Fix AnyToNullable removing any() import when untyped any() is still used (#354) (#960)

Also migrate no-arg any() from Mockito to ArgumentMatchers to prevent
the import from being dropped when typed any(Class) is converted to
nullable(Class).

Author: timtebeek

src/main/java/org/openrewrite/java/testing/mockito/AnyToNullable.java

@@ -61,6 +61,7 @@ public TreeVisitor<?, ExecutionContext> getVisitor(AtomicBoolean acc) {
                     doAfterVisit(new ChangeMethodName(
                             "org.mockito.Mockito any(java.lang.Class)", "nullable", null, null).getVisitor());
                     doAfterVisit(new ChangeMethodTargetToStatic("org.mockito.Mockito nullable(java.lang.Class)", "org.mockito.ArgumentMatchers", null, null, false).getVisitor());
+                    doAfterVisit(new ChangeMethodTargetToStatic("org.mockito.Mockito any()", "org.mockito.ArgumentMatchers", null, null, false).getVisitor());
                     doAfterVisit(new AnyStringToNullable().getVisitor());
                 }
                 return super.preVisit(tree, ctx);

src/test/java/org/openrewrite/java/testing/mockito/AnyToNullableTest.java

@@ -99,6 +99,69 @@ void test() {
         );
     }
 
+    @Test
+    void shouldNotRemoveAnyImportWhenUntypedAnyIsStillUsed() {
+        //language=java
+        rewriteRun(
+          //language=xml
+          pomXml(
+                """
+            <project>
+                <modelVersion>4.0.0</modelVersion>
+                <groupId>com.example</groupId>
+                <artifactId>foo</artifactId>
+                <version>1.0.0</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.mockito</groupId>
+                        <artifactId>mockito-all</artifactId>
+                        <version>1.10.19</version>
+                    </dependency>
+                </dependencies>
+            </project>
+            """
+          ),
+          //language=java
+          java(
+                """
+            class Example {
+                String greet(Object obj, Object obj2) {
+                    return "Hello " + obj + obj2;
+                }
+            }
+            """
+          ),
+          //language=java
+          java(
+            """
+              import static org.mockito.Mockito.mock;
+              import static org.mockito.Mockito.when;
+              import static org.mockito.Mockito.any;
+
+              class MyTest {
+                   void test() {
+                      Example example = mock(Example.class);
+                      when(example.greet(any(Object.class), any())).thenReturn("Hello world");
+                   }
+              }
+              """,
+            """
+              import static org.mockito.ArgumentMatchers.any;
+              import static org.mockito.ArgumentMatchers.nullable;
+              import static org.mockito.Mockito.mock;
+              import static org.mockito.Mockito.when;
+
+              class MyTest {
+                   void test() {
+                      Example example = mock(Example.class);
+                      when(example.greet(nullable(Object.class), any())).thenReturn("Hello world");
+                   }
+              }
+              """
+          )
+        );
+    }
+
     @Test
     void doesNotTouchIfMockitoTwoPlus() {
         //language=java