/*
 * Copyright 2014 The Closure Compiler Authors.
 *
 * 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.javascript.jscomp.lint;

import com.google.javascript.jscomp.CheckLevel;
import com.google.javascript.jscomp.Compiler;
import com.google.javascript.jscomp.CompilerOptions;
import com.google.javascript.jscomp.CompilerPass;
import com.google.javascript.jscomp.CompilerTestCase;
import com.google.javascript.jscomp.DiagnosticGroups;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Test case for {@link CheckInterfaces}. */
@RunWith(JUnit4.class)
public final class CheckInterfacesTest extends CompilerTestCase {
  @Override
  protected CompilerPass getProcessor(Compiler compiler) {
    return new CheckInterfaces(compiler);
  }

  @Override
  protected CompilerOptions getOptions(CompilerOptions options) {
    super.getOptions(options);
    options.setWarningLevel(DiagnosticGroups.LINT_CHECKS, CheckLevel.WARNING);
    return options;
  }

  @Test
  public void testInterfaceArgs() {
    testSame("/** @interface */ function A(x) {}",
        CheckInterfaces.INTERFACE_SHOULD_NOT_TAKE_ARGS);

    testSame(
        lines(
            "var ns = {};\n", "/** @interface */\n", "ns.SomeInterface = function(x) {};"),
        CheckInterfaces.INTERFACE_SHOULD_NOT_TAKE_ARGS);
  }

  @Test
  public void testInterfaceArgs_withES6Modules() {
    testSame(
        "export /** @interface */ function A(x) {}",
        CheckInterfaces.INTERFACE_SHOULD_NOT_TAKE_ARGS);
  }

  @Test
  public void testInterfaceNotEmpty() {
    testSame("/** @interface */ function A() { this.foo; }",
        CheckInterfaces.INTERFACE_FUNCTION_NOT_EMPTY);

    testSame(
        lines(
            "var ns = {};\n",
            "/** @interface */\n",
            "ns.SomeInterface = function() { this.foo; };"),
        CheckInterfaces.INTERFACE_FUNCTION_NOT_EMPTY);
  }

  @Test
  public void testInterfaceNotEmpty_withES6Modules() {
    testSame(
        "export /** @interface */ function A() { this.foo; }",
        CheckInterfaces.INTERFACE_FUNCTION_NOT_EMPTY);
  }

  @Test
  public void testRecordWithFieldDeclarations() {
    testSame(
        lines(
            "/** @record */",
            "function R() {",
            "  /** @type {string} */",
            "  this.foo;",
            "",
            "  /** @type {number} */",
            "  this.bar;",
            "}"));
  }

  @Test
  public void testRecordWithOtherContents() {
    testSame(
        lines(
            "/** @record */",
            "function R() {",
            "  /** @type {string} */",
            "  this.foo = '';",
            "}"));
  }
}