"use strict";

describe("Zotero.Item", function () {
	describe("#getField()", function () {
		it("should return an empty string for valid unset fields on unsaved items", function () {
			var item = new Zotero.Item('book');
			assert.strictEqual(item.getField('rights'), "");
		});
		
		it("should return an empty string for valid unset fields on unsaved items after setting on another field", function () {
			var item = new Zotero.Item('book');
			item.setField('title', 'foo');
			assert.strictEqual(item.getField('rights'), "");
		});
		
		it("should return an empty string for invalid unset fields on unsaved items after setting on another field", function () {
			var item = new Zotero.Item('book');
			item.setField('title', 'foo');
			assert.strictEqual(item.getField('invalid'), "");
		});
	});
	
	describe("#setField", function () {
		it("should throw an error if item type isn't set", function () {
			var item = new Zotero.Item;
			assert.throws(() => item.setField('title', 'test'), "Item type must be set before setting field data");
		})
		
		it("should mark a field as changed", function () {
			var item = new Zotero.Item('book');
			item.setField('title', 'Foo');
			assert.isTrue(item._changed.itemData[Zotero.ItemFields.getID('title')]);
			assert.isTrue(item.hasChanged());
		})
		
		it("should save an integer as a string", function* () {
			var val = 1234;
			var item = new Zotero.Item('book');
			item.setField('numPages', val);
			yield item.saveTx();
			assert.strictEqual(item.getField('numPages'), "" + val);
			// Setting again as string shouldn't register a change
			assert.isFalse(item.setField('numPages', "" + val));
			
			// Value should be TEXT in the DB
			var sql = "SELECT TYPEOF(value) FROM itemData JOIN itemDataValues USING (valueID) "
				+ "WHERE itemID=? AND fieldID=?";
			var type = yield Zotero.DB.valueQueryAsync(sql, [item.id, Zotero.ItemFields.getID('numPages')]);
			assert.equal(type, 'text');
		});
		
		it("should save integer 0 as a string", function* () {
			var val = 0;
			var item = new Zotero.Item('book');
			item.setField('numPages', val);
			yield item.saveTx();
			assert.strictEqual(item.getField('numPages'), "" + val);
			// Setting again as string shouldn't register a change
			assert.isFalse(item.setField('numPages', "" + val));
		});
		
		it('should clear an existing field when ""/null/false is passed', function* () {
			var field = 'title';
			var val = 'foo';
			var fieldID = Zotero.ItemFields.getID(field);
			var item = new Zotero.Item('book');
			item.setField(field, val);
			yield item.saveTx();
			
			item.setField(field, "");
			assert.ok(item._changed.itemData[fieldID]);
			assert.isTrue(item.hasChanged());
			
			// Reset to original value
			yield item.reload();
			assert.isFalse(item.hasChanged());
			assert.equal(item.getField(field), val);
			
			// false
			item.setField(field, false);
			assert.ok(item._changed.itemData[fieldID]);
			assert.isTrue(item.hasChanged());
			
			// Reset to original value
			yield item.reload();
			assert.isFalse(item.hasChanged());
			assert.equal(item.getField(field), val);
			
			// null
			item.setField(field, null);
			assert.ok(item._changed.itemData[fieldID]);
			assert.isTrue(item.hasChanged());
			
			yield item.saveTx();
			assert.equal(item.getField(field), "");
		})
		
		it('should clear a field set to "0" when a ""/null/false is passed', function* () {
			var field = 'title';
			var val = "0";
			var fieldID = Zotero.ItemFields.getID(field);
			var item = new Zotero.Item('book');
			item.setField(field, val);
			yield item.saveTx();
			
			assert.strictEqual(item.getField(field), val);
			
			// ""
			item.setField(field, "");
			assert.ok(item._changed.itemData[fieldID]);
			assert.isTrue(item.hasChanged());
			
			// Reset to original value
			yield item.reload();
			assert.isFalse(item.hasChanged());
			assert.strictEqual(item.getField(field), val);
			
			// False
			item.setField(field, false);
			assert.ok(item._changed.itemData[fieldID]);
			assert.isTrue(item.hasChanged());
			
			// Reset to original value
			yield item.reload();
			assert.isFalse(item.hasChanged());
			assert.strictEqual(item.getField(field), val);
			
			// null
			item.setField(field, null);
			assert.ok(item._changed.itemData[fieldID]);
			assert.isTrue(item.hasChanged());
			
			yield item.saveTx();
			assert.strictEqual(item.getField(field), "");
		})
		
		it("should throw if value is undefined", function () {
			var item = new Zotero.Item('book');
			assert.throws(() => item.setField('title'), "'title' value cannot be undefined");
		})
		
		it("should not mark an empty field set to an empty string as changed", function () {
			var item = new Zotero.Item('book');
			item.setField('url', '');
			assert.isUndefined(item._changed.itemData);
		})
		
		it("should save version as object version", function* () {
			var item = new Zotero.Item('book');
			item.setField("version", 1);
			var id = yield item.saveTx();
			item = yield Zotero.Items.getAsync(id);
			assert.equal(item.getField("version"), 1);
			assert.equal(item.version, 1);
		});
		
