Add a test for System.currentTimeMillis()

test/de/inetsoftware/jwebassembly/runtime/DynamicValues.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2019 Volker Berlin (i-net software)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.inetsoftware.jwebassembly.runtime;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeFalse;
+
+import java.util.Collection;
+
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+import de.inetsoftware.jwebassembly.ScriptEngine;
+import de.inetsoftware.jwebassembly.WasmRule;
+import de.inetsoftware.jwebassembly.api.annotation.Export;
+
+/**
+ * Run some tests which not return static/fix values likes times or random value and which are difficult to compare.
+ * 
+ * @author Volker Berlin
+ *
+ */
+@RunWith( Parameterized.class )
+public class DynamicValues {
+
+    @ClassRule
+    public static WasmRule rule = new WasmRule( TestClass.class );
+
+    private final ScriptEngine script;
+
+    public DynamicValues( ScriptEngine script ) {
+        this.script = script;
+    }
+
+    @Parameters( name = "{0}" )
+    public static Collection<ScriptEngine[]> data() {
+        return ScriptEngine.testParams();
+    }
+
+    @Test
+    public void currentTimeMillis() {
+        assumeFalse( script == ScriptEngine.SpiderMonkey || script == ScriptEngine.SpiderMonkeyWat );
+        long before = System.currentTimeMillis(); 
+        String result = rule.evalWasm( script, "currentTimeMillis" );
+        long after = System.currentTimeMillis(); 
+        long val = Long.parseLong( result );
+        assertTrue( before + "<=" + val + "<=" + after, before <= val && val <= after );
+    }
+
+    static class TestClass {
+
+        @Export
+        static long currentTimeMillis() {
+            return System.currentTimeMillis();
+        }
+    }
+}