Add more unit-tests for `primitives.js`

test/unit/primitives_spec.js

@@ -1,15 +1,46 @@
 /* globals expect, it, describe, beforeEach, Name, Dict, Ref, RefSet, Cmd,
-           jasmine, isDict, isRefsEqual */
+           jasmine, isName, isCmd, isDict, isRef, isRefsEqual */
 
 'use strict';
 
 describe('primitives', function() {
+  function XRefMock(array) {
+    this.map = Object.create(null);
+    for (var elem in array) {
+      var obj = array[elem];
+      var ref = obj.ref, data = obj.data;
+      this.map[ref.toString()] = data;
+    }
+  }
+  XRefMock.prototype = {
+    fetch: function (ref) {
+      return this.map[ref.toString()];
+    },
+    fetchIfRef: function (obj) {
+      if (!isRef(obj)) {
+        return obj;
+      }
+      return this.fetch(obj);
+    },
+  };
+
   describe('Name', function() {
     it('should retain the given name', function() {
       var givenName = 'Font';
       var name = Name.get(givenName);
       expect(name.name).toEqual(givenName);
     });
+
+    it('should create only one object for a name and cache it', function () {
+      var firstFont = Name.get('Font');
+      var secondFont = Name.get('Font');
+      var firstSubtype = Name.get('Subtype');
+      var secondSubtype = Name.get('Subtype');
+
+      expect(firstFont).toBe(secondFont);
+      expect(firstSubtype).toBe(secondSubtype);
+      expect(firstFont).not.toBe(firstSubtype);
+    });
   });
 
   describe('Cmd', function() {
@@ -24,6 +55,7 @@ describe('primitives', function() {
       var secondBT = Cmd.get('BT');
       var firstET = Cmd.get('ET');
       var secondET = Cmd.get('ET');
+
       expect(firstBT).toBe(secondBT);
       expect(firstET).toBe(secondET);
       expect(firstBT).not.toBe(firstET);
@@ -116,6 +148,62 @@ describe('primitives', function() {
       expect(callbackSpyCalls.argsFor(2)).toEqual(['FontFile3', testFontFile3]);
       expect(callbackSpyCalls.count()).toEqual(3);
     });
+
+    it('should handle keys pointing to indirect objects', function () {
+      var fontRef = new Ref(1, 0);
+      var xref = new XRefMock([
+        { ref: fontRef, data: testFontFile, }
+      ]);
+      var fontDict = new Dict(xref);
+      fontDict.set('FontFile', fontRef);
+
+      expect(fontDict.getRaw('FontFile')).toEqual(fontRef);
+      expect(fontDict.get('FontFile')).toEqual(testFontFile);
+    });
+
+    it('should handle arrays containing indirect objects', function () {
+      var minCoordRef = new Ref(1, 0), maxCoordRef = new Ref(2, 0);
+      var minCoord = 0, maxCoord = 1;
+      var xref = new XRefMock([
+        { ref: minCoordRef, data: minCoord, },
+        { ref: maxCoordRef, data: maxCoord, }
+      ]);
+      var xObjectDict = new Dict(xref);
+      xObjectDict.set('BBox', [minCoord, maxCoord, minCoordRef, maxCoordRef]);
+
+      expect(xObjectDict.get('BBox')).toEqual(
+        [minCoord, maxCoord, minCoordRef, maxCoordRef]);
+      expect(xObjectDict.getArray('BBox')).toEqual(
+        [minCoord, maxCoord, minCoord, maxCoord]);
+    });
+
+    it('should get all key names', function () {
+      var expectedKeys = ['FontFile', 'FontFile2', 'FontFile3'];
+      var keys = dictWithManyKeys.getKeys();
+
+      expect(keys.sort()).toEqual(expectedKeys);
+    });
+
+    it('should create only one object for Dict.empty', function () {
+      var firstDictEmpty = Dict.empty;
+      var secondDictEmpty = Dict.empty;
+
+      expect(firstDictEmpty).toBe(secondDictEmpty);
+      expect(firstDictEmpty).not.toBe(emptyDict);
+    });
+
+    it('should correctly merge dictionaries', function () {
+      var expectedKeys = ['FontFile', 'FontFile2', 'FontFile3', 'Size'];
+
+      var fontFileDict = new Dict();
+      fontFileDict.set('FontFile', 'Type1 font file');
+      var mergedDict = Dict.merge(null,
+        [dictWithManyKeys, dictWithSizeKey, fontFileDict]);
+      var mergedKeys = mergedDict.getKeys();
+
+      expect(mergedKeys.sort()).toEqual(expectedKeys);
+      expect(mergedDict.get('FontFile')).toEqual(testFontFile);
+    });
   });
 
   describe('Ref', function() {
@@ -146,9 +234,45 @@ describe('primitives', function() {
     });
   });
 
+  describe('isName', function () {
+    it('handles non-names', function () {
+      var nonName = {};
+      expect(isName(nonName)).toEqual(false);
+    });
+
+    it('handles names', function () {
+      var name = Name.get('Font');
+      expect(isName(name)).toEqual(true);
+    });
+  });
+
+  describe('isCmd', function () {
+    it('handles non-commands', function () {
+      var nonCmd = {};
+      expect(isCmd(nonCmd)).toEqual(false);
+    });
+
+    it('handles commands', function () {
+      var cmd = Cmd.get('BT');
+      expect(isCmd(cmd)).toEqual(true);
+    });
+
+    it('handles commands with cmd check', function () {
+      var cmd = Cmd.get('BT');
+      expect(isCmd(cmd, 'BT')).toEqual(true);
+      expect(isCmd(cmd, 'ET')).toEqual(false);
+    });
+  });
+
   describe('isDict', function() {
+    it('handles non-dictionaries', function () {
+      var nonDict = {};
+      expect(isDict(nonDict)).toEqual(false);
+    });
+
     it('handles empty dictionaries with type check', function() {
-      var dict = new Dict();
+      var dict = Dict.empty;
+      expect(isDict(dict)).toEqual(true);
       expect(isDict(dict, 'Page')).toEqual(false);
     });
 
@@ -156,6 +280,19 @@ describe('primitives', function() {
       var dict = new Dict();
       dict.set('Type', Name.get('Page'));
       expect(isDict(dict, 'Page')).toEqual(true);
+      expect(isDict(dict, 'Contents')).toEqual(false);
+    });
+  });
+
+  describe('isRef', function () {
+    it ('handles non-refs', function () {
+      var nonRef = {};
+      expect(isRef(nonRef)).toEqual(false);
+    });
+
+    it ('handles refs', function () {
+      var ref = new Ref(1, 0);
+      expect(isRef(ref)).toEqual(true);
     });
   });