test(grid): add unit tests

tests/Grid/Grid.test.svelte

@@ -0,0 +1,44 @@
+<script lang="ts">
+  import { Grid } from "carbon-components-svelte";
+
+  export let condensed = false;
+  export let narrow = false;
+  export let fullWidth = false;
+  export let noGutter = false;
+  export let noGutterLeft = false;
+  export let noGutterRight = false;
+  export let padding = false;
+  export let as = false;
+</script>
+
+{#if as}
+  <Grid
+    {as}
+    {condensed}
+    {narrow}
+    {fullWidth}
+    {noGutter}
+    {noGutterLeft}
+    {noGutterRight}
+    {padding}
+    {...$$restProps}
+    let:props
+  >
+    <header {...props}>
+      <slot />
+    </header>
+  </Grid>
+{:else}
+  <Grid
+    {condensed}
+    {narrow}
+    {fullWidth}
+    {noGutter}
+    {noGutterLeft}
+    {noGutterRight}
+    {padding}
+    {...$$restProps}
+  >
+    <slot />
+  </Grid>
+{/if}

tests/Grid/Grid.test.ts

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+import { render } from "@testing-library/svelte";
+import Grid from "./Grid.test.svelte";
+
+describe("Grid", () => {
+  describe("Default", () => {
+    it("should render as a div by default", () => {
+      const { container } = render(Grid);
+      const grid = container.querySelector("div.bx--grid");
+      expect(grid).toHaveClass("bx--grid");
+    });
+
+    it("should support rest props", () => {
+      const { container } = render(Grid, {
+        props: {
+          "data-testid": "custom-grid",
+          "aria-label": "Grid layout",
+        },
+      });
+      const grid = container.querySelector("[data-testid='custom-grid']");
+      expect(grid).toHaveClass("bx--grid");
+      expect(grid).toHaveAttribute("aria-label", "Grid layout");
+    });
+  });
+
+  it("should render condensed variant", () => {
+    const { container } = render(Grid, {
+      props: { condensed: true },
+    });
+    const grid = container.querySelector("div.bx--grid");
+    expect(grid).toHaveClass("bx--grid--condensed");
+  });
+
+  it("should render narrow variant", () => {
+    const { container } = render(Grid, {
+      props: { narrow: true },
+    });
+    const grid = container.querySelector("div.bx--grid");
+    expect(grid).toHaveClass("bx--grid--narrow");
+  });
+
+  it("should render full width variant", () => {
+    const { container } = render(Grid, {
+      props: { fullWidth: true },
+    });
+    const grid = container.querySelector("div.bx--grid");
+    expect(grid).toHaveClass("bx--grid--full-width");
+  });
+
+  it("should render with no gutter", () => {
+    const { container } = render(Grid, {
+      props: { noGutter: true },
+    });
+    const grid = container.querySelector("div.bx--grid");
+    expect(grid).toHaveClass("bx--no-gutter");
+  });
+
+  it("should render with no left gutter", () => {
+    const { container } = render(Grid, {
+      props: { noGutterLeft: true },
+    });
+    const grid = container.querySelector("div.bx--grid");
+    expect(grid).toHaveClass("bx--no-gutter--left");
+  });
+
+  it("should render with no right gutter", () => {
+    const { container } = render(Grid, {
+      props: {
+        noGutterRight: true,
+      },
+    });
+    const grid = container.querySelector("div.bx--grid");
+    expect(grid).toHaveClass("bx--no-gutter--right");
+  });
+
+  it("should render with row padding", () => {
+    const { container } = render(Grid, {
+      props: {
+        padding: true,
+      },
+    });
+    const grid = container.querySelector("div.bx--grid");
+    expect(grid).toHaveClass("bx--row-padding");
+  });
+
+  it("should render as a custom element using the as prop", () => {
+    const { container } = render(Grid, { props: { as: true } });
+
+    const header = container.querySelector("header");
+    expect(header).toHaveClass("bx--grid");
+  });
+
+  it("should pass all variant classes and rest props to custom element", () => {
+    const { container } = render(Grid, {
+      props: {
+        as: true,
+        condensed: true,
+        narrow: true,
+        fullWidth: true,
+        noGutter: true,
+        padding: true,
+        "data-testid": "custom-header",
+        "aria-label": "Custom header grid",
+      },
+    });
+    const header = container.querySelector("[data-testid='custom-header']");
+    expect(header).toHaveClass(
+      "bx--grid",
+      "bx--grid--condensed",
+      "bx--grid--narrow",
+      "bx--grid--full-width",
+      "bx--no-gutter",
+      "bx--row-padding",
+    );
+    expect(header).toHaveAttribute("aria-label", "Custom header grid");
+  });
+
+  it("should combine multiple variant classes", () => {
+    const { container } = render(Grid, {
+      props: {
+        condensed: true,
+        narrow: true,
+        noGutterLeft: true,
+        noGutterRight: true,
+        padding: true,
+      },
+    });
+    const grid = container.querySelector("div.bx--grid");
+    expect(grid).toHaveClass(
+      "bx--grid",
+      "bx--grid--condensed",
+      "bx--grid--narrow",
+      "bx--no-gutter--left",
+      "bx--no-gutter--right",
+      "bx--row-padding",
+    );
+  });
+});