参考资料

单元测试

C语言可以使用minunit.h来编写单元测试代码。在工程目录下创建一个 test 目录,然后在里头创建文件名以 “test” 开头的测试代码。例如:

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#include "../lib/minunit.h"
#include "../lib/numeric_util.h" // 要测试的函数的所在位置
char *test_fibonacci_naive(void)
{
int array[20] = {0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181};
int i;
int fib;
int err = 0;
for (i = 0; i < 10; i++) {
fib = fibonacci_naive(i);
if (array[i] != fib){
err = 1;
goto error;
}
}
error:
mu_assert(err == 0, "test fibonacci naive failed.");
return NULL;
}
char *all_tests() {
mu_suite_start();
mu_run_test(test_fibonacci_naive);
return NULL;
}
RUN_TESTS(all_tests);

要启用测试,还需要借助一个测试脚本 runtest.sh。将它放在测试代码的同个目录下,然后可以在项目的 Makefile 中写命令调用它。

一个自动化编译的 Makefile

以下 Makefile 文件会自动查找 src 下面对的所有源文件并编译。

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CFLAGS=-g -O2 -Wall -Wextra -Isrc -rdynamic -DNDEBUG $(OPTFLAGS)
LIBS=-ldl $(OPTLIBS)
PREFIX?=/usr/local
SOURCES=$(wildcard src/**/*.c src/*.c)
OBJECTS=$(patsubst %.c,%.o,$(SOURCES))
TEST_SRC=$(wildcard tests/*_tests.c)
TESTS=$(patsubst %.c,%,$(TEST_SRC))
TARGET=build/libYOUR_LIBRARY.a
SO_TARGET=$(patsubst %.a,%.so,$(TARGET))
# The Target Build
all: $(TARGET) $(SO_TARGET) tests
dev: CFLAGS=-g -Wall -Isrc -Wall -Wextra $(OPTFLAGS)
dev: all
$(TARGET): CFLAGS += -fPIC
$(TARGET): build $(OBJECTS)
ar rcs $@ $(OBJECTS)
ranlib $@
$(SO_TARGET): $(TARGET) $(OBJECTS)
$(CC) -shared -o $@ $(OBJECTS)
build:
@mkdir -p build
@mkdir -p bin
# The Unit Tests
.PHONY: tests
tests: CFLAGS += $(TARGET)
tests: $(TESTS)
sh ./tests/runtests.sh
valgrind:
VALGRIND="valgrind --log-file=/tmp/valgrind-%p.log" $(MAKE)
# The Cleaner
clean:
rm -rf build $(OBJECTS) $(TESTS)
rm -f tests/tests.log
find . -name "*.gc*" -exec rm {} \;
rm -rf `find . -name "*.dSYM" -print`
# The Install
install: all
install -d $(DESTDIR)/$(PREFIX)/lib/
install $(TARGET) $(DESTDIR)/$(PREFIX)/lib/
# The Checker
BADFUNCS='[^_.>a-zA-Z0-9](str(n?cpy|n?cat|xfrm|n?dup|str|pbrk|tok|_)|stpn?cpy|a?sn?printf|byte_)'
check:
@echo Files with potentially dangerous functions.
@egrep $(BADFUNCS) $(SOURCES) || true

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