<!DOCTYPE html>
<!--
Copyright (C) 2016 The Android Open Source Project

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.
-->

<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<title>gr-syntax-layer</title>

<script src="../../../bower_components/webcomponentsjs/webcomponents.min.js"></script>
<script src="../../../bower_components/web-component-tester/browser.js"></script>

<link rel="import" href="../../shared/gr-rest-api-interface/mock-diff-response_test.html">
<link rel="import" href="gr-syntax-layer.html">

<test-fixture id="basic">
  <template>
    <gr-syntax-layer></gr-syntax-layer>
  </template>
</test-fixture>

<script>
  suite('gr-syntax-layer tests', function() {
    var sandbox;
    var diff;
    var element;

    function getMockHLJS() {
      var html = '<span class="gr-diff gr-syntax gr-syntax-string">' +
          'ipsum</span>';
      return {
        configure: function() {},
        highlight: function(lang, line, ignore, state) {
          return {
            value: line.replace(/ipsum/, html),
            top: state === undefined ? 1 : state + 1,
          };
        },
      };
    }

    setup(function() {
      sandbox = sinon.sandbox.create();
      element = fixture('basic');
      var mock = document.createElement('mock-diff-response');
      diff = mock.diffResponse;
      element.diff = diff;
    });

    teardown(function() {
      sandbox.restore();
    });

    test('annotate without range does nothing', function() {
      var annotationSpy = sandbox.spy(GrAnnotation, 'annotateElement');
      var el = document.createElement('div');
      el.textContent = 'Etiam dui, blandit wisi.';
      var line = new GrDiffLine(GrDiffLine.Type.REMOVE);
      line.beforeNumber = 12;

      element.annotate(el, line);

      assert.isFalse(annotationSpy.called);
    });

    test('annotate with range applies it', function() {
      var str = 'Etiam dui, blandit wisi.';
      var start = 6;
      var length = 3;
      var className = 'foobar';

      var annotationSpy = sandbox.spy(GrAnnotation, 'annotateElement');
      var el = document.createElement('div');
      el.textContent = str;
      var line = new GrDiffLine(GrDiffLine.Type.REMOVE);
      line.beforeNumber = 12;
      element._baseRanges[11] = [{
        start: start,
        length: length,
        className: className,
      }];

      element.annotate(el, line);

      assert.isTrue(annotationSpy.called);
      assert.equal(annotationSpy.lastCall.args[0], el);
      assert.equal(annotationSpy.lastCall.args[1], start);
      assert.equal(annotationSpy.lastCall.args[2], length);
      assert.equal(annotationSpy.lastCall.args[3], className);
      assert.isOk(el.querySelector('hl.' + className));
    });

    test('annotate with range but disabled does nothing', function() {
      var str = 'Etiam dui, blandit wisi.';
      var start = 6;
      var length = 3;
      var className = 'foobar';

      var annotationSpy = sandbox.spy(GrAnnotation, 'annotateElement');
      var el = document.createElement('div');
      el.textContent = str;
      var line = new GrDiffLine(GrDiffLine.Type.REMOVE);
      line.beforeNumber = 12;
      element._baseRanges[11] = [{
        start: start,
        length: length,
        className: className,
      }];
      element.enabled = false;

      element.annotate(el, line);

      assert.isFalse(annotationSpy.called);
    });

    test('process on empty diff does nothing', function(done) {
      element.diff = {
        meta_a: {content_type: 'application/json'},
        meta_b: {content_type: 'application/json'},
        content: [],
      };
      var processNextSpy = sandbox.spy(element, '_processNextLine');

      var processPromise = element.process();

      processPromise.then(function() {
        assert.isFalse(processNextSpy.called);
        assert.equal(element._baseRanges.length, 0);
        assert.equal(element._revisionRanges.length, 0);
        done();
      });
    });

    test('process for unsupported languages does nothing', function(done) {
      element.diff = {
        meta_a: {content_type: 'text/x+objective-cobol-plus-plus'},
        meta_b: {content_type: 'application/not-a-real-language'},
        content: [],
      };
      var processNextSpy = sandbox.spy(element, '_processNextLine');

      var processPromise = element.process();

