chore: Test fallback prop. (#413)

Author: DylanVann

package.json

@@ -37,16 +37,16 @@
         }
     },
     "devDependencies": {
-        "@babel/core": "^7.1.6",
+        "@babel/core": "^7.3.3",
         "@semantic-release/changelog": "^3.0.2",
         "@semantic-release/commit-analyzer": "^6.1.0",
         "@semantic-release/git": "^7.0.7",
         "@semantic-release/npm": "^5.1.3",
         "@semantic-release/release-notes-generator": "^7.1.4",
-        "babel-jest": "^23.6.0",
+        "babel-jest": "^24.1.0",
         "commitizen": "^3.0.5",
         "cz-conventional-changelog": "^2.1.0",
-        "jest": "^23.6.0",
+        "jest": "^24.1.0",
         "metro-react-native-babel-preset": "0.48.1",
         "prettier": "^1.15.3",
         "prettier-check": "^2.0.0",

src/__snapshots__/index.test.js.snap

@@ -38,6 +38,40 @@ exports[`FastImage renders correctly. 1`] = `
 </View>
 `;
 
+exports[`Renders Image with fallback prop. 1`] = `
+<View
+  style={
+    Array [
+      Object {
+        "overflow": "hidden",
+      },
+      Object {
+        "height": 44,
+        "width": 44,
+      },
+    ]
+  }
+>
+  <FastImageView
+    resizeMode="cover"
+    source={
+      Object {
+        "testUri": "../../../react-native-fast-image-example-server/pictures/jellyfish.gif",
+      }
+    }
+    style={
+      Object {
+        "bottom": 0,
+        "left": 0,
+        "position": "absolute",
+        "right": 0,
+        "top": 0,
+      }
+    }
+  />
+</View>
+`;
+
 exports[`Renders a normal Image when not passed a uri. 1`] = `
 <View
   style={

src/index.test.js

@@ -36,3 +36,17 @@ test('Renders a normal Image when not passed a uri.', () => {
 
     expect(tree).toMatchSnapshot()
 })
+
+test('Renders Image with fallback prop.', () => {
+    const tree = renderer
+        .create(
+            <FastImage
+                source={require('../react-native-fast-image-example-server/pictures/jellyfish.gif')}
+                style={style.image}
+                fallback
+            />,
+        )
+        .toJSON()
+
+    expect(tree).toMatchSnapshot()
+})