		it("should save versionNumber for computerProgram", function* () {
			var item = new Zotero.Item('computerProgram');
			item.setField("versionNumber", "1.0");
			var id = yield item.saveTx();
			item = yield Zotero.Items.getAsync(id);
			assert.equal(item.getField("versionNumber"), "1.0");
		});
		
		it("should accept ISO 8601 dates", function* () {
			var fields = {
				accessDate: "2015-06-07T20:56:00Z",
				dateAdded: "2015-06-07T20:57:00Z",
				dateModified: "2015-06-07T20:58:00Z",
			};
			var item = createUnsavedDataObject('item');
			for (let i in fields) {
				item.setField(i, fields[i]);
			}
			assert.equal(item.getField('accessDate'), '2015-06-07 20:56:00');
			assert.equal(item.dateAdded, '2015-06-07 20:57:00');
			assert.equal(item.dateModified, '2015-06-07 20:58:00');
		})
		
		it("should accept SQL dates", function* () {
			var fields = {
				accessDate: "2015-06-07 20:56:00",
				dateAdded: "2015-06-07 20:57:00",
				dateModified: "2015-06-07 20:58:00",
			};
			var item = createUnsavedDataObject('item');
			for (let i in fields) {
				item.setField(i, fields[i]);
				item.getField(i, fields[i]);
			}
		})
		
		it("should ignore unknown accessDate values", function* () {
			var fields = {
				accessDate: "foo"
			};
			var item = createUnsavedDataObject('item');
			for (let i in fields) {
				item.setField(i, fields[i]);
			}
			assert.strictEqual(item.getField('accessDate'), '');
		})
	})
	
	describe("#dateAdded", function () {
		it("should use current time if value was not given for a new item", function* () {
			var item = new Zotero.Item('book');
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			
			assert.closeTo(Zotero.Date.sqlToDate(item.dateAdded, true).getTime(), Date.now(), 2000);
		})
		
		it("should use given value for a new item", function* () {
			var dateAdded = "2015-05-05 17:18:12";
			var item = new Zotero.Item('book');
			item.dateAdded = dateAdded;
			var id = yield item.saveTx();
			item = yield Zotero.Items.getAsync(id);
			assert.equal(item.dateAdded, dateAdded);
		})
	})
	
	describe("#dateModified", function () {
		it("should use given value for a new item", function* () {
			var dateModified = "2015-05-05 17:18:12";
			var item = new Zotero.Item('book');
			item.dateModified = dateModified;
			var id = yield item.saveTx();
			assert.equal(item.dateModified, dateModified);
			item = yield Zotero.Items.getAsync(id);
			assert.equal(item.dateModified, dateModified);
		})
		
		it("should use given value when skipDateModifiedUpdate is set for a new item", function* () {
			var dateModified = "2015-05-05 17:18:12";
			var item = new Zotero.Item('book');
			item.dateModified = dateModified;
			var id = yield item.saveTx({
				skipDateModifiedUpdate: true
			});
			assert.equal(item.dateModified, dateModified);
			item = yield Zotero.Items.getAsync(id);
			assert.equal(item.dateModified, dateModified);
		})
		
		it("should use current time if value was not given for an existing item", function* () {
			var dateModified = "2015-05-05 17:18:12";
			var item = new Zotero.Item('book');
			item.dateModified = dateModified;
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			
			// Save again without changing Date Modified
			item.setField('title', 'Test');
			yield item.saveTx()
			
			assert.closeTo(Zotero.Date.sqlToDate(item.dateModified, true).getTime(), Date.now(), 2000);
		})
		
		it("should use current time if the existing value was given for an existing item", function* () {
			var dateModified = "2015-05-05 17:18:12";
			var item = new Zotero.Item('book');
			item.dateModified = dateModified;
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			
			// Set Date Modified to existing value
			item.setField('title', 'Test');
			item.dateModified = dateModified;
			yield item.saveTx()
			assert.closeTo(Zotero.Date.sqlToDate(item.dateModified, true).getTime(), Date.now(), 2000);
		})
		
		it("should use current time if value is not given when skipDateModifiedUpdate is set for a new item", function* () {
			var item = new Zotero.Item('book');
			var id = yield item.saveTx({
				skipDateModifiedUpdate: true
			});
			item = yield Zotero.Items.getAsync(id);
			assert.closeTo(Zotero.Date.sqlToDate(item.dateModified, true).getTime(), Date.now(), 2000);
		})
		
		it("should keep original value when skipDateModifiedUpdate is set for an existing item", function* () {
			var dateModified = "2015-05-05 17:18:12";
			var item = new Zotero.Item('book');
			item.dateModified = dateModified;
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			
			// Resave with skipDateModifiedUpdate
			item.setField('title', 'Test');
			yield item.saveTx({
				skipDateModifiedUpdate: true
			})
			assert.equal(item.dateModified, dateModified);
		})
	})
	
	describe("#deleted", function () {
		it("should be set to true after save", function* () {
			var item = yield createDataObject('item');
			item.deleted = true;
			yield item.saveTx();
			assert.ok(item.deleted);
		})
		
		it("should be set to false after save", function* () {
			var collection = yield createDataObject('collection');
			var item = createUnsavedDataObject('item');
			item.deleted = true;
			yield item.saveTx();
			
			item.deleted = false;
			yield item.saveTx();
			assert.isFalse(item.deleted);
		})
	})
	
