fix: ensure that event data can be an array, number, boolean or null (#281)

The schema incorrectly limits data values to only object and string. This is
incorrect, since JSON can be an array, boolean, a single number or null as well.

This commit modifies the schema to allow for array, boolean and null, and adds
tests.

Fixes: https://github.com/cloudevents/sdk-javascript/issues/280

Signed-off-by: Lance Ball <lball@redhat.com>

src/event/schemas.ts

@@ -10,7 +10,7 @@ export const schemaV1 = {
       type: "string",
     },
     data: {
-      type: ["object", "string"],
+      type: ["object", "string", "array", "number", "boolean", "null"],
     },
     data_base64: {
       type: "string",
@@ -89,7 +89,7 @@ export const schemaV03 = {
       type: "string",
     },
     data: {
-      type: ["object", "string"],
+      type: ["object", "string", "array", "number", "boolean", "null"],
     },
     event: {
       properties: {

test/integration/cloud_event_test.ts

@@ -101,6 +101,38 @@ describe("A 1.0 CloudEvent", () => {
     expect(ce.data).to.deep.equal({ lunch: "tacos" });
   });
 
+  it("can be constructed with data as an Array", () => {
+    const ce = new CloudEvent({
+      ...fixture,
+      data: [{ lunch: "tacos" }, { supper: "sushi" }],
+    });
+    expect(ce.data).to.deep.equal([{ lunch: "tacos" }, { supper: "sushi" }]);
+  });
+
+  it("can be constructed with data as a number", () => {
+    const ce = new CloudEvent({
+      ...fixture,
+      data: 100,
+    });
+    expect(ce.data).to.equal(100);
+  });
+
+  it("can be constructed with null data", () => {
+    const ce = new CloudEvent({
+      ...fixture,
+      data: null,
+    });
+    expect(ce.data).to.equal(null);
+  });
+
+  it("can be constructed with data as a boolean", () => {
+    const ce = new CloudEvent({
+      ...fixture,
+      data: true,
+    });
+    expect(ce.data).to.be.true;
+  });
+
   it("can be constructed with extensions", () => {
     const extensions = {
       extensionkey: "extension-value",