Add 3 findNode methods - by name, comp and instance

1. By Component name
2. By Component (Class Or Function) reference
3. By Component (ClassComponent) instance reference

src/findNode.ts

@@ -0,0 +1,91 @@
+import { FiberNode } from "./mocked-types";
+import { isNotHtmlLike } from "./utils";
+
+function findNodeByComponentName(
+  node: FiberNode | null,
+  expectedName: string
+): FiberNode | null {
+  if (node === null) {
+    return null;
+  }
+
+  if (isNotHtmlLike(node) && node.type.name === expectedName) {
+    console.debug("Found node " + node);
+    return node;
+  }
+
+  {
+    const returnVal = findNodeByComponentName(node.child, expectedName);
+    if (returnVal !== null) {
+      return returnVal;
+    }
+  }
+  {
+    const returnVal = findNodeByComponentName(node.sibling, expectedName);
+    if (returnVal !== null) {
+      return returnVal;
+    }
+  }
+
+  return null;
+}
+
+function findNodeByComponent(
+  node: FiberNode | null,
+  expectedClassOrFunction: React.ComponentType
+): FiberNode | null {
+  if (node === null) {
+    return null;
+  }
+
+  if (isNotHtmlLike(node) && node.type === expectedClassOrFunction) {
+    console.debug("Found node " + node);
+    return node;
+  }
+
+  {
+    const returnVal = findNodeByComponent(node.child, expectedClassOrFunction);
+    if (returnVal !== null) {
+      return returnVal;
+    }
+  }
+  {
+    const returnVal = findNodeByComponent(node.sibling, expectedClassOrFunction);
+    if (returnVal !== null) {
+      return returnVal;
+    }
+  }
+
+  return null;
+}
+
+function findNodeByComponentInstance(
+  node: FiberNode | null,
+  expectedClassInstance: React.Component
+): FiberNode | null {
+  if (node === null) {
+    return null;
+  }
+
+  if (isNotHtmlLike(node) && node.stateNode === expectedClassInstance) {
+    console.debug("Found node " + node);
+    return node;
+  }
+
+  {
+    const returnVal = findNodeByComponentInstance(node.child, expectedClassInstance);
+    if (returnVal !== null) {
+      return returnVal;
+    }
+  }
+  {
+    const returnVal = findNodeByComponentInstance(node.sibling, expectedClassInstance);
+    if (returnVal !== null) {
+      return returnVal;
+    }
+  }
+
+  return null;
+}
+
+export { findNodeByComponentName, findNodeByComponent, findNodeByComponentInstance };