diff --git a/tests/dummyext/CMakeLists.txt b/tests/dummyext/CMakeLists.txt
index 0faab34..21f8498 100644
--- a/tests/dummyext/CMakeLists.txt
+++ b/tests/dummyext/CMakeLists.txt
@@ -11,7 +11,9 @@ set(DUMMYEXT_SRCS
     InterfaceTestcases.h
     InterfaceTestcases.cpp
     NamespaceTestcases.h
-    NamespaceTestcases.cpp)
+    NamespaceTestcases.cpp
+    ConstantTestcases.h
+    ConstantTestcases.cpp)
 
 add_library(dummyext MODULE 
     ${DUMMYEXT_SRCS})
diff --git a/tests/dummyext/ConstantTestcases.cpp b/tests/dummyext/ConstantTestcases.cpp
new file mode 100644
index 0000000..e50db3f
--- /dev/null
+++ b/tests/dummyext/ConstantTestcases.cpp
@@ -0,0 +1,40 @@
+// @copyright 2017-2018 zzu_softboy <zzu_softboy@163.com>
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Created by softboy on 2017/11/02.
+
+#include "ConstantTestcases.h"
+
+namespace dummyext 
+{
+
+using zapi::lang::Constant;
+using zapi::lang::Namespace;
+
+void register_constant_testcases(Extension &extension)
+{
+   extension.registerConstant(Constant("MY_CONST", 12333));
+   extension.registerConstant(Constant("PI", 3.14));
+   Constant nameConst("ZAPI_NAME", "zapi");
+   extension.registerConstant(nameConst);
+   extension.registerConstant(Constant("ZAPI_VERSION", "v0.0.1"));
+   extension.registerConstant(Constant("QIHOO", "beijing qihoo"));
+   // register constant in namespace
+   Namespace *zapi = extension.findNamespace("zapi");
+   Namespace *io = zapi->findNamespace("io");
+   io->registerConstant(Constant("IO_TYPE", "ASYNC"));
+   io->registerConstant(Constant("NATIVE_STREAM", true));
+   zapi->registerConstant(Constant("SYS_VERSION", "0.1.1-alpha"));
+}
+
+} // dummyext
diff --git a/tests/dummyext/ConstantTestcases.h b/tests/dummyext/ConstantTestcases.h
new file mode 100644
index 0000000..3124f58
--- /dev/null
+++ b/tests/dummyext/ConstantTestcases.h
@@ -0,0 +1,30 @@
+// @copyright 2017-2018 zzu_softboy <zzu_softboy@163.com>
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Created by softboy on 2017/11/02.
+
+#ifndef ZAPI_TEST_DUMMYEXT_CONSTANT_TESTCASES_H
+#define ZAPI_TEST_DUMMYEXT_CONSTANT_TESTCASES_H
+
+#include "zapi/ZendApi.h"
+
+namespace dummyext
+{
+
+using zapi::lang::Extension;
+
+ZAPI_DECL_EXPORT void register_constant_testcases(Extension &extension);
+
+} // dummyext
+
+#endif // ZAPI_TEST_DUMMYEXT_CONSTANT_TESTCASES_H
diff --git a/tests/dummyext/Entry.cpp b/tests/dummyext/Entry.cpp
index 0561081..16241d8 100644
--- a/tests/dummyext/Entry.cpp
+++ b/tests/dummyext/Entry.cpp
@@ -20,6 +20,7 @@
 #include "FunctionTestcases.h"
 #include "ClassTestcases.h"
 #include "InterfaceTestcases.h"
+#include "ConstantTestcases.h"
 
 using zapi::lang::Extension;
 
@@ -31,6 +32,7 @@ ZAPI_DECL_EXPORT void *get_module()
    dummyext::register_ini_testcases(extension);
    dummyext::register_cyclehandler_testcases(extension);
    dummyext::register_namespace_testcases(extension);
+   dummyext::register_constant_testcases(extension);
    dummyext::register_interface_testcases(extension);
    dummyext::register_function_testcases(extension);
    dummyext::register_class_testcases(extension);
diff --git a/tests/dummyext/NamespaceTestcases.cpp b/tests/dummyext/NamespaceTestcases.cpp
index 0e2e941..f98a14a 100644
--- a/tests/dummyext/NamespaceTestcases.cpp
+++ b/tests/dummyext/NamespaceTestcases.cpp
@@ -18,9 +18,14 @@
 namespace dummyext 
 {
 
+using zapi::lang::Namespace;
+
 void register_namespace_testcases(Extension &extension)
 {
-   
+   Namespace zapi("zapi");
+   Namespace io("io");
+   zapi.registerNamespace(io);
+   extension.registerNamespace(zapi);
 }
 
 } // dummyext
diff --git a/tests/lang/const/ConstantExistTest.phpt b/tests/lang/const/ConstantExistTest.phpt
index c2dccd3..78021a7 100644
--- a/tests/lang/const/ConstantExistTest.phpt
+++ b/tests/lang/const/ConstantExistTest.phpt
@@ -1,37 +1,31 @@
---TEST--
-Contant register test
---FILE--
 <?php
 
-if(defined("MY_CONST"))
+if(!defined("MY_CONST"))
 {
-   echo "MY_CONST defined\n";
+   goto error;
 }
 