	describe("#parentID", function () {
		it("should create a child note", function* () {
			var item = new Zotero.Item('book');
			var parentItemID = yield item.saveTx();
			
			item = new Zotero.Item('note');
			item.parentID = parentItemID;
			var childItemID = yield item.saveTx();
			
			item = yield Zotero.Items.getAsync(childItemID);
			assert.ok(item.parentID);
			assert.equal(item.parentID, parentItemID);
		});
	});
	
	describe("#parentKey", function () {
		it("should be false for an unsaved attachment", function () {
			var item = new Zotero.Item('attachment');
			assert.isFalse(item.parentKey);
		});
		
		it("should be false on an unsaved non-attachment item", function () {
			var item = new Zotero.Item('book');
			assert.isFalse(item.parentKey);
		});
		
		it("should not be marked as changed setting to false on an unsaved item", function () {
			var item = new Zotero.Item('attachment');
			item.attachmentLinkMode = 'linked_url';
			item.parentKey = false;
			assert.isUndefined(item._changed.parentKey);
		});
		
		it("should not mark item as changed if false and no existing parent", function* () {
			var item = new Zotero.Item('attachment');
			item.attachmentLinkMode = 'linked_url';
			item.url = "https://www.zotero.org/";
			var id = yield item.saveTx();
			item = yield Zotero.Items.getAsync(id);
			
			item.parentKey = false;
			assert.isFalse(item.hasChanged());
		});
		
		it("should move a top-level note under another item", function* () {
			var noteItem = new Zotero.Item('note');
			var id = yield noteItem.saveTx()
			noteItem = yield Zotero.Items.getAsync(id);
			
			var item = new Zotero.Item('book');
			id = yield item.saveTx();
			var { libraryID, key } = Zotero.Items.getLibraryAndKeyFromID(id);
			
			noteItem.parentKey = key;
			yield noteItem.saveTx();
			
			assert.isFalse(noteItem.isTopLevelItem());
		})
		
		it("should remove top-level item from collections when moving it under another item", function* () {
			// Create a collection
			var collection = new Zotero.Collection;
			collection.name = "Test";
			var collectionID = yield collection.saveTx();
			
			// Create a top-level note and add it to a collection
			var noteItem = new Zotero.Item('note');
			noteItem.addToCollection(collectionID);
			var id = yield noteItem.saveTx()
			noteItem = yield Zotero.Items.getAsync(id);
			
			var item = new Zotero.Item('book');
			id = yield item.saveTx();
			var { libraryID, key } = Zotero.Items.getLibraryAndKeyFromID(id);
			noteItem.parentKey = key;
			yield noteItem.saveTx();
			
			assert.isFalse(noteItem.isTopLevelItem());
		})
	});
	
	describe("#getCreators()", function () {
		it("should update after creators are removed", function* () {
			var item = createUnsavedDataObject('item');
			item.setCreators([
				{
					creatorType: "author",
					name: "A"
				}
			]);
			yield item.saveTx();
			
			assert.lengthOf(item.getCreators(), 1);
			
			item.setCreators([]);
			yield item.saveTx();
			
			assert.lengthOf(item.getCreators(), 0);
		});
	});
	
	describe("#setCreators", function () {
		it("should accept an array of creators in API JSON format", function* () {
			var creators = [
				{
					firstName: "First",
					lastName: "Last",
					creatorType: "author"
				},
				{
					name: "Test Name",
					creatorType: "editor"
				}
			];
			
			var item = new Zotero.Item("journalArticle");
			item.setCreators(creators);
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			assert.sameDeepMembers(item.getCreatorsJSON(), creators);
		})
		
		it("should accept an array of creators in internal format", function* () {
			var creators = [
				{
					firstName: "First",
					lastName: "Last",
					fieldMode: 0,
					creatorTypeID: 1
				},
				{
					firstName: "",
					lastName: "Test Name",
					fieldMode: 1,
					creatorTypeID: 2
				}
			];
			
			var item = new Zotero.Item("journalArticle");
			item.setCreators(creators);
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			assert.sameDeepMembers(item.getCreators(), creators);
		})
		
		it("should clear creators if empty array passed", function () {
			var item = createUnsavedDataObject('item');
			item.setCreators([
				{
					firstName: "First",
					lastName: "Last",
					fieldMode: 0,
					creatorTypeID: 1
				}
			]);
			assert.lengthOf(item.getCreators(), 1);
			item.setCreators([]);
			assert.lengthOf(item.getCreators(), 0);
		});
	})
	
	describe("#getAttachments()", function () {
		it("#should return child attachments", function* () {
			var item = yield createDataObject('item');
			var attachment = new Zotero.Item("attachment");
			attachment.parentID = item.id;
			attachment.attachmentLinkMode = Zotero.Attachments.LINK_MODE_IMPORTED_FILE;
			yield attachment.saveTx();
			
			var attachments = item.getAttachments();
			assert.lengthOf(attachments, 1);
			assert.equal(attachments[0], attachment.id);
		})
		
		it("#should ignore trashed child attachments by default", function* () {
			var item = yield createDataObject('item');
			var attachment = new Zotero.Item("attachment");
			attachment.parentID = item.id;
			attachment.attachmentLinkMode = Zotero.Attachments.LINK_MODE_IMPORTED_FILE;
			attachment.deleted = true;
			yield attachment.saveTx();
			