      processPromise.then(function() {
        assert.isFalse(processNextSpy.called);
        assert.equal(element._baseRanges.length, 0);
        assert.equal(element._revisionRanges.length, 0);
        done();
      });
    });

    test('process while disabled does nothing', function(done) {
      var processNextSpy = sandbox.spy(element, '_processNextLine');
      element.enabled = false;
      var loadHLJSSpy = sandbox.spy(element, '_loadHLJS');

      var processPromise = element.process();

      processPromise.then(function() {
        assert.isFalse(processNextSpy.called);
        assert.equal(element._baseRanges.length, 0);
        assert.equal(element._revisionRanges.length, 0);
        assert.isFalse(loadHLJSSpy.called);
        done();
      });
    });

    test('process highlight ipsum', function(done) {
      element.diff.meta_a.content_type = 'application/json';
      element.diff.meta_b.content_type = 'application/json';

      var mockHLJS = getMockHLJS();
      var highlightSpy = sinon.spy(mockHLJS, 'highlight');
      sandbox.stub(element.$.libLoader, 'get',
          function() { return Promise.resolve(mockHLJS); });
      var processNextSpy = sandbox.spy(element, '_processNextLine');
      var processPromise = element.process();

      processPromise.then(function() {
        var linesA = diff.meta_a.lines;
        var linesB = diff.meta_b.lines;

        assert.isTrue(processNextSpy.called);
        assert.equal(element._baseRanges.length, linesA);
        assert.equal(element._revisionRanges.length, linesB);

        assert.equal(highlightSpy.callCount, linesA + linesB);

        // The first line of both sides have a range.
        [element._baseRanges[0], element._revisionRanges[0]]
            .forEach(function(range) {
              assert.equal(range.length, 1);
              assert.equal(range[0].className,
                  'gr-diff gr-syntax gr-syntax-string');
              assert.equal(range[0].start, 'lorem '.length);
              assert.equal(range[0].length, 'ipsum'.length);
            });

        // There are no ranges from ll.1-12 on the left and ll.1-11 on the
        // right.
        element._baseRanges.slice(1, 12)
            .concat(element._revisionRanges.slice(1, 11))
            .forEach(function(range) {
              assert.equal(range.length, 0);
            });

        // There should be another pair of ranges on l.13 for the left and
        // l.12 for the right.
        [element._baseRanges[13], element._revisionRanges[12]]
            .forEach(function(range) {
              assert.equal(range.length, 1);
              assert.equal(range[0].className,
                  'gr-diff gr-syntax gr-syntax-string');
              assert.equal(range[0].start, 32);
              assert.equal(range[0].length, 'ipsum'.length);
            });

        // The next group should have a similar instance on either side.

        var range = element._baseRanges[15];
        assert.equal(range.length, 1);
        assert.equal(range[0].className, 'gr-diff gr-syntax gr-syntax-string');
        assert.equal(range[0].start, 34);
        assert.equal(range[0].length, 'ipsum'.length);

        range = element._revisionRanges[14];
        assert.equal(range.length, 1);
        assert.equal(range[0].className, 'gr-diff gr-syntax gr-syntax-string');
        assert.equal(range[0].start, 35);
        assert.equal(range[0].length, 'ipsum'.length);

        done();
      });
    });

    test('_diffChanged calls cancel', function() {
      var cancelSpy = sandbox.spy(element, '_diffChanged');
      element.diff = {content: []};
      assert.isTrue(cancelSpy.called);
    });

    test('_rangesFromElement no ranges', function() {
      var elem = document.createElement('span');
      elem.textContent = 'Etiam dui, blandit wisi.';
      var offset = 100;

      var result = element._rangesFromElement(elem, offset);

      assert.equal(result.length, 0);
    });

    test('_rangesFromElement single range', function() {
      var str0 = 'Etiam ';
      var str1 = 'dui, blandit';
      var str2 = ' wisi.';
      var className = 'gr-diff gr-syntax gr-syntax-string';
      var offset = 100;

      var elem = document.createElement('span');
      elem.appendChild(document.createTextNode(str0));
      var span = document.createElement('span');
      span.textContent = str1;
      span.className = className;
      elem.appendChild(span);
      elem.appendChild(document.createTextNode(str2));

      var result = element._rangesFromElement(elem, offset);

