Added snapshot testing.

.babelrc

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+{
+	"presets": ["react-native"]
+}

.editorconfig

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+# This file is for unifying the coding style for different editors and IDEs
+# editorconfig.org
+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = tab
+
+[*.js]
+indent_size = 4
+
+[*.json]
+indent_style = space
+indent_size = 2
+
+[*.yml]
+indent_style = space
+indent_size = 2

__mocks__/.eslintrc.js

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+module.exports = {
+    'env': {
+        'es6': true,
+        'jest': true,
+    },
+};

__mocks__/react-native-maps.js

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+import React from 'react';
+
+export default class MapView extends React.Component {
+	render () {
+		return React.createElement('MapView', this.props, this.props.children);
+	}
+}
+
+class Marker extends React.Component {
+	render () {
+		return React.createElement('Marker', this.props, this.props.children);
+	}
+}
+
+MapView.Marker = Marker;

__tests__/.eslintrc.js

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+module.exports = {
+    'env': {
+        'es6': true,
+        'jest': true,
+    },
+};