fix(test): misc09用例因依赖hosts文件而失败

【背景】
1.etc/hosts文件不存在，misc09依赖hosts文件而失败

【修改方案】
1.用例执行前检查是否存在这些配置文件，不存在就跳过该用例

re#I48IZ0

Change-Id: I193cb03770932c1f681cd726ceb383816aa2257a
Signed-off-by: Nlnlan <lanleinan@163.com>
Change-Id: I3fb7ca1ed5f8cc79a56cd1872f3b303ab325a7a9

testsuites/unittest/misc/full/misc_test_009.cpp

@@ -30,14 +30,29 @@
  */
 #include "It_test_misc.h"
 
-static UINT32 TestCase(VOID)
+STATIC UINT32 TestCase(VOID)
 {
-    long ret;
+    INT32 ret;
+    CHAR *hostsFileStream = "127.0.0.1 localhost\n192.168.1.3   hisilicon\n::1     localhost\n";
+    CHAR *pathList[] = {"/etc/hosts"};
+    CHAR *streamList[] = {hostsFileStream};
+    INT32 streamLen[] = {strlen(hostsFileStream)};
 
-    ret = gethostid();
-    ICUNIT_ASSERT_NOT_EQUAL(ret, -1, ret);
+    ret = PrepareFileEnv(pathList, streamList, streamLen, 1);
+    if (ret != 0) {
+        printf("error: need some env files, but prepare is not ok");
+        (VOID)RecoveryFileEnv(pathList, 1);
+        return -1;
+    }
 
+    ret = gethostid();
+    ICUNIT_GOTO_NOT_EQUAL(ret, -1, ret, ERROUT);
+    (VOID)RecoveryFileEnv(pathList, 1);
     return 0;
+
+ERROUT:
+    (VOID)RecoveryFileEnv(pathList, 1);
+    return -1;
 }
 
 VOID ItTestMisc009(VOID)