[flow][tests] Eliminate uses of React$MixedElement in tests

Summary:
The final prep step of adding it to the banned internal-type list.

Changelog: [internal]

Reviewed By: gkz

Differential Revision: D67480744

fbshipit-source-id: 8413870b753bdcaf8c989511c5b658aef9281936

tests/facebook_fbs_none/main.js

@@ -1,3 +1,3 @@
 var React = require('react');
-(<fbs />: React$MixedElement);
+(<fbs />: React.MixedElement);
 (<fbs />: number); // Error: ReactElement ~> number

tests/facebook_fbt_none/main.js

@@ -1,3 +1,3 @@
 var React = require('react');
-(<fbt />: React$MixedElement);
+(<fbt />: React.MixedElement);
 (<fbt />: number); // Error: ReactElement ~> number

tests/react_abstract_component/strict.js

@@ -2,28 +2,28 @@ const React = require('react');
 
 declare var Component : React$ElementType;
 const c = <Component f = {3}/>;
-(c : React$MixedElement);
+(c : React.MixedElement);
 
 declare function foo(a: ?React$Component<any, any>): void;
 declare var ref: ?React.ElementRef<React$ElementType>;
 foo(ref);
 
 class Component2 extends React.Component<{}> {};
 const d = <Component2/>;
-(d: React$MixedElement);
+(d: React.MixedElement);
 
 type Props = {someProp : string};
 type State = {};
 
 class MyComponent extends React.Component<Props, State> {
   static _cloneElement(
     element: ExactReactElement_DEPRECATED<typeof MyComponent>,
-  ): React$MixedElement {
+  ): React.MixedElement {
     const someProp = 'some value';
     return React.cloneElement(element, {someProp});
   }
 }
 
 
 declare var e : ExactReactElement_DEPRECATED<Class<Component2>>;
-(e : React$MixedElement);
+(e : React.MixedElement);

tests/react_jsx/test.js

@@ -950,7 +950,7 @@ const EnhancedClass_DefaultProps = hoc(Class_DefaultProps);
   foo={1}
 />;
 
-class ThisInJsxTag extends React.Component<{tag: () => React$MixedElement}> {
+class ThisInJsxTag extends React.Component<{tag: () => React.MixedElement}> {
   render(): React.Node {
     return <this.props.tag />; // OK
   }

tests/render_types/render_types.exp

@@ -963,7 +963,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. Only elemen
 appear in renders but string [2] is not a component-syntax component. [invalid-render]
 
    renders_to_renders.js:60:25
-    60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+    60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                 ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -978,7 +978,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. You can onl
 when the third type argument is a render type and undefined [2] is not a render type. [invalid-render]
 
    renders_to_renders.js:60:25
-   60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+   60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -993,7 +993,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. You can onl
 when the third type argument is a render type and null [2] is not a render type. [invalid-render]
 
    renders_to_renders.js:60:25
-   60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+   60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -1008,7 +1008,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. You can onl
 when the third type argument is a render type and boolean [2] is not a render type. [invalid-render]
 
    renders_to_renders.js:60:25
-   60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+   60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -1023,7 +1023,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. You can onl
 when the third type argument is a render type and number [2] is not a render type. [invalid-render]
 
    renders_to_renders.js:60:25
-   60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+   60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -1038,7 +1038,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. You can onl
 when the third type argument is a render type and string [2] is not a render type. [invalid-render]
 
    renders_to_renders.js:60:25
-   60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+   60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -1053,7 +1053,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. You can onl
 when the third type argument is a render type and `React.Element` [2] is not a render type. [invalid-render]
 
    renders_to_renders.js:60:25
-   60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+   60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -1068,7 +1068,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. You can onl
 when the third type argument is a render type and `React.Portal` [2] is not a render type. [invalid-render]
 
    renders_to_renders.js:60:25
-   60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+   60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -1083,7 +1083,7 @@ Cannot use `React.Element` [1] as the type argument of renders type. You can onl
 when the third type argument is a render type and `$Iterable` [2] is not a render type. [invalid-render]
 
    renders_to_renders.js:60:25
-   60|   rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+   60|   rendersFoo as renders React.MixedElement; // type checks, but invalid-render
                                ^^^^^^^^^^^^^^^^^^ [1]
 
 References:
@@ -1290,7 +1290,7 @@ Cannot cast `mixedElement` to renders union type because `React.Element` [1] doe
 
 References:
    renders_to_renders.js:105:31
-   105|   declare const mixedElement: React$MixedElement;
+   105|   declare const mixedElement: React.MixedElement;
                                       ^^^^^^^^^^^^^^^^^^ [1]
    renders_to_renders.js:107:19
                           v--------

tests/render_types/renders_to_renders.js

@@ -57,7 +57,7 @@ declare const rendersBazOrBaz: renders (
     | null  // invalid-render
     | Bar
   ); // OK
-  rendersFoo as renders React$MixedElement; // type checks, but invalid-render
+  rendersFoo as renders React.MixedElement; // type checks, but invalid-render
   rendersQux as renders (Foo | Bar); // OK
   rendersQux as renders (Foo | Baz); // ERROR
   component A0() renders null { // invalid-render
@@ -102,7 +102,7 @@ declare const rendersBazOrBaz: renders (
   3 as renders (null | number); // type checks, but invalid-render
   declare const x: ExactReactElement_DEPRECATED<() => React$Node>;
   x as renders typeof x; // type checks, but invalid-render
-  declare const mixedElement: React$MixedElement;
+  declare const mixedElement: React.MixedElement;
   // The test below ensures repositioning does not hit unsoundness in speculation
   mixedElement as renders (
     | Foo
@@ -114,11 +114,11 @@ declare const rendersBazOrBaz: renders (
 
 /* Exit Structural Render Types */
 {
-  rendersFooOrBar as React$MixedElement; // OK
+  rendersFooOrBar as React.MixedElement; // OK
   rendersFooOrBar as empty; // ERROR
   rendersFooOrBar as React$Node; // OK
   rendersFooOrBar as React$Node; // OK
-  rendersNode as React$MixedElement; // invalid-render of rendersNode makes LHS any
+  rendersNode as React.MixedElement; // invalid-render of rendersNode makes LHS any
   rendersNode as React$Node; // OK
   declare const rendersNullOrNull: renders (null | null); // invalid-render
   rendersNullOrNull as null; // invalid-render of rendersNullOrNull makes LHS any
@@ -128,7 +128,7 @@ declare const rendersBazOrBaz: renders (
 
 /* Exit Nominal Render Types */
 {
-  rendersBaz as React$MixedElement; // OK
+  rendersBaz as React.MixedElement; // OK
   rendersBaz as empty; // ERROR
   rendersBaz.props; // ERROR
 }