diff --git a/react-native-file-selector/demo/file_selectorDemo.tsx b/react-native-file-selector/demo/file_selectorDemo.tsx
new file mode 100644
index 00000000..e58ce44e
--- /dev/null
+++ b/react-native-file-selector/demo/file_selectorDemo.tsx
@@ -0,0 +1,104 @@
+import { Button, SafeAreaView } from 'react-native';
+import FileSelector from 'react-native-file-selector';
+import { Tester, TestSuite, TestCase } from '@rnoh/testerino';
+
+const App=()=>{
+  return (<SafeAreaView>
+    <Tester>
+      <TestSuite name="test file selector">
+        <TestCase itShould="specify onDone"
+          assert={({expect, state})=>{
+            expect(state).to.be.true
+          }}
+          initialState={false}
+          tags={['C_API']}
+          arrange={
+            ({setState})=>{
+              return (<Button title="click"
+                onPress={
+                  ()=>{
+                    FileSelector.Show({onDone:(path)=>{setState(true); alert('path = ' + path);}});
+                  }
+                }
+              />)
+            }
+          }
+        >    
+        </TestCase>
+      </TestSuite>
+    </Tester>
+    <Tester>
+      <TestSuite name="test file selector">
+        <TestCase itShould="specify onCancel"
+          assert={({expect, state})=>{
+            expect(state).to.be.true
+          }}
+          initialState={false}
+          tags={['C_API']}
+          arrange={
+            ({setState})=>{
+              return (<Button title="click"
+                onPress={
+                  ()=>{
+                    FileSelector.Show({onCancel:()=>{setState(true); alert('cancelled');}});
+                  }
+                }
+              />)
+            }
+          }
+        >    
+        </TestCase>
+      </TestSuite>
+    </Tester>
+    <Tester>
+      <TestSuite name="test file selector">
+        <TestCase itShould="specify filter"
+          assert={({expect, state})=>{
+            expect(state).to.be.true
+          }}
+          initialState={false}
+          tags={['C_API']}
+          arrange={
+            ({setState})=>{
+              return (<Button title="click"
+                onPress={
+                  ()=>{
+                    FileSelector.Show({filter:".mp4,.jpeg", onDone:(path)=>{setState(true);}});
+                  }
+                }
+              />)
+            }
+          }
+        >    
+        </TestCase>
+      </TestSuite>
+    </Tester>
+    <Tester>
+      <TestSuite name="test file selector">
+        <TestCase itShould="specify path"
+          assert={({expect, state})=>{
+            expect(state).to.be.true
+          }}
+          initialState={false}
+          tags={['C_API']}
+          arrange={
+            ({setState})=>{
+              return (<Button title="click"
+                onPress={
+                  ()=>{
+                    FileSelector.Show({path: '/storage/Users/currentUser/Documents',
+                      onDone: (path)=>{setState(true);}
+                    });
+                  }
+                }
+              />)
+            }
+          }
+        >    
+        </TestCase>
+      </TestSuite>
+    </Tester>
+  </SafeAreaView>);
+};
+
+export default App;
\ No newline at end of file
diff --git a/react-native-file-selector/test/file_selectorTest.tsx b/react-native-file-selector/test/file_selectorTest.tsx
new file mode 100644
index 00000000..e58ce44e
--- /dev/null
+++ b/react-native-file-selector/test/file_selectorTest.tsx
@@ -0,0 +1,104 @@
+import { Button, SafeAreaView } from 'react-native';
+import FileSelector from 'react-native-file-selector';
+import { Tester, TestSuite, TestCase } from '@rnoh/testerino';
+
+const App=()=>{
+  return (<SafeAreaView>
+    <Tester>
+      <TestSuite name="test file selector">
+        <TestCase itShould="specify onDone"
+          assert={({expect, state})=>{
+            expect(state).to.be.true
+          }}
+          initialState={false}
+          tags={['C_API']}
+          arrange={
+            ({setState})=>{
+              return (<Button title="click"
+                onPress={
+                  ()=>{
+                    FileSelector.Show({onDone:(path)=>{setState(true); alert('path = ' + path);}});
+                  }
+                }
+              />)
+            }
+          }
+        >    
+        </TestCase>
+      </TestSuite>
+    </Tester>
+    <Tester>
+      <TestSuite name="test file selector">
+        <TestCase itShould="specify onCancel"
+          assert={({expect, state})=>{
+            expect(state).to.be.true
+          }}
+          initialState={false}
+          tags={['C_API']}
+          arrange={
+            ({setState})=>{
+              return (<Button title="click"
+                onPress={
+                  ()=>{
+                    FileSelector.Show({onCancel:()=>{setState(true); alert('cancelled');}});
+                  }
+                }
+              />)
+            }
+          }
+        >    
+        </TestCase>
+      </TestSuite>
+    </Tester>
+    <Tester>
+      <TestSuite name="test file selector">
+        <TestCase itShould="specify filter"
+          assert={({expect, state})=>{
+            expect(state).to.be.true
+          }}
+          initialState={false}
+          tags={['C_API']}
+          arrange={
+            ({setState})=>{
+              return (<Button title="click"
+                onPress={
+                  ()=>{
+                    FileSelector.Show({filter:".mp4,.jpeg", onDone:(path)=>{setState(true);}});
+                  }
+                }
+              />)
+            }
+          }
+        >    
+        </TestCase>
+      </TestSuite>
+    </Tester>
+    <Tester>
+      <TestSuite name="test file selector">
+        <TestCase itShould="specify path"
+          assert={({expect, state})=>{
+            expect(state).to.be.true
+          }}
+          initialState={false}
+          tags={['C_API']}
+          arrange={
+            ({setState})=>{
+              return (<Button title="click"
+                onPress={
+                  ()=>{
+                    FileSelector.Show({path: '/storage/Users/currentUser/Documents',
+                      onDone: (path)=>{setState(true);}
+                    });
+                  }
+                }
+              />)
+            }
+          }
+        >    
+        </TestCase>
+      </TestSuite>
+    </Tester>
+  </SafeAreaView>);
+};
+
+export default App;
\ No newline at end of file