28   std::string s("hello");  in TEST()  local
30   EXPECT_FALSE(read_file("/proc/does-not-exist", &s));  in TEST()
32   EXPECT_EQ("", s); // s was cleared.  in TEST()
36     std::string s("hello");  in TEST()  local
39     EXPECT_TRUE(write_file(tf.path, s)) << strerror(errno);  in TEST()
41     EXPECT_FALSE(read_file(tf.path, &s)) << strerror(errno);  in TEST()
42     EXPECT_EQ("", s);  // s was cleared.  in TEST()
46     std::string s("hello");  in TEST()  local
49     EXPECT_TRUE(write_file(tf.path, s.c_str())) << strerror(errno);  in TEST()
51     EXPECT_FALSE(read_file(tf.path, &s)) << strerror(errno);  in TEST()
52     EXPECT_EQ("", s);  // s was cleared.  in TEST()
56     std::string s("hello");  in TEST()  local
59     EXPECT_FALSE(read_file("/charger", &s));  in TEST()
61     EXPECT_EQ("", s);  // s was cleared.  in TEST()
65   std::string s("hello");  in TEST()  local
66   EXPECT_TRUE(read_file("/proc/version", &s));  in TEST()
67   EXPECT_GT(s.length(), 6U);  in TEST()
68   EXPECT_EQ('\n', s[s.length() - 1]);  in TEST()
69   s[5] = 0;  in TEST()
70   EXPECT_STREQ("Linux", s.c_str());  in TEST()
91     std::string s("hello");  in TEST()  local
95     EXPECT_TRUE(write_file(path, s));  in TEST()
97     EXPECT_EQ(s, s2);  in TEST()