add tests

Author: Ilya Brin

handlebars/src/test/java/com/github/jknack/handlebars/InternalDataTest.java

@@ -0,0 +1,56 @@
+package com.github.jknack.handlebars;
+
+import com.github.jknack.handlebars.context.FieldValueResolver;
+import com.github.jknack.handlebars.context.JavaBeanValueResolver;
+import com.github.jknack.handlebars.context.MapValueResolver;
+import com.github.jknack.handlebars.context.MethodValueResolver;
+import java.io.IOException;
+
+import org.junit.Test;
+
+public class InternalDataTest extends AbstractTest {
+
+  @Override
+  protected Handlebars newHandlebars() {
+    Handlebars handlebars = new Handlebars();
+    handlebars.registerHelper("printFooAndBar", (context, options) ->
+            String.format("%s %s", options.context.data("foo"), options.context.internalData("bar")));
+    return handlebars;
+  }
+
+  @Override
+  protected Object configureContext(final Object model) {
+    return Context.newBuilder(model)
+        .resolver(
+                MapValueResolver.INSTANCE,
+                JavaBeanValueResolver.INSTANCE,
+                FieldValueResolver.INSTANCE,
+                MethodValueResolver.INSTANCE)
+        .build()
+        .data("foo", "foo")
+        .internalData("bar", "bar");
+  }
+
+  @Test
+  public void dataAvailableForRendering() throws IOException {
+    shouldCompileTo("{{foo}}", "", "foo");
+  }
+
+  @Test
+  public void internalDataNotAvailableForRendering() throws IOException {
+    shouldCompileTo("{{bar}}", "", "");
+    shouldCompileTo("{{./bar}}", "", "");
+    shouldCompileTo("{{../bar}}", "", "");
+    shouldCompileTo("{{.././bar}}", "", "");
+    shouldCompileTo("{{this.bar}}", "", "");
+    shouldCompileTo("{{internalData}}", "", "");
+    shouldCompileTo("{{internalData.bar}}", "", "");
+    shouldCompileTo("{{this.internalData}}", "", "");
+    shouldCompileTo("{{this.internalData.bar}}", "", "");
+  }
+
+  @Test
+  public void percentFormat() throws IOException {
+    shouldCompileTo("{{printFooAndBar}}", "", "foo bar");
+  }
+}