Adding tests for the top-level parser class

spec/parser/javascript_spec.js

@@ -0,0 +1,104 @@
+import Parser from 'src/js/parser/javascript.js';
+import regexpParser from 'src/js/parser/javascript/grammar.peg';
+import Snap from 'snapsvg';
+import Q from 'q';
+
+describe('parser/javascript.js', function() {
+
+  beforeEach(function() {
+    this.parser = new Parser();
+  });
+
+  describe('#parser', function() {
+
+    beforeEach(function() {
+      spyOn(regexpParser, 'parse');
+    });
+
+    it('parses the expression', function(done) {
+      this.parser.parse('example expression')
+        .then(() => {
+          expect(regexpParser.parse).toHaveBeenCalledWith('example expression');
+        })
+        .finally(done);
+    });
+
+    it('replaces newlines with "\\n"', function(done) {
+      this.parser.parse('multiline\nexpression')
+        .then(() => {
+          expect(regexpParser.parse).toHaveBeenCalledWith('multiline\\nexpression');
+        })
+        .finally(done);
+    });
+
+    it('resolves the returned promise with the parser instance', function(done) {
+      this.parser.parse('example expression')
+        .then(result => {
+          expect(result).toEqual(this.parser);
+        })
+        .finally(done);
+    });
+
+  });
+
+  describe('#render', function() {
+
+    beforeEach(function() {
+      this.renderPromise = Q.defer();
+      this.parser.parsed = jasmine.createSpyObj('parsed', ['render']);
+      this.parser.parsed.render.and.returnValue(this.renderPromise.promise);
+
+      this.svg = Snap(document.createElement('svg'));
+      spyOn(this.svg, 'group').and.returnValue('example group');
+    });
+
+    it('render the parsed expression', function() {
+      this.parser.render(this.svg, 10);
+      expect(this.parser.parsed.render).toHaveBeenCalledWith('example group');
+    });
+
+    describe('when rendering is complete', function() {
+
+      beforeEach(function(done) {
+        this.result = jasmine.createSpyObj('result', ['getBBox', 'transform']);
+        this.result.getBBox.and.returnValue({
+          x: 4,
+          y: 2,
+          width: 42,
+          height: 24
+        });
+
+        spyOn(this.svg, 'attr');
+
+        this.parser.render(this.svg, 10);
+        this.renderPromise.resolve(this.result);
+
+        setTimeout(done, 10);
+      });
+
+      it('positions the renderd expression', function() {
+        expect(this.result.transform).toHaveBeenCalledWith(Snap.matrix()
+          .translate(6, 8));
+      });
+
+      it('sets the dimensions of the image', function() {
+        expect(this.svg.attr).toHaveBeenCalledWith({
+          width: 62,
+          height: 44
+        });
+      });
+
+    });
+
+  });
+
+  describe('#cancel', function() {
+
+    it('sets the cancelRender state to true', function() {
+      this.parser.cancel();
+      expect(this.parser.state.cancelRender).toEqual(true);
+    });
+
+  });
+
+});