Some basic type conversion tests

git-svn-id: http://google-refine.googlecode.com/svn/trunk@2456 7d457c2a-affb-35e4-300a-418c747d4874

main/tests/server/src/com/google/refine/tests/expr/functions/strings/ToFromConversionTests.java

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+/*
+
+Copyright 2012, Thomas F. Morris
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+ * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"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 COPYRIGHT
+OWNER OR CONTRIBUTORS 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.
+
+ */
+
+package com.google.refine.tests.expr.functions.strings;
+
+import java.util.GregorianCalendar;
+import java.util.Properties;
+
+import org.slf4j.LoggerFactory;
+import org.testng.Assert;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.BeforeTest;
+import org.testng.annotations.Test;
+
+import com.google.refine.expr.EvalError;
+import com.google.refine.grel.ControlFunctionRegistry;
+import com.google.refine.grel.Function;
+import com.google.refine.tests.RefineTest;
+
+
+/**
+ * Tests for string up/low/title case functions.  
+ * (A very brief start so far)
+ * 
+ * @author Tom Morris <tfmorris@gmail.com>
+ */
+public class ToFromConversionTests extends RefineTest {
+
+    private static final double EPSILON = 0.0001;
+    static Properties bindings;
+
+    @Override
+    @BeforeTest
+    public void init() {
+        logger = LoggerFactory.getLogger(this.getClass());
+    }
+    
+    @BeforeMethod
+    public void SetUp() {
+        bindings = new Properties();
+    }
+
+    @AfterMethod
+    public void TearDown() {
+        bindings = null;
+    }
+    
+    /**
+     * Lookup a control function by name and invoke it with a variable number of args
+     */
+    private static Object invoke(String name,Object... args) {
+        // registry uses static initializer, so no need to set it up
+        Function function = ControlFunctionRegistry.getFunction(name);
+        if (function == null) {
+            throw new IllegalArgumentException("Unknown function "+name);
+        }
+        if (args == null) {
+            return function.call(bindings,new Object[0]);
+        } else {
+            return function.call(bindings,args);
+        }
+    }
+    
+    @Test
+    public void testFromError() {        
+        Assert.assertTrue(invoke("fromError") instanceof EvalError);
+        Assert.assertTrue(invoke("fromError", (Object)null) instanceof EvalError);
+        Assert.assertTrue(invoke("fromError", "string") instanceof EvalError);
+        Assert.assertEquals(invoke("fromError", new EvalError("message")),"message");
+    }
+    
+    @Test
+    public void testToNumber() {
+//        Assert.assertTrue(invoke("toNumber") instanceof EvalError);
+        Assert.assertNull(invoke("toNumber"));
+//        Assert.assertTrue(invoke("toNumber", (Object) null) instanceof EvalError);
+        Assert.assertNull(invoke("toNumber", (Object) null));
+        Assert.assertTrue(invoke("toNumber", "string") instanceof EvalError);
+        Assert.assertEquals(invoke("toNumber", "0.0"), 0.0);
+        Assert.assertTrue(Math.abs((Double) invoke("toNumber", "123.456") - 123.456) < EPSILON);
+        Assert.assertTrue(Math.abs((Double) invoke("toNumber", "001.234") - 1.234) < EPSILON);
+        Assert.assertTrue(Math.abs((Double) invoke("toNumber", "1e2") - 100.0) < EPSILON);
+        Assert.assertTrue(Math.abs((Double) invoke("toNumber", Double.parseDouble("100.0")) - 100.0) < EPSILON);
+    }
+
+    @Test
+    public void testToString() {
+//      Assert.assertTrue(invoke("toString") instanceof EvalError);
+      Assert.assertNull(invoke("toString"));
+//      Assert.assertTrue(invoke("toString", (Object) null) instanceof EvalError);
+      Assert.assertNull(invoke("toString", (Object) null));
+      Assert.assertEquals(invoke("toString", Double.valueOf(100.0)),"100.0");
+      // Calendar
+      // Date
+      // Date&Calendar with 2nd parameter with format
+    }
+    
+    @Test
+    public void testToDate() {
+//      Assert.assertTrue(invoke("toDate") instanceof EvalError);
+      Assert.assertNull(invoke("toDate"));
+      Assert.assertTrue(invoke("toDate", (Object) null) instanceof EvalError);
+      Assert.assertTrue(invoke("toDate", 1.0) instanceof EvalError);
+      Assert.assertTrue(invoke("toDate", "2012-03-01") instanceof GregorianCalendar);
+//      Assert.assertEquals(invoke("toDate", "2012-03-01"),new GregorianCalendar(2012,3,1));
+        // Date
+        // Calendar
+        // String
+    }
+}