[ggj][codegen][test] fix: handle floating-point types for test codege…

…n assertEquals (#544)

* fix: align resname ctors with superclass variants

* fix: avoid type collisions - refactor {Concrete,Vapor}Ref into AstNodes

* fix: better message null checks in Parser

* fix: map proto.Empty RPC types to void in ServiceClient

* fix: improve import(shortName) state-keeping in ImportWriterVisitor

* fix: fix stub pkg for all ServiceSettingsStub usages

* fix: handle older protos with javaMultipleFiles=false

* fix: gate isPaged on all fields for monolith back-compat

* fix: fail early if bazel lacks a grpc_service_config.json file

* fix: add Bazel handling for lack of resname helper classes

* fix: reverse conditional

* fix: handle floating-point types for test codegen assertEquals

src/main/java/com/google/api/generator/gapic/composer/ServiceClientTestClassComposer.java

@@ -851,11 +851,23 @@ private static MethodDefinition createRpcTestMethod(
                     .build();
         Expr expectedFieldExpr = checkExprFn.apply(requestVarExpr);
         Expr actualFieldExpr = checkExprFn.apply(actualRequestVarExpr);
+        List<Expr> assertEqualsArguments = new ArrayList<>();
+        assertEqualsArguments.add(expectedFieldExpr);
+        assertEqualsArguments.add(actualFieldExpr);
+        if (TypeNode.isFloatingPointType(field.type())) {
+          boolean isFloat = field.type().equals(TypeNode.FLOAT);
+          assertEqualsArguments.add(
+              ValueExpr.withValue(
+                  PrimitiveValue.builder()
+                      .setType(isFloat ? TypeNode.FLOAT : TypeNode.DOUBLE)
+                      .setValue(String.format("0.0001%s", isFloat ? "f" : ""))
+                      .build()));
+        }
         methodExprs.add(
             MethodInvocationExpr.builder()
                 .setStaticReferenceType(STATIC_TYPES.get("Assert"))
                 .setMethodName("assertEquals")
-                .setArguments(expectedFieldExpr, actualFieldExpr)
+                .setArguments(assertEqualsArguments)
                 .build());
       }
     } else {