Rename doesExist() to exists() for header assertions

spring-test/src/main/java/org/springframework/test/web/reactive/server/HeaderAssertions.java

@@ -77,7 +77,7 @@ public class HeaderAssertions {
 	 * Expect that the header with the given name is present.
 	 * @since 5.0.3
 	 */
-	public WebTestClient.ResponseSpec doesExist(String name) {
+	public WebTestClient.ResponseSpec exists(String name) {
 		if (!getHeaders().containsKey(name)) {
 			String message = getMessage(name) + " does not exist";
 			this.exchangeResult.assertWithDiagnostics(() -> fail(message));

spring-test/src/main/java/org/springframework/test/web/servlet/result/HeaderResultMatchers.java

@@ -91,10 +91,10 @@ public class HeaderResultMatchers {
 	}
 
 	/**
-	 * Assert that the named response header does exist.
+	 * Assert that the named response header exists.
 	 * @since 5.0.3
 	 */
-	public ResultMatcher doesExist(final String name) {
+	public ResultMatcher exists(final String name) {
 		return result -> assertTrue("Response should contain header '" + name + "'",
 				result.getResponse().containsHeader(name));
 	}

spring-test/src/test/java/org/springframework/test/web/reactive/server/HeaderAssertionTests.java

@@ -126,16 +126,16 @@ public class HeaderAssertionTests {
 	}
 
 	@Test
-	public void doesExist() {
+	public void exists() {
 		HttpHeaders headers = new HttpHeaders();
 		headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
 		HeaderAssertions assertions = headerAssertions(headers);
 
 		// Success
-		assertions.doesExist("Content-Type");
+		assertions.exists("Content-Type");
 
 		try {
-			assertions.doesExist("Framework");
+			assertions.exists("Framework");
 			fail("Header should not exist");
 		}
 		catch (AssertionError error) {

spring-test/src/test/java/org/springframework/test/web/servlet/samples/standalone/resultmatchers/HeaderAssertionTests.java

@@ -144,6 +144,16 @@ public class HeaderAssertionTests {
 		}
 	}
 
+	@Test
+	public void exists() throws Exception {
+		this.mockMvc.perform(get("/persons/1")).andExpect(header().exists(LAST_MODIFIED));
+	}
+
+	@Test(expected = AssertionError.class)
+	public void existsFail() throws Exception {
+		this.mockMvc.perform(get("/persons/1")).andExpect(header().exists("X-Custom-Header"));
+	}
+
 	@Test  // SPR-10771
 	public void doesNotExist() throws Exception {
 		this.mockMvc.perform(get("/persons/1")).andExpect(header().doesNotExist("X-Custom-Header"));
@@ -154,16 +164,6 @@ public class HeaderAssertionTests {
 		this.mockMvc.perform(get("/persons/1")).andExpect(header().doesNotExist(LAST_MODIFIED));
 	}
 
-	@Test
-	public void doesExist() throws Exception {
-		this.mockMvc.perform(get("/persons/1")).andExpect(header().doesExist(LAST_MODIFIED));
-	}
-
-	@Test(expected = AssertionError.class)
-	public void doesExistFail() throws Exception {
-		this.mockMvc.perform(get("/persons/1")).andExpect(header().doesExist("X-Custom-Header"));
-	}
-
 	@Test
 	public void stringWithIncorrectResponseHeaderValue() throws Exception {
 		assertIncorrectResponseHeader(header().string(LAST_MODIFIED, secondLater), secondLater);