tests: internal: gelf: add test case for msec

It detects fluent#3727

Signed-off-by: Takahiro Yamashita <[email protected]>

tests/internal/gelf.c

@@ -50,7 +50,52 @@ void test_gelf_pack()
     msgpack_sbuffer_destroy(&mp_sbuf);
 }
 
+#define EXPECTED_OUT_MSEC \
+    "{\"version\":\"1.1\", \"short_message\":\"true, 2019, str\", \"_t2\":\"false\", \"timestamp\":337647600.012}"
+
+/* https://github.com/fluent/fluent-bit/issues/3727 */
+void test_gelf_pack_msec()
+{
+    msgpack_sbuffer mp_sbuf;
+    msgpack_packer mp_pck;
+    struct flb_time ts;
+    struct flb_gelf_fields fields = {0};
+    flb_sds_t out;
+
+    /* Pack sample msgpack */
+    msgpack_sbuffer_init(&mp_sbuf);
+    msgpack_packer_init(&mp_pck, &mp_sbuf, msgpack_sbuffer_write);
+
+
+    ts.tm.tv_sec =  337647600;
+    ts.tm.tv_nsec =  12341111; /* 12.34msec */
+
+    msgpack_pack_map(&mp_pck, 2);
+    msgpack_pack_str(&mp_pck, 2);
+    msgpack_pack_str_body(&mp_pck, "t1", 2);
+    msgpack_pack_array(&mp_pck, 3);
+    msgpack_pack_true(&mp_pck);
+    msgpack_pack_uint64(&mp_pck, 2019);
+    msgpack_pack_str(&mp_pck, 3);
+    msgpack_pack_str_body(&mp_pck, "str", 3);
+    msgpack_pack_str(&mp_pck, 2);
+    msgpack_pack_str_body(&mp_pck, "t2", 2);
+    msgpack_pack_false(&mp_pck);
+
+    fields.short_message_key = flb_sds_create("t1");
+    out = flb_msgpack_raw_to_gelf(mp_sbuf.data, mp_sbuf.size, &ts, &fields);
+    TEST_CHECK(out != NULL);
+
+    if(!TEST_CHECK(strcmp(out, EXPECTED_OUT_MSEC) == 0)) {
+        TEST_MSG("out=%s", out);
+    }
+    flb_sds_destroy(out);
+    flb_sds_destroy(fields.short_message_key);
+    msgpack_sbuffer_destroy(&mp_sbuf);
+}
+
 TEST_LIST = {
-    {"gelf_pack", test_gelf_pack},
+    {"gelf_pack",      test_gelf_pack},
+    {"gelf_pack_msec", test_gelf_pack_msec},
     { 0 }
 };