feat(jest-reporters): pass reporterContext to custom reporter constructors as third argument

packages/jest-config/src/__tests__/__snapshots__/normalize.test.ts.snap

@@ -200,6 +200,74 @@ exports[`preset throws when preset not found 1`] = `
 <red></>"
 `;
 
+exports[`reporters throws an error if first value in the tuple is not a string 1`] = `
+"<red><bold><bold>● </><bold>Reporter Validation Error</>:</>
+<red></>
+<red>  Unexpected value for Path at index 0 of reporter at index 0</>
+<red>  Expected:</>
+<red>    <bold><red>string</><red></></>
+<red>  Got:</>
+<red>    <bold><green>number</><red></></>
+<red>  Reporter configuration:</>
+<red>    <bold><green>[</><red></></>
+<red><bold><green>      123</><red></></>
+<red><bold><green>    ]</><red></></>
+<red></>
+<red>  <bold>Configuration Documentation:</></>
+<red>  https://jestjs.io/docs/configuration</>
+<red></>"
+`;
+
+exports[`reporters throws an error if second value in the tuple is not an object 1`] = `
+"<red><bold><bold>● </><bold>Reporter Validation Error</>:</>
+<red></>
+<red>  Unexpected value for Reporter Configuration at index 1 of reporter at index 0</>
+<red>  Expected:</>
+<red>    <bold><red>object</><red></></>
+<red>  Got:</>
+<red>    <bold><green>boolean</><red></></>
+<red>  Reporter configuration:</>
+<red>    <bold><green>[</><red></></>
+<red><bold><green>      "some-reporter",</><red></></>
+<red><bold><green>      true</><red></></>
+<red><bold><green>    ]</><red></></>
+<red></>
+<red>  <bold>Configuration Documentation:</></>
+<red>  https://jestjs.io/docs/configuration</>
+<red></>"
+`;
+
+exports[`reporters throws an error if second value is missing in the tuple 1`] = `
+"<red><bold><bold>● </><bold>Reporter Validation Error</>:</>
+<red></>
+<red>  Unexpected value for Reporter Configuration at index 1 of reporter at index 0</>
+<red>  Expected:</>
+<red>    <bold><red>object</><red></></>
+<red>  Got:</>
+<red>    <bold><green>undefined</><red></></>
+<red>  Reporter configuration:</>
+<red>    <bold><green>[</><red></></>
+<red><bold><green>      "some-reporter"</><red></></>
+<red><bold><green>    ]</><red></></>
+<red></>
+<red>  <bold>Configuration Documentation:</></>
+<red>  https://jestjs.io/docs/configuration</>
+<red></>"
+`;
+
+exports[`reporters throws an error if value is neither string nor array 1`] = `
+"<red><bold><bold>● </><bold>Reporter Validation Error</>:</>
+<red></>
+<red>  Reporter at index 0 must be of type:</>
+<red>    <bold><green>array or string</><red></></>
+<red>  but instead received:</>
+<red>    <bold><red>number</><red></></>
+<red></>
+<red>  <bold>Configuration Documentation:</></>
+<red>  https://jestjs.io/docs/configuration</>
+<red></>"
+`;
+
 exports[`rootDir throws if the options is missing a rootDir property 1`] = `
 "<red><bold><bold>● </><bold>Validation Error</>:</>
 <red></>

packages/jest-config/src/__tests__/normalize.test.ts

@@ -351,6 +351,58 @@ describe('reporters', () => {
       ['jest-junit', {outputName: 'report.xml'}],
     ]);
   });
+
+  it('throws an error if value is neither string nor array', async () => {
+    expect.assertions(1);
+    await expect(
+      normalize(
+        {
+          reporters: [123],
+          rootDir: '/root/',
+        },
+        {} as Config.Argv,
+      ),
+    ).rejects.toThrowErrorMatchingSnapshot();
+  });
+
+  it('throws an error if first value in the tuple is not a string', async () => {
+    expect.assertions(1);
+    await expect(
+      normalize(
+        {
+          reporters: [[123]],
+          rootDir: '/root/',
+        },
+        {} as Config.Argv,
+      ),
+    ).rejects.toThrowErrorMatchingSnapshot();
+  });
+
+  it('throws an error if second value is missing in the tuple', async () => {
+    expect.assertions(1);
+    await expect(
+      normalize(
+        {
+          reporters: [['some-reporter']],
+          rootDir: '/root/',
+        },
+        {} as Config.Argv,
+      ),
+    ).rejects.toThrowErrorMatchingSnapshot();
+  });
+
+  it('throws an error if second value in the tuple is not an object', async () => {
+    expect.assertions(1);
+    await expect(
+      normalize(
+        {
+          reporters: [['some-reporter', true]],
+          rootDir: '/root/',
+        },
+        {} as Config.Argv,
+      ),
+    ).rejects.toThrowErrorMatchingSnapshot();
+  });
 });
 
 describe('transform', () => {