Count built files

spec/CachingSpec.js

@@ -31,11 +31,46 @@ function setUpCompiler (htmlWebpackPlugin) {
   return compiler;
 }
 
+function getCompiledModuleCount (statsJson) {
+  return statsJson.modules.filter(function (webpackModule) {
+    return webpackModule.built;
+  }).length + statsJson.children.reduce(function (sum, childCompilationStats) {
+    return sum + getCompiledModuleCount(childCompilationStats);
+  }, 0);
+}
+
 describe('HtmlWebpackPluginCaching', function () {
   beforeEach(function (done) {
     rm_rf(OUTPUT_DIR, done);
   });
 
+  it('should compile nothing if no file was changed', function (done) {
+    var template = path.join(__dirname, 'fixtures/plain.html');
+    var htmlWebpackPlugin = new HtmlWebpackPlugin({
+      template: template
+    });
+    var childCompilerHash;
+    var compiler = setUpCompiler(htmlWebpackPlugin);
+    compiler.run()
+      // Change the template file and compile again
+      .then(function () {
+        childCompilerHash = htmlWebpackPlugin.childCompilerHash;
+        return compiler.run();
+      })
+      .then(function (stats) {
+        // Verify that no file was built
+        expect(getCompiledModuleCount(stats.toJson()))
+          .toBe(0);
+        // Verify that the html was processed only during the inital build
+        expect(htmlWebpackPlugin.evaluateCompilationResult.calls.count())
+          .toBe(1);
+        // Verify that the child compilation was executed twice
+        expect(htmlWebpackPlugin.childCompilerHash)
+          .toBe(childCompilerHash);
+      })
+      .then(done);
+  });
+
   it('should not compile the webpack html file if only a javascript file was changed', function (done) {
     var htmlWebpackPlugin = new HtmlWebpackPlugin();
     var compiler = setUpCompiler(htmlWebpackPlugin);
@@ -47,8 +82,11 @@ describe('HtmlWebpackPluginCaching', function () {
         compiler.simulateFileChange(path.join(__dirname, 'fixtures/index.js'), {footer: '//1'});
         return compiler.run();
       })
-      .then(function () {
-        // Verify that the html was processed only once
+      .then(function (stats) {
+        // Verify that only one file was built
+        expect(getCompiledModuleCount(stats.toJson()))
+          .toBe(1);
+        // Verify that the html was processed only during the inital build
         expect(htmlWebpackPlugin.evaluateCompilationResult.calls.count())
           .toBe(1);
         // Verify that the child compilation was executed only once
@@ -71,7 +109,10 @@ describe('HtmlWebpackPluginCaching', function () {
         compiler.simulateFileChange(path.join(__dirname, 'fixtures/index.js'), {footer: '//1'});
         return compiler.run();
       })
-      .then(function () {
+      .then(function (stats) {
+        // Verify that only one file was built
+        expect(getCompiledModuleCount(stats.toJson()))
+          .toBe(1);
         // Verify that the html was processed on every run
         expect(htmlWebpackPlugin.evaluateCompilationResult.calls.count())
           .toBe(2);
@@ -96,7 +137,10 @@ describe('HtmlWebpackPluginCaching', function () {
         compiler.simulateFileChange(template, {footer: '<!-- 1 -->'});
         return compiler.run();
       })
-      .then(function () {
+      .then(function (stats) {
+        // Verify that only one file was built
+        expect(getCompiledModuleCount(stats.toJson()))
+          .toBe(1);
         // Verify that the html was processed twice
         expect(htmlWebpackPlugin.evaluateCompilationResult.calls.count())
           .toBe(2);