			var attachments = item.getAttachments();
			assert.lengthOf(attachments, 0);
		})
		
		it("#should include trashed child attachments if includeTrashed=true", function* () {
			var item = yield createDataObject('item');
			var attachment = new Zotero.Item("attachment");
			attachment.parentID = item.id;
			attachment.attachmentLinkMode = Zotero.Attachments.LINK_MODE_IMPORTED_FILE;
			attachment.deleted = true;
			yield attachment.saveTx();
			
			var attachments = item.getAttachments(true);
			assert.lengthOf(attachments, 1);
			assert.equal(attachments[0], attachment.id);
		})
		
		it("#should return an empty array for an item with no attachments", function* () {
			var item = yield createDataObject('item');
			assert.lengthOf(item.getAttachments(), 0);
		})
		
		it("should update after an attachment is moved to another item", function* () {
			var item1 = yield createDataObject('item');
			var item2 = yield createDataObject('item');
			var item3 = new Zotero.Item('attachment');
			item3.parentID = item1.id;
			item3.attachmentLinkMode = 'linked_url';
			item3.setField('url', 'http://example.com');
			yield item3.saveTx();
			
			assert.lengthOf(item1.getAttachments(), 1);
			assert.lengthOf(item2.getAttachments(), 0);
			
			item3.parentID = item2.id;
			yield item3.saveTx();
			
			assert.lengthOf(item1.getAttachments(), 0);
			assert.lengthOf(item2.getAttachments(), 1);
		});
	})
	
	describe("#getNotes()", function () {
		it("#should return child notes", function* () {
			var item = yield createDataObject('item');
			var note = new Zotero.Item("note");
			note.parentID = item.id;
			yield note.saveTx();
			
			var notes = item.getNotes();
			assert.lengthOf(notes, 1);
			assert.equal(notes[0], note.id);
		})
		
		it("#should ignore trashed child notes by default", function* () {
			var item = yield createDataObject('item');
			var note = new Zotero.Item("note");
			note.parentID = item.id;
			note.deleted = true;
			yield note.saveTx();
			
			var notes = item.getNotes();
			assert.lengthOf(notes, 0);
		})
		
		it("#should include trashed child notes if includeTrashed=true", function* () {
			var item = yield createDataObject('item');
			var note = new Zotero.Item("note");
			note.parentID = item.id;
			note.deleted = true;
			yield note.saveTx();
			
			var notes = item.getNotes(true);
			assert.lengthOf(notes, 1);
			assert.equal(notes[0], note.id);
		})
		
		it("#should return an empty array for an item with no notes", function* () {
			var item = yield createDataObject('item');
			assert.lengthOf(item.getNotes(), 0);
		});
		
		it("should update after a note is moved to another item", function* () {
			var item1 = yield createDataObject('item');
			var item2 = yield createDataObject('item');
			var item3 = yield createDataObject('item', { itemType: 'note', parentID: item1.id });
			
			assert.lengthOf(item1.getNotes(), 1);
			assert.lengthOf(item2.getNotes(), 0);
			
			item3.parentID = item2.id;
			yield item3.saveTx();
			
			assert.lengthOf(item1.getNotes(), 0);
			assert.lengthOf(item2.getNotes(), 1);
		});
	})
	
	describe("#attachmentCharset", function () {
		it("should get and set a value", function* () {
			var charset = 'utf-8';
			var item = new Zotero.Item("attachment");
			item.attachmentLinkMode = Zotero.Attachments.LINK_MODE_IMPORTED_FILE;
			item.attachmentCharset = charset;
			var itemID = yield item.saveTx();
			assert.equal(item.attachmentCharset, charset);
			item = yield Zotero.Items.getAsync(itemID);
			assert.equal(item.attachmentCharset, charset);
		})
		
		it("should not allow a numerical value", function* () {
			var charset = 1;
			var item = new Zotero.Item("attachment");
			try {
				item.attachmentCharset = charset;
			}
			catch (e) {
				assert.equal(e.message, "Character set must be a string")
				return;
			}
			assert.fail("Numerical charset was allowed");
		})
		
		it("should not be marked as changed if not changed", function* () {
			var charset = 'utf-8';
			var item = new Zotero.Item("attachment");
			item.attachmentLinkMode = Zotero.Attachments.LINK_MODE_IMPORTED_FILE;
			item.attachmentCharset = charset;
			var itemID = yield item.saveTx();
			item = yield Zotero.Items.getAsync(itemID);
			
			// Set charset to same value
			item.attachmentCharset = charset
			assert.isFalse(item.hasChanged());
		})
	})
	
	describe("#attachmentFilename", function () {
		it("should get and set a filename for a stored file", function* () {
			var filename = "test.txt";
			
			// Create parent item
			var item = new Zotero.Item("book");
			var parentItemID = yield item.saveTx();
			
			// Create attachment item
			var item = new Zotero.Item("attachment");
			item.attachmentLinkMode = Zotero.Attachments.LINK_MODE_IMPORTED_FILE;
			item.parentID = parentItemID;
			var itemID = yield item.saveTx();
			
			// Should be empty when unset
			assert.equal(item.attachmentFilename, '');
			
