Add tests for var in blocks

Author: ngtr6788

test/js/samples/var-in-block/expected.js

@@ -0,0 +1,46 @@
+/* generated by Svelte vX.Y.Z */
+import {
+	SvelteComponent,
+	detach,
+	init,
+	insert,
+	noop,
+	safe_not_equal,
+	text
+} from "svelte/internal";
+
+function create_fragment(ctx) {
+	let t;
+
+	return {
+		c() {
+			t = text(/*one*/ ctx[0]);
+		},
+		m(target, anchor) {
+			insert(target, t, anchor);
+		},
+		p: noop,
+		i: noop,
+		o: noop,
+		d(detaching) {
+			if (detaching) detach(t);
+		}
+	};
+}
+
+function instance($$self) {
+	{
+		var one = 1;
+	}
+
+	return [one];
+}
+
+class Component extends SvelteComponent {
+	constructor(options) {
+		super();
+		init(this, options, instance, create_fragment, safe_not_equal, {});
+	}
+}
+
+export default Component;

test/js/samples/var-in-block/input.svelte

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+<script>
+	{
+		var one = 1;
+	}
+</script>
+
+{one}

test/runtime/samples/var-in-block/_config.js

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+export default {
+  html: '<p>12345</p><p>67890</p>'
+}

test/runtime/samples/var-in-block/main.svelte

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+<script>
+  {
+    var foo = 12345;
+    var bar = 67890;
+  }
+</script>
+
+<p>{foo}</p>
+<p>{bar}</p>

test/runtime/samples/var-in-for-in-loop/_config.js

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+export default {
+  html: '<p>0</p><p>2</p><p>4</p><p>6</p><p>8</p>'
+}

test/runtime/samples/var-in-for-in-loop/main.svelte

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+<script>
+  var array = [0, 1, 2, 3, 4];
+  for (var i in array) {
+    array[i] = 2 * i;
+  }
+</script>
+
+{#each array as a}
+  <p>{a}</p>
+{/each}

test/runtime/samples/var-in-for-loop/_config.js

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+export default {
+  html: '<p>0</p><p>1</p><p>2</p><p>3</p><p>4</p>'
+}

test/runtime/samples/var-in-for-loop/main.svelte

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+<script>
+  var array = [];
+  for (var i = 0; i < 5; i++) {
+    array[i] = i;
+  }
+</script>
+
+{#each array as a}
+  <p>{a}</p>
+{/each}

test/runtime/samples/var-in-function/_config.js

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+export default {
+  html: '<button></button><p>0</p>',
+
+  async test({ assert, target, window }) {
+    const button = target.querySelector('button');
+    const clickEvent = new window.MouseEvent('click');
+
+    await button.dispatchEvent(clickEvent);
+    assert.htmlEqual(target.innerHTML, '<button></button><p>4</p>');
+  }
+};

test/runtime/samples/var-in-function/main.svelte

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+<script>
+  let foo = 0;
+  function handleClick() {
+    var random = 4;
+    foo += random;
+  }
+</script>
+
+<button on:click={handleClick} />
+<p>{foo}</p>