add tests for termination

src/test/java/com/github/nkzawa/engineio/client/ExecutionTest.java

@@ -0,0 +1,46 @@
+package com.github.nkzawa.engineio.client;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+@RunWith(JUnit4.class)
+public class ExecutionTest extends Connection {
+
+    final static int TIMEOUT = 30 * 1000;
+
+    @Test(timeout = TIMEOUT)
+    public void execConnection() throws InterruptedException, IOException {
+        exec("com.github.nkzawa.engineio.client.executions.Connection");
+    }
+
+    @Test(timeout = TIMEOUT)
+    public void execConnectionFailure() throws InterruptedException, IOException {
+        exec("com.github.nkzawa.engineio.client.executions.ConnectionFailure");
+    }
+
+    @Test(timeout = TIMEOUT)
+    public void execImmediateClose() throws InterruptedException, IOException {
+        exec("com.github.nkzawa.engineio.client.executions.ImmediateClose");
+    }
+
+    private void exec(String mainClass) throws InterruptedException, IOException {
+        Process process = Runtime.getRuntime().exec(String.format("mvn --quiet exec:java" +
+                " -Dexec.mainClass=%s -Dexec.classpathScope=test", mainClass), createEnv());
+        BufferedReader input = new BufferedReader(
+                new InputStreamReader(process.getInputStream()));
+        String line;
+        while ((line = input.readLine()) != null) {
+            System.out.println("EXEC OUT: " + line);
+        }
+        process.waitFor();
+        assertThat(process.exitValue(), is(0));
+    }
+}