			// Set filename
			item.attachmentFilename = filename;
			yield item.saveTx();
			item = yield Zotero.Items.getAsync(itemID);
			
			// Check filename
			assert.equal(item.attachmentFilename, filename);
			
			// Check full path
			var file = Zotero.Attachments.getStorageDirectory(item);
			file.append(filename);
			assert.equal(item.getFilePath(), file.path);
		});
		
		it.skip("should get and set a filename for a base-dir-relative file", function* () {
			
		})
	})
	
	describe("#attachmentPath", function () {
		it("should return an absolute path for a linked attachment", function* () {
			var file = getTestDataDirectory();
			file.append('test.png');
			var item = yield Zotero.Attachments.linkFromFile({ file });
			assert.equal(item.attachmentPath, file.path);
		})
		
		it("should return a prefixed path for an imported file", function* () {
			var file = getTestDataDirectory();
			file.append('test.png');
			var item = yield Zotero.Attachments.importFromFile({ file });
			
			assert.equal(item.attachmentPath, "storage:test.png");
		})
		
		it("should set a prefixed relative path for a path within the defined base directory", function* () {
			var dir = getTestDataDirectory().path;
			var dirname = OS.Path.basename(dir);
			var baseDir = OS.Path.dirname(dir);
			Zotero.Prefs.set('saveRelativeAttachmentPath', true)
			Zotero.Prefs.set('baseAttachmentPath', baseDir)
			
			var file = OS.Path.join(dir, 'test.png');
			
			var item = new Zotero.Item('attachment');
			item.attachmentLinkMode = 'linked_file';
			item.attachmentPath = file;
			
			assert.equal(item.attachmentPath, "attachments:data/test.png");
			
			Zotero.Prefs.set('saveRelativeAttachmentPath', false)
			Zotero.Prefs.clear('baseAttachmentPath')
		})
		
		it("should return a prefixed path for a linked attachment within the defined base directory", function* () {
			var dir = getTestDataDirectory().path;
			var dirname = OS.Path.basename(dir);
			var baseDir = OS.Path.dirname(dir);
			Zotero.Prefs.set('saveRelativeAttachmentPath', true)
			Zotero.Prefs.set('baseAttachmentPath', baseDir)
			
			var file = OS.Path.join(dir, 'test.png');
			
			var item = yield Zotero.Attachments.linkFromFile({
				file: Zotero.File.pathToFile(file)
			});
			
			assert.equal(item.attachmentPath, "attachments:data/test.png");
			
			Zotero.Prefs.set('saveRelativeAttachmentPath', false)
			Zotero.Prefs.clear('baseAttachmentPath')
		})
	})
	
	describe("#renameAttachmentFile()", function () {
		it("should rename an attached file", function* () {
			var file = getTestDataDirectory();
			file.append('test.png');
			var item = yield Zotero.Attachments.importFromFile({
				file: file
			});
			var newName = 'test2.png';
			yield item.renameAttachmentFile(newName);
			assert.equal(item.attachmentFilename, newName);
			var path = yield item.getFilePathAsync();
			assert.equal(OS.Path.basename(path), newName)
			yield OS.File.exists(path);
			
			// File should be flagged for upload
			// DEBUG: Is this necessary?
			assert.equal(item.attachmentSyncState, Zotero.Sync.Storage.Local.SYNC_STATE_TO_UPLOAD);
			assert.isNull(item.attachmentSyncedHash);
		})
	})
	
	
	describe("#getBestAttachmentState()", function () {
		it("should cache state for an existing file", function* () {
			var parentItem = yield createDataObject('item');
			var file = getTestDataDirectory();
			file.append('test.png');
			var childItem = yield Zotero.Attachments.importFromFile({
				file,
				parentItemID: parentItem.id
			});
			yield parentItem.getBestAttachmentState();
			assert.equal(parentItem.getBestAttachmentStateCached(), 1);
		})
		
		it("should cache state for a missing file", function* () {
			var parentItem = yield createDataObject('item');
			var file = getTestDataDirectory();
			file.append('test.png');
			var childItem = yield Zotero.Attachments.importFromFile({
				file,
				parentItemID: parentItem.id
			});
			let path = yield childItem.getFilePathAsync();
			yield OS.File.remove(path);
			yield parentItem.getBestAttachmentState();
			assert.equal(parentItem.getBestAttachmentStateCached(), -1);
		})
	})
	
	
	describe("#fileExists()", function () {
		it("should cache state for an existing file", function* () {
			var file = getTestDataDirectory();
			file.append('test.png');
			var item = yield Zotero.Attachments.importFromFile({ file });
			yield item.fileExists();
			assert.equal(item.fileExistsCached(), true);
		})
		
		it("should cache state for a missing file", function* () {
			var file = getTestDataDirectory();
			file.append('test.png');
			var item = yield Zotero.Attachments.importFromFile({ file });
			let path = yield item.getFilePathAsync();
			yield OS.File.remove(path);
			yield item.fileExists();
			assert.equal(item.fileExistsCached(), false);
		})
	})
	
	
	describe("#setTags", function () {
		it("should save an array of tags in API JSON format", function* () {
			var tags = [
				{
					tag: "A"
				},
				{
					tag: "B"
				}
			];
			var item = new Zotero.Item('journalArticle');
			item.setTags(tags);
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			assert.sameDeepMembers(item.getTags(tags), tags);
		})
		
