test: improve code coverage

src/__mocks__/mapbox-gl.js

@@ -49,14 +49,26 @@ Map.prototype.setStyle = jest.fn();
 
 Map.prototype.addSource = function addSource(name, source) {
   this._sources[name] = source;
+  this.style.sourceCaches[name] = {
+    clearTiles: jest.fn()
+  };
 };
 
 Map.prototype.getSource = function getSource(name) {
   if (!this._sources[name]) {
     return undefined;
   }
 
-  return { ...this._sources[name], setData: jest.fn(), load: jest.fn() };
+  const source = {
+    setData: jest.fn(),
+    load: jest.fn(),
+    _tileJSONRequest: {
+      cancel: jest.fn()
+    },
+    ...this._sources[name]
+  };
+
+  return source;
 };
 
 Map.prototype.removeSource = function removeSource(name) {
@@ -101,7 +113,15 @@ Map.prototype.getBounds = () => new LngLatBounds();
 function Popup() {
   this.setLngLat = jest.fn(() => this);
   this.getLngLat = jest.fn(() => this);
-  this.addTo = jest.fn(() => this);
+
+  this.addTo = jest.fn((map) => {
+    if (!map) {
+      throw new Error();
+    }
+
+    return this;
+  });
+
   this.setDOMContent = jest.fn(() => this);
   this.remove = jest.fn();
 
@@ -115,7 +135,15 @@ Popup.prototype.on = function on(listener, fn) {
 function Marker() {
   this.setLngLat = jest.fn(() => this);
   this.getLngLat = jest.fn(() => this);
-  this.addTo = jest.fn(() => this);
+
+  this.addTo = jest.fn((map) => {
+    if (!map) {
+      throw new Error();
+    }
+
+    return this;
+  });
+
   this.remove = jest.fn();
 
   return this;

src/components/Layer/index.test.js

@@ -121,6 +121,8 @@ test('handlers', () => {
   });
 
   expect(handler).toHaveBeenCalledTimes(4);
+
+  // wrapper.setProps({ children: [] });
 });
 
 test('throws', () => {

src/components/Marker/index.test.js

@@ -48,7 +48,7 @@ test('update', () => {
   });
 });
 
-test.skip('throws', () => {
+test('throws', () => {
   console.error = jest.fn();
 
   expect(() =>

src/components/Popup/index.test.js

@@ -50,7 +50,7 @@ test('update', () => {
   });
 });
 
-test.skip('throws', () => {
+test('throws', () => {
   console.error = jest.fn();
 
   expect(() =>

src/components/Source/index.test.js

@@ -102,8 +102,10 @@ test('remove and add new source', () => {
 test('throws', () => {
   console.error = jest.fn();
   const data = { type: 'FeatureCollection', features: [] };
+
   expect(() =>
     mount(<Source id="test" type="geojson" data={data} />)
   ).toThrow();
+
   expect(console.error).toHaveBeenCalled();
 });