4952 + 4964: Angular grid list class implementation and refactoring tests

jdi-light-angular-tests/src/test/java/io/github/epam/angular/tests/elements/complex/GridListTests.java

@@ -47,6 +47,9 @@ public void dynamicGridListTest() {
             .and().colspan(1)
             .and().rowspan(2);
 
+        dynamicGridList.tileByIndex(2).content().find(".avatar-img").is()
+            .attr("src","https://material.angular.io/assets/img/examples/shiba2.jpg");
+
         dynamicGridList.tileByIndex(3)
             .is().colspan(1)
             .and().rowspan(1)

jdi-light-angular/src/main/java/com/epam/jdi/light/angular/elements/complex/gridlist/GridList.java

@@ -4,7 +4,6 @@
 import com.epam.jdi.light.common.JDIAction;
 import com.epam.jdi.light.elements.base.UIListBase;
 
-import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 /**
@@ -23,14 +22,17 @@ public String rowHeight() {
         return core().getAttribute("rowheight");
     }
 
-    @JDIAction(value = "Get '{name}' gutter size in pixels")
+    @JDIAction(value = "Get '{name}' gutter size")
     public String gutterSize() {
         return core().getAttribute("guttersize");
     }
 
     @JDIAction(value = "Get '{name}' tile by index '{0}' (1 based index)")
     public GridTile tileByIndex(int index) {
-        return getTiles().collect(Collectors.toList()).get(index - 1);
+        return getTiles()
+            .skip(index - 1)
+            .findFirst()
+            .orElseThrow(() -> new IllegalArgumentException("No tile at index " + index));
     }
 
     @Override

jdi-light-angular/src/main/java/com/epam/jdi/light/angular/elements/complex/gridlist/GridTile.java

@@ -87,6 +87,11 @@ public AngularColors footerAngularBackgroundColor() {
         return AngularColors.fromColor(footerBackgroundColor());
     }
 
+    @JDIAction("Get '{name}' content")
+    public UIElement content() {
+        return core();
+    }
+
     @JDIAction("Get '{name}' header text")
     public String headerText() {
         return core().find(HEADER_LOCATOR).text();