add box plot jest/rtl tests

test/jest/victory-box-plot/victory-box.plot.test.js

@@ -0,0 +1,178 @@
+/*eslint-disable react/prop-types */
+import React from "react";
+import { render, screen } from "@testing-library/react";
+import { VictoryBoxPlot } from "victory-box-plot";
+import { LineSegment, Whisker, Border } from "victory-core";
+
+const TEST_GROUP_ID = "test-group-id";
+const dataset = [
+  { x: 1, min: 1, max: 18, median: 8, q1: 5, q3: 15 },
+  { x: 2, min: 4, max: 20, median: 10, q1: 7, q3: 15 },
+  { x: 3, min: 3, max: 12, median: 6, q1: 5, q3: 10 }
+];
+
+const TestGroup = ({ children }) => {
+  return <g data-testid={TEST_GROUP_ID}>{children}</g>;
+};
+
+const renderWithTestGroup = (data = dataset) => {
+  const { container } = render(
+    <VictoryBoxPlot data={data} groupComponent={<TestGroup />} />
+  );
+  const groups = screen.getAllByTestId(TEST_GROUP_ID);
+
+  return { container, groups };
+};
+
+describe("components/victory-box-plot", () => {
+  describe("default component rendering", () => {
+    it("accepts user props", () => {
+      render(
+        <VictoryBoxPlot data-testid="victory-boxplot" aria-label="Chart" />
+      );
+
+      expect(screen.getByLabelText("Chart")).toBeDefined();
+    });
+
+    it("renders an svg with the correct width and height", () => {
+      const { container } = render(<VictoryBoxPlot data={dataset} />);
+      const svg = container.querySelector("svg");
+      expect(svg.getAttribute("style")).toContain("width: 100%; height: 100%");
+    });
+
+    it("renders an svg with the correct viewBox", () => {
+      const { container } = render(<VictoryBoxPlot data={dataset} />);
+      const svg = container.querySelector("svg");
+      const viewBoxValue = `0 0 ${450} ${300}`;
+      expect(svg.getAttribute("viewBox")).toEqual(viewBoxValue);
+    });
+
+    it("renders 3 points", () => {
+      const { container } = render(<VictoryBoxPlot data={dataset} />);
+      const points = container.querySelectorAll("rect");
+      // two boxes per point
+      expect(points).toHaveLength(6);
+    });
+  });
+
+  it("does not render data with null x or y values", () => {
+    const data = [
+      { x: 1, y: 2 },
+      { x: 1, y: 3 },
+      { x: null, y: 2 },
+      { x: null, y: 3 },
+      { x: 2, y: null },
+      { x: 2, y: null }
+    ];
+    const { groups } = renderWithTestGroup(data);
+
+    expect(groups).toHaveLength(1);
+  });
+
+  it("does not render data with null y values when given an array", () => {
+    const data = [
+      { x: 1, y: [1, 2, 3] },
+      { x: 1, y: [null, 2, 5] }
+    ];
+
+    const { groups } = renderWithTestGroup(data);
+
+    expect(groups).toHaveLength(1);
+  });
+
+  it("does not render data with null min, max, median, q1, or q3 values", () => {
+    const data = [
+      { x: 1, min: 2, median: 5, max: 10, q1: 3, q3: 7 },
+      { x: 2, min: null, median: 4, max: 9, q1: 3, q3: 6 },
+      { x: 3, min: 1, median: null, max: 12, q1: 4, q3: 10 },
+      { x: 4, min: 3, median: 9, max: null, q1: 5, q3: 13 },
+      { x: 5, min: 2, median: 8, max: 15, q1: null, q3: 12 },
+      { x: 5, min: 2, median: 10, max: 20, q1: 8, q3: null }
+    ];
+
+    const { groups } = renderWithTestGroup(data);
+
+    expect(groups).toHaveLength(1);
+  });
+
+  describe("accessibility", () => {
+    const buildLabel = (a, b) => `First value: ${a} Second value: ${b}`;
+    it("adds an aria role to each point in the series", () => {
+      const { container } = render(<VictoryBoxPlot data={dataset} />);
+
+      container.querySelectorAll("rect").forEach((box) => {
+        expect(box.getAttribute("role")).toEqual("presentation");
+      });
+    });
+
+    it("applies aria-label to whisker primitive", () => {
+      render(
+        <VictoryBoxPlot
+          data={dataset}
+          maxComponent={
+            <Whisker
+              ariaLabel={({ datum }) => buildLabel(datum.x, datum._max)}
+              tabIndex={({ index }) => index + 1}
+            />
+          }
+        />
+      );
+
+      dataset
+        .map(({ x, max }) => buildLabel(x, max))
+        .forEach((label, index) => {
+          const [labeledWhisker] = screen.getAllByLabelText(label);
+          expect(labeledWhisker).toBeDefined();
+          expect(labeledWhisker.getAttribute("tabindex")).toEqual(
+            `${index + 1}`
+          );
+        });
+    });
+
+    it("applies aria-label to border primitive", () => {
+      render(
+        <VictoryBoxPlot
+          data={dataset}
+          q3Component={
+            <Border
+              ariaLabel={({ datum }) => buildLabel(datum.x, datum._q3)}
+              tabIndex={({ index }) => index + 1}
+            />
+          }
+        />
+      );
+
+      dataset
+        .map(({ x, q3 }) => buildLabel(x, q3))
+        .forEach((label, index) => {
+          const labeledBorder = screen.getByLabelText(label);
+          expect(labeledBorder).toBeDefined();
+          expect(labeledBorder.getAttribute("tabindex")).toEqual(
+            `${index + 1}`
+          );
+        });
+    });
+
+    it("applies tabIndex and aria-label to line-segmnet primitive", () => {
+      render(
+        <VictoryBoxPlot
+          data={dataset}
+          medianComponent={
+            <LineSegment
+              ariaLabel={({ datum }) => buildLabel(datum.x, datum._median)}
+              tabIndex={({ index }) => index + 1}
+            />
+          }
+        />
+      );
+
+      dataset
+        .map(({ x, median }) => buildLabel(x, median))
+        .forEach((label, index) => {
+          const labeledLine = screen.getByLabelText(label);
+          expect(labeledLine).toBeDefined();
+          expect(labeledLine.getAttribute("tabindex")).toEqual(`${index + 1}`);
+        });
+    });
+  });
+});