Tests moved into separate folders (#3794)

Fix android crash on application exit

tests/app/trace/trace-tests.ts

@@ -0,0 +1,36 @@
+// >> trace-require
+import * as trace from "tns-core-modules/trace";
+// << trace-require
+
+export var test_DummyTestForSnippetOnly0 = function () {
+    // >> trace-all-categories
+    trace.setCategories(trace.categories.All);
+    trace.enable();
+    // << trace-all-categories
+}
+
+export var test_DummyTestForSnippetOnly1 = function () {
+    // >> trace-specific-categories
+    trace.setCategories(trace.categories.concat(
+        trace.categories.Binding
+        , trace.categories.Debug
+        , trace.categories.Layout
+        , trace.categories.NativeLifecycle
+        , trace.categories.Navigation
+        , trace.categories.Style
+        , trace.categories.ViewHierarchy
+        , trace.categories.VisualTreeEvents
+        ));
+    trace.enable();
+    // << trace-specific-categories
+}
+
+export var test_DummyTestForSnippetOnly2 = function () {
+    // >> trace-message
+    trace.setCategories(trace.categories.Debug);
+    trace.enable();
+    if (trace.isEnabled()) {
+        trace.write("My Debug Message", trace.categories.Debug);
+    }
+    // << trace-message
+}

tests/app/trace/trace.md

@@ -0,0 +1,19 @@
+---
+nav-title: "trace How-To"
+title: "trace"
+environment: nativescript
+description: "Examples for using trace"
+previous_url: /ApiReference/trace/HOW-TO
+---
+# Trace
+Tracing information about your app requires the "trace" module.
+{%snippet trace-require%}
+
+### Tracing all categories of events.
+{%snippet trace-all-categories%}
+
+### Tracing specific categories of events.
+{%snippet trace-specific-categories%}
+
+### Write your own trace message.
+{%snippet trace-message%}