-if(defined("PI"))
+if(!defined("PI"))
 {
-   echo "PI defined\n";
+   goto error;
 }
 
-if(defined("ZAPI_NAME"))
+if(!defined("ZAPI_NAME"))
 {
-   echo "ZAPI_NAME defined\n";
+   goto error;
 }
 
-if(defined("ZAPI_VERSION"))
+if(!defined("ZAPI_VERSION"))
 {
-   echo "ZAPI_NAME defined\n";
+   goto error;
 }
 
-if(defined("QIHOO"))
+if(!defined("QIHOO"))
 {
-   echo "QIHOO defined\n";
+   goto error;
 }
 
-?>
---EXPECT--
-MY_CONST defined
-PI defined
-ZAPI_NAME defined
-ZAPI_NAME defined
-QIHOO defined
+success:
+exit(0);
+error:
+exit(1);
diff --git a/tests/lang/const/ConstantNsTest.phpt b/tests/lang/const/ConstantNsTest.phpt
index 877f000..e030a7c 100644
--- a/tests/lang/const/ConstantNsTest.phpt
+++ b/tests/lang/const/ConstantNsTest.phpt
@@ -1,25 +1,21 @@
---TEST--
-Contant namespace exist test
---FILE--
 <?php
 
-if(defined("\zapi\SYS_VERSION"))
+if(!defined("\zapi\SYS_VERSION"))
 {
-   echo "\zapi\SYS_VERSION defined\n";
+   goto error;
 }
 
-if(defined("\zapi\io\IO_TYPE"))
+if(!defined("\zapi\io\IO_TYPE"))
 {
-   echo "\zapi\io\IO_TYPE defined\n";
+   goto error;
 }
 
-if(defined("\zapi\io\NATIVE_STREAM"))
+if(!defined("\zapi\io\NATIVE_STREAM"))
 {
-   echo "\zapi\io\NATIVE_STREAM defined\n";
+   goto error;
 }
 
-?>
---EXPECT--
-\zapi\SYS_VERSION defined
-\zapi\io\IO_TYPE defined
-\zapi\io\NATIVE_STREAM defined
+success:
+exit(0);
+error:
+exit(1);
diff --git a/tests/lang/const/ConstantTypeTest.phpt b/tests/lang/const/ConstantTypeTest.phpt
index 52b0a4b..64f7bd1 100644
--- a/tests/lang/const/ConstantTypeTest.phpt
+++ b/tests/lang/const/ConstantTypeTest.phpt
@@ -1,71 +1,46 @@
---TEST--
-Contant type test
---FILE--
 <?php
 
-if(defined("MY_CONST"))
+if(!defined("MY_CONST") || !is_int(MY_CONST))
 {
-   if (is_int(MY_CONST)) {
-      echo "MY_CONST is int\n";
-   }
+   goto error;
 }
 
-if(defined("PI"))
+if(!defined("PI") || !is_double(PI))
 {
-   if (is_double(PI)) {
-      echo "PI is double\n";
-   }
+   goto error;
 }
 
-if(defined("ZAPI_NAME"))
+if(!defined("ZAPI_NAME") || !is_string(ZAPI_NAME))
 {
-   if (is_string(ZAPI_NAME)) {
-      echo "ZAPI_NAME is string\n";
-   }
+   goto error;
 }
 
-if(defined("ZAPI_VERSION"))
+if(!defined("ZAPI_VERSION") || !is_string(ZAPI_VERSION))
 {
-   if (is_string(ZAPI_VERSION)) {
-      echo "ZAPI_VERSION is string\n";
-   }
+   goto error;
 }
 
-if(defined("QIHOO"))
+if(!defined("QIHOO") || !is_string(QIHOO))
 {
-   if (is_string(QIHOO)) {
-      echo "QIHOO is string\n";
-   }
+   goto error;
 }
 
-if(defined("\zapi\SYS_VERSION"))
+if(!defined("\zapi\SYS_VERSION") || !is_string(\zapi\SYS_VERSION))
 {
-   if (is_string(\zapi\SYS_VERSION)) {
-      echo "\zapi\SYS_VERSION is string\n";
-   }
+   goto error;
 }
 
-if(defined("\zapi\io\IO_TYPE"))
+if(!defined("\zapi\io\IO_TYPE") || !is_string(\zapi\io\IO_TYPE))
 {
-   if (is_string(\zapi\io\IO_TYPE)) {
-      echo "\zapi\io\IO_TYPE is string\n";
-   }
+   goto error;
 }
 
-if(defined("\zapi\io\NATIVE_STREAM"))
+if(!defined("\zapi\io\NATIVE_STREAM") || !is_bool(\zapi\io\NATIVE_STREAM))
 {
-   if (is_bool(\zapi\io\NATIVE_STREAM)) {
-      echo "\zapi\io\NATIVE_STREAM is bool\n";
-   }
+   goto error;
 }
 
-?>
---EXPECT--
-MY_CONST is int
-PI is double
-ZAPI_NAME is string
-ZAPI_VERSION is string
-QIHOO is string
-\zapi\SYS_VERSION is string
-\zapi\io\IO_TYPE is string
-\zapi\io\NATIVE_STREAM is bool
+success:
+exit(0);
+error:
+exit(1);