test: Address SonarQube findings on RequestTest and RequestContextTest

- Use Request::bytes method reference instead of () -> Request.bytes()
  in assertThrows.
- Chain assertj assertions: isEqualTo(b).hasSameHashCodeAs(b),
  isNotEqualTo(null).isNotEqualTo("not a context").

Author: thced

src/test/java/com/retailsvc/http/RequestTest.java

@@ -39,6 +39,6 @@ void readsBoundContext() throws Exception {
 
   @Test
   void readingOutsideScopeThrows() {
-    assertThrows(NoSuchElementException.class, () -> Request.bytes());
+    assertThrows(NoSuchElementException.class, Request::bytes);
   }
 }

src/test/java/com/retailsvc/http/internal/RequestContextTest.java

@@ -25,8 +25,7 @@ void equalsIsReflexive() {
   void equalsTreatsByteArraysStructurally() {
     RequestContext a = context(BODY_A, "p", "op", Map.of("k", "v"));
     RequestContext b = context(BODY_A_COPY, "p", "op", Map.of("k", "v"));
-    assertThat(a).isEqualTo(b);
-    assertThat(a).hasSameHashCodeAs(b);
+    assertThat(a).isEqualTo(b).hasSameHashCodeAs(b);
   }
 
   @Test
@@ -60,8 +59,7 @@ void equalsRejectsDifferentPathParameters() {
   @Test
   void equalsRejectsNullAndOtherTypes() {
     RequestContext c = context(BODY_A, "p", "op", Map.of());
-    assertThat(c).isNotEqualTo(null);
-    assertThat(c).isNotEqualTo("not a context");
+    assertThat(c).isNotEqualTo(null).isNotEqualTo("not a context");
   }
 
   @Test