Add tests where variable declarations might not be in a statement array

Author: ngtr6788

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

@@ -0,0 +1,7 @@
+export default {
+  props: {
+    a: 13 
+  },
+
+  html: '<p>169</p>'
+};

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

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+<script>
+  export let a;
+  let i = 0; 
+  do {
+    var b = a * i;
+  } while (++i <= a);
+</script>
+
+<p>{b}</p>

test/runtime/samples/var-store-in-do-while-loop/_config.js

@@ -0,0 +1,3 @@
+export default {
+  html: '<p>3</p><p>5</p>'
+};

test/runtime/samples/var-store-in-do-while-loop/main.svelte

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+<script>
+  import { writable } from "svelte/store";
+
+  do {
+    var a = writable(3); 
+  } while (false);
+
+  do var b = writable(5); while (false);
+
+  var x = $a;
+  var y = $b;
+</script>
+
+<p>{x}</p>
+<p>{y}</p>

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

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+export default {
+  html: '<p>3</p><p>5</p>'
+};

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

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+<script>
+  import { writable } from "svelte/store";
+
+  for (let i = 0; i < 1; i += 1) {
+    var a = writable(3);
+  }
+
+  for (let i = 0; i < 1; i += 1)
+    var b = writable(5);
+
+  var x = $a;
+  var y = $b;
+</script>
+
+<p>{x}</p>
+<p>{y}</p>

test/runtime/samples/var-store-in-if/_config.js

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+export default {
+  html: '<p>3</p><p>5</p>'
+};

test/runtime/samples/var-store-in-if/main.svelte

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+<script>
+  import { writable } from "svelte/store";
+
+  if (true) {
+    var a = writable(3);
+  } else {
+		var a = writable(4);
+	}
+
+  if (false)
+    var b = writable(2);
+	else
+		var b = writable(5);
+
+  var x = $a;
+  var y = $b;
+</script>
+
+<p>{x}</p>
+<p>{y}</p>

test/runtime/samples/var-store-in-labeled-statement/_config.js

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+export default {
+  html: '<p>3</p><p>5</p>'
+};

test/runtime/samples/var-store-in-labeled-statement/main.svelte

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+<script>
+  import { writable } from "svelte/store";
+
+	yes: {
+	  var a = writable(3);
+  }
+
+  no: var b = writable(5);
+
+  var x = $a;
+  var y = $b;
+</script>
+
+<p>{x}</p>
+<p>{y}</p>