test.cc
-
-# test fileutls
-PROGRAM = FileUtl${BASENAME}
-SLIBS = -lapt-pkg 
-SOURCE = fileutl_test.cc
-include $(PROGRAM_H)
-
-# test tagfile
-PROGRAM = PkgTagFile${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = tagfile_test.cc
-include $(PROGRAM_H)
-
-# test sourcelist
-PROGRAM = SourceList${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = sourcelist_test.cc
-include $(PROGRAM_H)
-
-# test install-progress
-PROGRAM = InstallProgress${BASENAME}
-SLIBS = -lapt-pkg
-SOURCE = install_progress_test.cc
-include $(PROGRAM_H)
-
+test: $(BIN)/gtest$(BASENAME)
+	MALLOC_PERTURB_=21 MALLOC_CHECK_=2 LD_LIBRARY_PATH=$(LIB) $(BIN)/gtest$(BASENAME)
+
+$(BIN)/gtest$(BASENAME): $(LIB)/gtest.a
+
+PROGRAM = gtest${BASENAME}
+SLIBS = -lapt-pkg -pthread $(LIB)/gtest.a
+LIB_MAKES = apt-pkg/makefile
+SOURCE = gtest_runner.cc $(wildcard *-helpers.cc *_test.cc)
+include $(PROGRAM_H)
+
+
+MKDIRS += $(OBJ) $(LIB)
+LOCAL=gtest
+SOURCE=gtest-all
+gtest-OBJS := $(addprefix $(OBJ)/,$(addsuffix .o,$(SOURCE)))
+
+# The rest of the file is based on the example found in
+# /usr/share/doc/libgtest-dev/examples/make/Makefile
+GTEST_DIR = /usr/src/gtest
+
+# Flags passed to the preprocessor.
+# Set Google Test's header directory as a system directory, such that
+# the compiler doesn't generate warnings in Google Test headers.
+CPPFLAGS += -isystem $(GTEST_DIR)/include
+
+# Flags passed to the C++ compiler.
+CXXFLAGS += -pthread
+# disable some flags for gtest again
+CXXFLAGS+= -Wno-missing-declarations
+CXXFLAGS+= -Wno-missing-field-initializers
+CXXFLAGS+= -Wno-suggest-attribute=pure -Wno-suggest-attribute=const -Wno-suggest-attribute=noreturn
+
+# All Google Test headers.  Usually you shouldn't change this definition.
+GTEST_HEADERS = /usr/include/gtest/*.h \
+                /usr/include/gtest/internal/*.h
+
+# House-keeping build targets.
+.PHONY: clean/gtest veryclean/gtest
+clean: clean/gtest
+clean/gtest:
+	rm -f $(gtest-OBJS)
+veryclean: veryclean/gtest
+veryclean/gtest: clean/gtest
+	rm -f $(LIB)/gtest.a
+
+# Usually you shouldn't tweak such internal variables, indicated by a
+# trailing _.
+GTEST_SRCS_ = $(GTEST_DIR)/src/*.cc $(GTEST_DIR)/src/*.h $(GTEST_HEADERS)
+
+# Builds gtest.a
+# For simplicity and to avoid depending on Google Test's
+# implementation details, the dependencies specified below are
+# conservative and not optimized.  This is fine as Google Test
+# compiles fast and for ordinary users its source rarely changes.
+$(gtest-OBJS): $(GTEST_SRCS_)
+	echo Compiling $@
+	$(CXX) $(CPPFLAGS) -I$(GTEST_DIR) $(CXXFLAGS) -c -o $@ $(GTEST_DIR)/src/$(notdir $(basename $@)).cc
+
+$(LIB)/gtest.a: $(OBJ)/gtest-all.o
+	echo Building static library $@
+	-rm -f $@
+	$(AR) $(ARFLAGS) $@ $^