Additional assignment test

Author: mglukhikh

compiler/testData/diagnostics/tests/smartCasts/varnotnull/assignment.kt

@@ -0,0 +1,10 @@
+fun foo() {
+    var v: String? = null
+    v<!UNSAFE_CALL!>.<!>length()
+    v = "abc"
+    <!DEBUG_INFO_SMARTCAST!>v<!>.length()
+    v = null
+    v<!UNSAFE_CALL!>.<!>length()
+    v = "abc"
+    <!DEBUG_INFO_SMARTCAST!>v<!>.length()
+}

compiler/testData/diagnostics/tests/smartCasts/varnotnull/assignment.txt

@@ -0,0 +1,3 @@
+package
+
+internal fun foo(): kotlin.Unit

compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestGenerated.java

@@ -11453,6 +11453,12 @@ public void testAllFilesPresentInVarnotnull() throws Exception {
                     JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/diagnostics/tests/smartCasts/varnotnull"), Pattern.compile("^(.+)\\.kt$"), true);
                 }
 
+                @TestMetadata("assignment.kt")
+                public void testAssignment() throws Exception {
+                    String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/smartCasts/varnotnull/assignment.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("false01.kt")
                 public void testFalse01() throws Exception {
                     String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/smartCasts/varnotnull/false01.kt");