      assert.equal(result.length, 1);
      assert.equal(result[0].start, str0.length + offset);
      assert.equal(result[0].length, str1.length);
      assert.equal(result[0].className, className);
    });

    test('_rangesFromElement non-whitelist', function() {
      var str0 = 'Etiam ';
      var str1 = 'dui, blandit';
      var str2 = ' wisi.';
      var className = 'not-in-the-whitelist';
      var offset = 100;

      var elem = document.createElement('span');
      elem.appendChild(document.createTextNode(str0));
      var span = document.createElement('span');
      span.textContent = str1;
      span.className = className;
      elem.appendChild(span);
      elem.appendChild(document.createTextNode(str2));

      var result = element._rangesFromElement(elem, offset);

      assert.equal(result.length, 0);
    });

    test('_rangesFromElement milti range', function() {
      var str0 = 'Etiam ';
      var str1 = 'dui,';
      var str2 = ' blandit';
      var str3 = ' wisi.';
      var className = 'gr-diff gr-syntax gr-syntax-string';
      var offset = 100;

      var elem = document.createElement('span');
      elem.appendChild(document.createTextNode(str0));
      var span = document.createElement('span');
      span.textContent = str1;
      span.className = className;
      elem.appendChild(span);
      elem.appendChild(document.createTextNode(str2));
      span = document.createElement('span');
      span.textContent = str3;
      span.className = className;
      elem.appendChild(span);

      var result = element._rangesFromElement(elem, offset);

      assert.equal(result.length, 2);

      assert.equal(result[0].start, str0.length + offset);
      assert.equal(result[0].length, str1.length);
      assert.equal(result[0].className, className);

      assert.equal(result[1].start,
          str0.length + str1.length + str2.length + offset);
      assert.equal(result[1].length, str3.length);
      assert.equal(result[1].className, className);
    });

    test('_rangesFromElement nested range', function() {
      var str0 = 'Etiam ';
      var str1 = 'dui,';
      var str2 = ' blandit';
      var str3 = ' wisi.';
      var className = 'gr-diff gr-syntax gr-syntax-string';
      var offset = 100;

      var elem = document.createElement('span');
      elem.appendChild(document.createTextNode(str0));
      var span1 = document.createElement('span');
      span1.textContent = str1;
      span1.className = className;
      elem.appendChild(span1);
      var span2 = document.createElement('span');
      span2.textContent = str2;
      span2.className = className;
      span1.appendChild(span2);
      elem.appendChild(document.createTextNode(str3));

      var result = element._rangesFromElement(elem, offset);

      assert.equal(result.length, 2);

      assert.equal(result[0].start, str0.length + offset);
      assert.equal(result[0].length, str1.length + str2.length);
      assert.equal(result[0].className, className);

      assert.equal(result[1].start, str0.length + str1.length + offset);
      assert.equal(result[1].length, str2.length);
      assert.equal(result[1].className, className);
    });

    test('_rangesFromString whitelist allows recursion', function() {
      var str = [
          '<span class="non-whtelisted-class">',
            '<span class="gr-diff gr-syntax gr-syntax-keyword">public</span>',
          '</span>'].join('');
      var result = element._rangesFromString(str);
      assert.notEqual(result.length, 0);
    });

    test('_isSectionDone', function() {
      var state = {sectionIndex: 0, lineIndex: 0};
      assert.isFalse(element._isSectionDone(state));

      state = {sectionIndex: 0, lineIndex: 2};
      assert.isFalse(element._isSectionDone(state));

      state = {sectionIndex: 0, lineIndex: 4};
      assert.isTrue(element._isSectionDone(state));

      state = {sectionIndex: 1, lineIndex: 2};
      assert.isFalse(element._isSectionDone(state));

      state = {sectionIndex: 1, lineIndex: 3};
      assert.isTrue(element._isSectionDone(state));

      state = {sectionIndex: 3, lineIndex: 0};
      assert.isFalse(element._isSectionDone(state));

      state = {sectionIndex: 3, lineIndex: 3};
      assert.isFalse(element._isSectionDone(state));

      state = {sectionIndex: 3, lineIndex: 4};
      assert.isTrue(element._isSectionDone(state));
    });
  });
</script>