/*
 * Copyright 2011 Google Inc.
 *
 * 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 com.google.template.soy.basicfunctions;

import static com.google.common.truth.Truth.assertThat;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Sets;
import com.google.template.soy.data.SoyList;
import com.google.template.soy.data.SoyValue;
import com.google.template.soy.data.SoyValueHelper;
import com.google.template.soy.data.SoyValueProvider;
import com.google.template.soy.jssrc.restricted.JsExpr;
import com.google.template.soy.pysrc.restricted.PyExpr;
import com.google.template.soy.pysrc.restricted.PyListExpr;

import junit.framework.TestCase;

import java.util.Set;


/**
 * Unit tests for KeysFunction.
 *
 */
public class KeysFunctionTest extends TestCase {


  private static final SoyValueHelper VALUE_HELPER = SoyValueHelper.UNCUSTOMIZED_INSTANCE;


  public void testComputeForJava() {
    KeysFunction keysFunction = new KeysFunction();

    SoyValue map = VALUE_HELPER.newEasyDict(
        "boo", "bar", "foo", 2, "goo", VALUE_HELPER.newEasyDict("moo", 4));
    SoyValue result = keysFunction.computeForJava(ImmutableList.of(map));

    assertTrue(result instanceof SoyList);
    SoyList resultAsList = (SoyList) result;
    assertEquals(3, resultAsList.length());

    Set<String> resultItems = Sets.newHashSet();
    for (SoyValueProvider itemProvider : resultAsList.asJavaList()) {
      resultItems.add(itemProvider.resolve().stringValue());
    }
    assertEquals(Sets.newHashSet("boo", "foo", "goo"), resultItems);
  }

  public void testComputeForJsSrc() {
    KeysFunction keysFunction = new KeysFunction();
    JsExpr expr = new JsExpr("JS_CODE", Integer.MAX_VALUE);
    assertEquals(
        new JsExpr("soy.$$getMapKeys(JS_CODE)", Integer.MAX_VALUE),
        keysFunction.computeForJsSrc(ImmutableList.of(expr)));
  }

  public void testComputeForPySrc() {
    KeysFunction keysFunction = new KeysFunction();
    PyExpr dict = new PyExpr("dictionary", Integer.MAX_VALUE);
    assertThat(keysFunction.computeForPySrc(ImmutableList.of(dict)))
        .isEqualTo(new PyListExpr("(dictionary).keys()", Integer.MAX_VALUE));
  }
}