expect: Improve report when matcher fails, part 16 (#8306)

* expect: Improve report when matcher fails, part 16

* Update CHANGELOG.md

* Replace noun with verb: serializes to the same string

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### Features
 
 - `[expect]` Improve report when matcher fails, part 15 ([#8281](https://github.com/facebook/jest/pull/8281))
+- `[expect]` Improve report when matcher fails, part 16 ([#8306](https://github.com/facebook/jest/pull/8306))
 - `[jest-runner]` Pass docblock pragmas to TestEnvironment constructor ([#8320](https://github.com/facebook/jest/pull/8320))
 
 ### Fixes

e2e/__tests__/__snapshots__/failures.test.ts.snap

@@ -260,7 +260,7 @@ FAIL __tests__/testMacro.test.js
 
   ● use some imported macro to make assertion
 
-    expect(received).toEqual(expected)
+    expect(received).toEqual(expected) // deep equality
 
     Expected: 2
     Received: 1
@@ -286,9 +286,7 @@ FAIL __tests__/asyncFailures.test.js
 
   ● resolve, but fail
 
-    expect(received).toEqual(expected)
-
-    Difference:
+    expect(received).resolves.toEqual(expected) // deep equality
 
     - Expected
     + Received
@@ -310,9 +308,7 @@ FAIL __tests__/asyncFailures.test.js
 
   ● reject, but fail
 
-    expect(received).toEqual(expected)
-
-    Difference:
+    expect(received).rejects.toEqual(expected) // deep equality
 
     - Expected
     + Received

packages/expect/src/__tests__/__snapshots__/extend.test.js.snap

@@ -1,9 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`defines asymmetric unary matchers 1`] = `
-"<dim>expect(</><red>received</><dim>).toEqual(</><green>expected</><dim>)</>
-
-Difference:
+"<dim>expect(</><red>received</><dim>).</>toEqual<dim>(</><green>expected</><dim>) // deep equality</>
 
 <green>- Expected</>
 <red>+ Received</>
@@ -15,9 +13,7 @@ Difference:
 `;
 
 exports[`defines asymmetric unary matchers that can be prefixed by not 1`] = `
-"<dim>expect(</><red>received</><dim>).toEqual(</><green>expected</><dim>)</>
-
-Difference:
+"<dim>expect(</><red>received</><dim>).</>toEqual<dim>(</><green>expected</><dim>) // deep equality</>
 
 <green>- Expected</>
 <red>+ Received</>
@@ -29,9 +25,7 @@ Difference:
 `;
 
 exports[`defines asymmetric variadic matchers 1`] = `
-"<dim>expect(</><red>received</><dim>).toEqual(</><green>expected</><dim>)</>
-
-Difference:
+"<dim>expect(</><red>received</><dim>).</>toEqual<dim>(</><green>expected</><dim>) // deep equality</>
 
 <green>- Expected</>
 <red>+ Received</>
@@ -43,9 +37,7 @@ Difference:
 `;
 
 exports[`defines asymmetric variadic matchers that can be prefixed by not 1`] = `
-"<dim>expect(</><red>received</><dim>).toEqual(</><green>expected</><dim>)</>
-
-Difference:
+"<dim>expect(</><red>received</><dim>).</>toEqual<dim>(</><green>expected</><dim>) // deep equality</>
 
 <green>- Expected</>
 <red>+ Received</>