Add initial batch of Dialog tests

src/lib/test-utils/TestRenderer.svelte

@@ -2,6 +2,8 @@
   type HandlerType = (event?: CustomEvent) => any;
   interface ComponentProps {
     onChange?: HandlerType;
+    onClose?: HandlerType;
+    onFocus?: HandlerType;
   }
   type SingleComponent = [SvelteComponent, ComponentProps, TestRendererProps];
   export type TestRendererProps =
@@ -9,22 +11,30 @@
     | string
     | SingleComponent
     | SingleComponent[];
-</script>
-
-<script lang="ts">
-  import type { SvelteComponent } from "svelte";
 
   function isSingleComponent(
     props: SingleComponent | SingleComponent[]
   ): props is SingleComponent {
     return Array.isArray(props) && !Array.isArray(props[0]);
   }
+</script>
+
+<script lang="ts">
+  import type { SvelteComponent } from "svelte";
+
   export let allProps: TestRendererProps;
+
+  let spreadProps = {};
   let onChange: HandlerType = () => {};
+  let onClose: HandlerType = () => {};
+  let onFocus: HandlerType = () => {};
   if (allProps && typeof allProps !== "string" && isSingleComponent(allProps)) {
-    if (allProps[1].onChange) {
-      onChange = allProps[1].onChange;
-    }
+    ({
+      onChange = onChange,
+      onClose = onClose,
+      onFocus = onFocus,
+      ...spreadProps
+    } = allProps[1] || {});
   }
 </script>
 
@@ -36,7 +46,13 @@
       <svelte:self allProps={childProps} />
     {/each}
   {:else}
-    <svelte:component this={allProps[0]} {...allProps[1]} on:change={onChange}>
+    <svelte:component
+      this={allProps[0]}
+      {...spreadProps}
+      on:change={onChange}
+      on:close={onClose}
+      on:focus={onFocus}
+    >
       <svelte:self allProps={allProps[2]} />
     </svelte:component>
   {/if}

src/lib/test-utils/suppress-console-logs.ts

@@ -0,0 +1,17 @@
+type FunctionPropertyNames<T> = {
+  [K in keyof T]: T[K] extends (...args: any[]) => any ? K : never
+}[keyof T] &
+  string
+
+export function suppressConsoleLogs<T extends unknown[]>(
+  cb: (...args: T) => unknown,
+  type: FunctionPropertyNames<typeof global.console> = 'error'
+) {
+  return (...args: T) => {
+    let spy = jest.spyOn(global.console, type).mockImplementation(jest.fn())
+
+    return new Promise<unknown>((resolve, reject) => {
+      Promise.resolve(cb(...args)).then(resolve, reject)
+    }).finally(() => spy.mockRestore())
+  }
+}