yeet

node_modules/react-native/Libraries/StyleSheet/__flowtests__/StyleSheet-flowtest.js

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+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+'use strict';
+
+const StyleSheet = require('../StyleSheet');
+
+import type {ImageStyleProp, TextStyleProp} from '../StyleSheet';
+const imageStyle = {tintColor: 'rgb(0, 0, 0)'};
+const textStyle = {color: 'rgb(0, 0, 0)'};
+
+module.exports = {
+  testGoodCompose() {
+    (StyleSheet.compose(
+      imageStyle,
+      imageStyle,
+    ): ImageStyleProp);
+
+    (StyleSheet.compose(
+      textStyle,
+      textStyle,
+    ): TextStyleProp);
+
+    (StyleSheet.compose(
+      null,
+      null,
+    ): TextStyleProp);
+
+    (StyleSheet.compose(
+      textStyle,
+      null,
+    ): TextStyleProp);
+
+    (StyleSheet.compose(
+      textStyle,
+      Math.random() < 0.5 ? textStyle : null,
+    ): TextStyleProp);
+
+    (StyleSheet.compose(
+      [textStyle],
+      null,
+    ): TextStyleProp);
+
+    (StyleSheet.compose(
+      [textStyle],
+      null,
+    ): TextStyleProp);
+
+    (StyleSheet.compose(
+      [textStyle],
+      [textStyle],
+    ): TextStyleProp);
+  },
+
+  testBadCompose() {
+    // $FlowExpectedError - Incompatible type.
+    (StyleSheet.compose(
+      textStyle,
+      textStyle,
+    ): ImageStyleProp);
+
+    // $FlowExpectedError - Incompatible type.
+    (StyleSheet.compose(
+      // $FlowExpectedError - Incompatible type.
+      [textStyle],
+      null,
+    ): ImageStyleProp);
+
+    // $FlowExpectedError - Incompatible type.
+    (StyleSheet.compose(
+      Math.random() < 0.5 ? textStyle : null,
+      null,
+    ): ImageStyleProp);
+  },
+};