First attempt at testing optimize-tree.

Author: sokra

test/cases/optimize-tree/a.js

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+require.ensure([], function() {
+	require("./a.txt");
+});
+
+a = {};

test/cases/optimize-tree/a.txt

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+a

test/cases/optimize-tree/b.js

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+require.ensure([], function() {
+	require("./b.txt");
+});
+
+b = {};

test/cases/optimize-tree/b.txt

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+b

test/cases/optimize-tree/expected/main.txt

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+index
+a
+b

test/cases/optimize-tree/index.js

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+require("./index.txt");
+
+require.ensure([], function() {
+	require("./a.js");
+}, 'a-chunk');
+
+require.ensure([], function() {
+	require("./b.js");
+}, 'b-chunk');

test/cases/optimize-tree/index.txt

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+index

test/cases/optimize-tree/webpack.config.js

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+var ExtractTextPlugin = require("../../../");
+var webpack = require("webpack");
+
+module.exports = {
+	entry: "./index.js",
+	plugins: [
+		new ExtractTextPlugin({
+			filename: "[name].txt",
+			allChunks: true
+		}),
+		new webpack.optimize.CommonsChunkPlugin({
+			children: true,
+			minChunks: 2
+		}),
+		new webpack.optimize.MinChunkSizePlugin({
+			minChunkSize: 51200 // 50ko
+		})
+	]
+};