helper/schema: More tests for Set.HashEqual

Just to make sure equality on outer and inner values does not affect
anything.

helper/schema/set_test.go

@@ -162,8 +162,18 @@ func TestHashEqual(t *testing.T) {
 		"bar":    "qux",
 		"nested": NewSet(HashResource(nested), []interface{}{n2}),
 	}
+	r3 := map[string]interface{}{
+		"bar":    "baz",
+		"nested": NewSet(HashResource(nested), []interface{}{n2}),
+	}
+	r4 := map[string]interface{}{
+		"bar":    "qux",
+		"nested": NewSet(HashResource(nested), []interface{}{n1}),
+	}
 	s1 := NewSet(HashResource(root), []interface{}{r1})
 	s2 := NewSet(HashResource(root), []interface{}{r2})
+	s3 := NewSet(HashResource(root), []interface{}{r3})
+	s4 := NewSet(HashResource(root), []interface{}{r4})
 
 	cases := []struct {
 		name     string
@@ -183,6 +193,18 @@ func TestHashEqual(t *testing.T) {
 			compare:  s2,
 			expected: false,
 		},
+		{
+			name:     "outer equal, should still not be equal",
+			set:      s1,
+			compare:  s3,
+			expected: false,
+		},
+		{
+			name:     "inner equal, should still not be equal",
+			set:      s1,
+			compare:  s4,
+			expected: false,
+		},
 	}
 	for _, tc := range cases {
 		t.Run(tc.name, func(t *testing.T) {