		it("shouldn't mark item as changed if tags haven't changed", function* () {
			var tags = [
				{
					tag: "A"
				},
				{
					tag: "B"
				}
			];
			var item = new Zotero.Item('journalArticle');
			item.setTags(tags);
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			item.setTags(tags);
			assert.isFalse(item.hasChanged());
		})
		
		it("should remove an existing tag", function* () {
			var tags = [
				{
					tag: "A"
				},
				{
					tag: "B"
				}
			];
			var item = new Zotero.Item('journalArticle');
			item.setTags(tags);
			var id = yield item.saveTx();
			item = Zotero.Items.get(id);
			item.setTags(tags.slice(0));
			yield item.saveTx();
			assert.sameDeepMembers(item.getTags(tags), tags.slice(0));
		})
	})
	
	describe("#addTag", function () {
		it("should add a tag", function* () {
			var item = createUnsavedDataObject('item');
			item.addTag('a');
			yield item.saveTx();
			var tags = item.getTags();
			assert.deepEqual(tags, [{ tag: 'a' }]);
		})
		
		it("should add two tags", function* () {
			var item = createUnsavedDataObject('item');
			item.addTag('a');
			item.addTag('b');
			yield item.saveTx();
			var tags = item.getTags();
			assert.sameDeepMembers(tags, [{ tag: 'a' }, { tag: 'b' }]);
		})
		
		it("should add two tags of different types", function* () {
			var item = createUnsavedDataObject('item');
			item.addTag('a');
			item.addTag('b', 1);
			yield item.saveTx();
			var tags = item.getTags();
			assert.sameDeepMembers(tags, [{ tag: 'a' }, { tag: 'b', type: 1 }]);
		})
		
		it("should add a tag to an existing item", function* () {
			var item = yield createDataObject('item');
			item.addTag('a');
			yield item.saveTx();
			var tags = item.getTags();
			assert.deepEqual(tags, [{ tag: 'a' }]);
		})
		
		it("should add two tags to an existing item", function* () {
			var item = yield createDataObject('item');
			item.addTag('a');
			item.addTag('b');
			yield item.saveTx();
			var tags = item.getTags();
			assert.sameDeepMembers(tags, [{ tag: 'a' }, { tag: 'b' }]);
		})
	})
	
	//
	// Relations and related items
	//
	describe("#addRelatedItem", function () {
		it("should add a dc:relation relation to an item", function* () {
			var item1 = yield createDataObject('item');
			var item2 = yield createDataObject('item');
			item1.addRelatedItem(item2);
			yield item1.saveTx();
			
			var rels = item1.getRelationsByPredicate(Zotero.Relations.relatedItemPredicate);
			assert.lengthOf(rels, 1);
			assert.equal(rels[0], Zotero.URI.getItemURI(item2));
		})
		
		it("should allow an unsaved item to be related to an item in the user library", function* () {
			var item1 = yield createDataObject('item');
			var item2 = createUnsavedDataObject('item');
			item2.addRelatedItem(item1);
			yield item2.saveTx();
			
			var rels = item2.getRelationsByPredicate(Zotero.Relations.relatedItemPredicate);
			assert.lengthOf(rels, 1);
			assert.equal(rels[0], Zotero.URI.getItemURI(item1));
		})
		
		it("should throw an error for a relation in a different library", function* () {
			var group = yield getGroup();
			var item1 = yield createDataObject('item');
			var item2 = yield createDataObject('item', { libraryID: group.libraryID });
			try {
				item1.addRelatedItem(item2)
			}
			catch (e) {
				assert.ok(e);
				assert.equal(e.message, "Cannot relate item to an item in a different library");
				return;
			}
			assert.fail("addRelatedItem() allowed for an item in a different library");
		})
	})
	
	describe("#save()", function () {
		it("should throw an error for an empty item without an item type", function* () {
			var item = new Zotero.Item;
			var e = yield getPromiseError(item.saveTx());
			assert.ok(e);
			assert.equal(e.message, "Item type must be set before saving");
		})
	})
	
	
	describe("#multiDiff", function () {
		it("should return set of alternatives for differing fields in other items", function* () {
			var type = 'item';
			
			var dates = ['2016-03-08 17:44:45'];
			var accessDates = ['2016-03-08T18:44:45Z'];
			var urls = ['http://www.example.com', 'http://example.net'];
			
			var obj1 = createUnsavedDataObject(type);
			obj1.setField('date', '2016-03-07 12:34:56'); // different in 1 and 3, not in 2
			obj1.setField('url', 'http://example.com'); // different in all three
			obj1.setField('title', 'Test'); // only in 1
			
			var obj2 = createUnsavedDataObject(type);
			obj2.setField('url', urls[0]);
			obj2.setField('accessDate', accessDates[0]); // only in 2
			
			var obj3 = createUnsavedDataObject(type);
			obj3.setField('date', dates[0]);
			obj3.setField('url', urls[1]);
			
			var alternatives = obj1.multiDiff([obj2, obj3]);
			
