test(prefer-svelte-reactivity): added tests for returned variables

Author: marekdedic

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/arrow-function-return01-errors.yaml

@@ -0,0 +1,4 @@
+- message: Found a mutable instance of the built-in Set class. Use SvelteSet instead.
+  line: 3
+  column: 20
+  suggestions: null

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/arrow-function-return01-input.svelte

@@ -0,0 +1,8 @@
+<script>
+	const fn = () => {
+		const variable = new Set([1, 2, 1, 3, 3]);
+		return variable;
+	}
+</script>
+
+{fn().has(42)}

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/arrow-function-return02-errors.yaml

@@ -0,0 +1,4 @@
+- message: Found a mutable instance of the built-in Set class. Use SvelteSet instead.
+  line: 3
+  column: 10
+  suggestions: null

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/arrow-function-return02-input.svelte

@@ -0,0 +1,7 @@
+<script>
+	const fn = () => {
+		return new Set([1, 2, 1, 3, 3]);
+	}
+</script>
+
+{fn().has(42)}

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/function-return01-errors.yaml

@@ -0,0 +1,4 @@
+- message: Found a mutable instance of the built-in Set class. Use SvelteSet instead.
+  line: 3
+  column: 20
+  suggestions: null

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/function-return01-input.svelte

@@ -0,0 +1,8 @@
+<script>
+	function fn() {
+		const variable = new Set([1, 2, 1, 3, 3]);
+		return variable;
+	}
+</script>
+
+{fn().has(42)}

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/function-return02-errors.yaml

@@ -0,0 +1,4 @@
+- message: Found a mutable instance of the built-in Set class. Use SvelteSet instead.
+  line: 3
+  column: 10
+  suggestions: null

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/function-return02-input.svelte

@@ -0,0 +1,7 @@
+<script>
+	function fn() {
+		return new Set([1, 2, 1, 3, 3]);
+	}
+</script>
+
+{fn().has(42)}

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/method-return01-errors.yaml

@@ -0,0 +1,4 @@
+- message: Found a mutable instance of the built-in Set class. Use SvelteSet instead.
+  line: 4
+  column: 21
+  suggestions: null

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/invalid/method-return01-input.svelte

@@ -0,0 +1,12 @@
+<script>
+	class A {
+		fn() {
+			const variable = new Set([1, 2, 1, 3, 3]);
+			return variable;
+		}
+	}
+
+	const a = new A();
+</script>
+
+{a.fn().has(42)}