[spirv-writer] Stub out more accessor tests

This CL adds more tests to be written for the accessor code.

Bug: tint:5
Change-Id: Ie3a349bfb372dc7f8069d2117bf4fdd48f2da07a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/20621
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

src/writer/spirv/builder_accessor_expression_test.cc

@@ -509,14 +509,26 @@ TEST_F(BuilderTest, MemberAccessor_Swizzle_Single) {
 )");
 }
 
-TEST_F(BuilderTest, DISABLED_MemberAccessor_Swizzle_Multiple) {
+TEST_F(BuilderTest, DISABLED_MemberAccessor_Swizzle_MultipleNames) {
   // vec.yx
 }
 
-TEST_F(BuilderTest, DISABLED_Accessor_Mixed) {
+TEST_F(BuilderTest, DISABLED_Accessor_Mixed_ArrayAndMember) {
   // a[0].foo[2].bar.baz.yx
 }
 
+TEST_F(BuilderTest, DISABLED_MemberAccessor_Swizzle_of_Swizzle) {
+  // vec.yxz.xz
+}
+
+TEST_F(BuilderTest, DISABLED_MemberAccessor_Member_of_Swizzle) {
+  // vec.yxz.x
+}
+
+TEST_F(BuilderTest, DISABLED_MemberAccessor_Array_of_Swizzle) {
+  // vec.yxz[1]
+}
+
 }  // namespace
 }  // namespace spirv
 }  // namespace writer