			assert.sameMembers(Object.keys(alternatives), ['url', 'date', 'accessDate']);
			assert.sameMembers(alternatives.url, urls);
			assert.sameMembers(alternatives.date, dates);
			assert.sameMembers(alternatives.accessDate, accessDates);
		});
	});
	
	
	describe("#clone()", function () {
		// TODO: Expand to other data
		it("should copy creators", function* () {
			var item = new Zotero.Item('book');
			item.setCreators([
				{
					firstName: "A",
					lastName: "Test",
					creatorType: 'author'
				}
			]);
			yield item.saveTx();
			var newItem = item.clone();
			assert.sameDeepMembers(item.getCreators(), newItem.getCreators());
		})
	})
	
	describe("#toJSON()", function () {
		describe("default mode", function () {
			it("should output only fields with values", function* () {
				var itemType = "book";
				var title = "Test";
				
				var item = new Zotero.Item(itemType);
				item.setField("title", title);
				var id = yield item.saveTx();
				item = Zotero.Items.get(id);
				var json = item.toJSON();
				
				assert.equal(json.itemType, itemType);
				assert.equal(json.title, title);
				assert.isUndefined(json.date);
				assert.isUndefined(json.numPages);
			})
			
			it("should output 'deleted' as 1", function* () {
				var itemType = "book";
				var title = "Test";
				
				var item = new Zotero.Item(itemType);
				item.setField("title", title);
				item.deleted = true;
				var id = yield item.saveTx();
				item = Zotero.Items.get(id);
				var json = item.toJSON();
				
				assert.strictEqual(json.deleted, 1);
			})
			
			it.skip("should output attachment fields from file", function* () {
				var file = getTestDataDirectory();
				file.append('test.png');
				var item = yield Zotero.Attachments.importFromFile({ file });
				
				yield Zotero.DB.executeTransaction(function* () {
					yield Zotero.Sync.Storage.Local.setSyncedModificationTime(
						item.id, new Date().getTime()
					);
					yield Zotero.Sync.Storage.Local.setSyncedHash(
						item.id, 'b32e33f529942d73bea4ed112310f804'
					);
				});
				
				var json = item.toJSON();
				assert.equal(json.linkMode, 'imported_file');
				assert.equal(json.filename, 'test.png');
				assert.isUndefined(json.path);
				assert.equal(json.mtime, (yield item.attachmentModificationTime));
				assert.equal(json.md5, (yield item.attachmentHash));
			})
			
			it("should omit storage values with .skipStorageProperties", function* () {
				var file = getTestDataDirectory();
				file.append('test.png');
				var item = yield Zotero.Attachments.importFromFile({ file });
				
				item.attachmentSyncedModificationTime = new Date().getTime();
				item.attachmentSyncedHash = 'b32e33f529942d73bea4ed112310f804';
				yield item.saveTx({ skipAll: true });
				
				var json = item.toJSON({
					skipStorageProperties: true
				});
				assert.isUndefined(json.mtime);
				assert.isUndefined(json.md5);
			});
			
			it("should output synced storage values with .syncedStorageProperties", function* () {
				var item = new Zotero.Item('attachment');
				item.attachmentLinkMode = 'imported_file';
				item.fileName = 'test.txt';
				yield item.saveTx();
				
				var mtime = new Date().getTime();
				var md5 = 'b32e33f529942d73bea4ed112310f804';
				
				item.attachmentSyncedModificationTime = mtime;
				item.attachmentSyncedHash = md5;
				yield item.saveTx({ skipAll: true });
				
				var json = item.toJSON({
					syncedStorageProperties: true
				});
				assert.equal(json.mtime, mtime);
				assert.equal(json.md5, md5);
			})
			
			it.skip("should output unset storage properties as null", function* () {
				var item = new Zotero.Item('attachment');
				item.attachmentLinkMode = 'imported_file';
				item.fileName = 'test.txt';
				var id = yield item.saveTx();
				var json = item.toJSON();
				
				assert.isNull(json.mtime);
				assert.isNull(json.md5);
			})
			
			it("shouldn't include filename or path for linked_url attachments", function* () {
				var item = new Zotero.Item('attachment');
				item.attachmentLinkMode = 'linked_url';
				item.url = "https://www.zotero.org/";
				var json = item.toJSON();
				assert.notProperty(json, "filename");
				assert.notProperty(json, "path");
			});
		})
		
		describe("'full' mode", function () {
			it("should output all fields", function* () {
				var itemType = "book";
				var title = "Test";
				
				var item = new Zotero.Item(itemType);
				item.setField("title", title);
				var id = yield item.saveTx();
				item = yield Zotero.Items.getAsync(id);
				var json = item.toJSON({ mode: 'full' });
				assert.equal(json.title, title);
				assert.equal(json.date, "");
				assert.equal(json.numPages, "");
			})
		})
		
		describe("'patch' mode", function () {
			it("should output only fields that differ", function* () {
				var itemType = "book";
				var title = "Test";
				var date = "2015-05-12";
				
				var item = new Zotero.Item(itemType);
				item.setField("title", title);
				var id = yield item.saveTx();
				item = yield Zotero.Items.getAsync(id);
				var patchBase = item.toJSON();
				
				item.setField("date", date);
				yield item.saveTx();
				var json = item.toJSON({
					patchBase: patchBase
				})
				assert.isUndefined(json.itemType);
				assert.isUndefined(json.title);
				assert.equal(json.date, date);
				assert.isUndefined(json.numPages);
				assert.isUndefined(json.deleted);
				assert.isUndefined(json.creators);
				assert.isUndefined(json.relations);
				assert.isUndefined(json.tags);
			})
			
			it("should include changed 'deleted' field", function* () {
				// True to false
				var item = new Zotero.Item('book');
				item.deleted = true;
				var id = yield item.saveTx();
				item = yield Zotero.Items.getAsync(id);
				var patchBase = item.toJSON();
				
				item.deleted = false;
				var json = item.toJSON({
					patchBase: patchBase
				})
				assert.isUndefined(json.title);
				assert.isFalse(json.deleted);
				
				// False to true
				var item = new Zotero.Item('book');
				item.deleted = false;
				var id = yield item.saveTx();
				item = yield Zotero.Items.getAsync(id);
				var patchBase = item.toJSON();
				
				item.deleted = true;
				var json = item.toJSON({
					patchBase: patchBase
				})
				assert.isUndefined(json.title);
				assert.strictEqual(json.deleted, 1);
			})
			
			it("should set 'parentItem' to false when cleared", function* () {
				var item = yield createDataObject('item');
				var note = new Zotero.Item('note');
				note.parentID = item.id;
				// Create initial JSON with parentItem
				var patchBase = note.toJSON();
				// Clear parent item and regenerate JSON
				note.parentID = false;
				var json = note.toJSON({ patchBase });
				assert.isFalse(json.parentItem);
			});
			
			it("shouldn't clear storage properties from original in .skipStorageProperties mode", function* () {
				var item = new Zotero.Item('attachment');
				item.attachmentLinkMode = 'imported_file';
				item.attachmentFilename = 'test.txt';
				item.attachmentContentType = 'text/plain';
				item.attachmentCharset = 'utf-8';
				item.attachmentSyncedModificationTime = 1234567890000;
				item.attachmentSyncedHash = '18d21750c8abd5e3afa8ea89e3dfa570';
				var patchBase = item.toJSON({
					syncedStorageProperties: true
				});
				item.setNote("Test");
				var json = item.toJSON({
					patchBase,
					skipStorageProperties: true
				});
				Zotero.debug(json);
				assert.equal(json.note, "Test");
				assert.notProperty(json, "md5");
				assert.notProperty(json, "mtime");
			});
		})
	})
	
	describe("#fromJSON()", function () {
		it("should clear missing fields", function* () {
			var item = new Zotero.Item('book');
			item.setField('title', 'Test');
			item.setField('date', '2016');
			item.setField('accessDate', '2015-06-07T20:56:00Z');
			yield item.saveTx();
			var json = item.toJSON();
			// Remove fields, which should cause them to be cleared in fromJSON()
			delete json.date;
			delete json.accessDate;
			
			item.fromJSON(json);
			assert.strictEqual(item.getField('title'), 'Test');
			assert.strictEqual(item.getField('date'), '');
			assert.strictEqual(item.getField('accessDate'), '');
		});
		
		it("should ignore unknown fields", function* () {
			var json = {
				itemType: "journalArticle",
				title: "Test",
				foo: "Invalid"
			};
			var item = new Zotero.Item;
			item.fromJSON(json);
			assert.equal(item.getField('title'), 'Test');
		})
		
		it("should accept ISO 8601 dates", function* () {
			var json = {
				itemType: "journalArticle",
				accessDate: "2015-06-07T20:56:00Z",
				dateAdded: "2015-06-07T20:57:00Z",
				dateModified: "2015-06-07T20:58:00Z",
			};
			var item = new Zotero.Item;
			item.fromJSON(json);
			assert.equal(item.getField('accessDate'), '2015-06-07 20:56:00');
			assert.equal(item.dateAdded, '2015-06-07 20:57:00');
			assert.equal(item.dateModified, '2015-06-07 20:58:00');
		})
		
		it("should ignore non–ISO 8601 dates", function* () {
			var json = {
				itemType: "journalArticle",
				accessDate: "2015-06-07 20:56:00",
				dateAdded: "2015-06-07 20:57:00",
				dateModified: "2015-06-07 20:58:00",
			};
			var item = new Zotero.Item;
			item.fromJSON(json);
			assert.strictEqual(item.getField('accessDate'), '');
			// DEBUG: Should these be null, or empty string like other fields from getField()?
			assert.isNull(item.dateAdded);
			assert.isNull(item.dateModified);
		})
		
		it("should set creators", function* () {
			var json = {
				itemType: "journalArticle",
				creators: [
					{
						firstName: "First",
						lastName: "Last",
						creatorType: "author"
					},
					{
						name: "Test Name",
						creatorType: "editor"
					}
				]
			};
			
			var item = new Zotero.Item;
			item.fromJSON(json);
			var id = yield item.saveTx();
			assert.sameDeepMembers(item.getCreatorsJSON(), json.creators);
		})
		
		it("should map a base field to an item-specific field", function* () {
			var item = new Zotero.Item("bookSection");
			item.fromJSON({
				"itemType":"bookSection",
				"publicationTitle":"Publication Title"
			});
			assert.equal(item.getField("bookTitle"), "Publication Title");
		});
	});
});