Update tests that assume no vertical class merging

Change-Id: I5b8ac4a98d762f9a0c410922432db0a5f14b5082
diff --git a/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/defaultctor/ImplicitlyKeptDefaultConstructorTest.java b/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/defaultctor/ImplicitlyKeptDefaultConstructorTest.java
index 9edb509..61b1454 100644
--- a/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/defaultctor/ImplicitlyKeptDefaultConstructorTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/defaultctor/ImplicitlyKeptDefaultConstructorTest.java
@@ -155,7 +155,8 @@
     runTest(
         mainClass,
         ImmutableList.of(mainClass, SuperClass.class, SubClass.class),
-        keepMainProguardConfiguration(mainClass),
+        // Prevent SuperClass from being merged into SubClass.
+        keepMainProguardConfiguration(mainClass, ImmutableList.of("-keep class **.SuperClass")),
         this::checkAllClassesPresentWithDefaultConstructor);
   }
 
@@ -166,7 +167,8 @@
     runTest(
         mainClass,
         ImmutableList.of(mainClass, SuperClass.class, SubClass.class),
-        keepMainProguardConfiguration(mainClass),
+        // Prevent SuperClass from being merged into SubClass.
+        keepMainProguardConfiguration(mainClass, ImmutableList.of("-keep class **.SuperClass")),
         this::checkAllClassesPresentWithDefaultConstructor);
   }
 
@@ -177,7 +179,8 @@
     runTest(
         mainClass,
         ImmutableList.of(mainClass, SuperClass.class, SubClass.class),
-        keepMainProguardConfiguration(mainClass),
+        // Prevent SuperClass from being merged into SubClass.
+        keepMainProguardConfiguration(mainClass, ImmutableList.of("-keep class **.SuperClass")),
         // TODO(74423424): Proguard eliminates the check-cast on null.
         this::checkAllClassesPresentWithDefaultConstructor,
         this::checkOnlyMainPresent);
@@ -191,7 +194,9 @@
     runTest(
         mainClass,
         ImmutableList.of(mainClass, SuperClass.class, SubClass.class),
-        keepMainProguardConfiguration(mainClass, ImmutableList.of("-dontoptimize")),
+        // Prevent SuperClass from being merged into SubClass.
+        keepMainProguardConfiguration(
+            mainClass, ImmutableList.of("-dontoptimize", "-keep class **.SuperClass")),
         this::checkAllClassesPresentWithDefaultConstructor);
   }
 
@@ -202,7 +207,8 @@
     runTest(
         mainClass,
         ImmutableList.of(mainClass, SuperClass.class, SubClass.class),
-        keepMainProguardConfiguration(mainClass),
+        // Prevent SuperClass from being merged into SubClass.
+        keepMainProguardConfiguration(mainClass, ImmutableList.of("-keep class **.SuperClass")),
         this::checkAllClassesPresentWithDefaultConstructor);
   }
 
diff --git a/src/test/java/com/android/tools/r8/shaking/ifrule/IfOnFieldTest.java b/src/test/java/com/android/tools/r8/shaking/ifrule/IfOnFieldTest.java
index 73c3011..7480e2e 100644
--- a/src/test/java/com/android/tools/r8/shaking/ifrule/IfOnFieldTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/ifrule/IfOnFieldTest.java
@@ -187,19 +187,20 @@
 
   @Test
   public void ifOnFieldInImplementer_withoutNthWildcard() throws Exception {
-    List<String> config = ImmutableList.of(
-        "-keep class **.MainUsesImpl {",
-        "  public static void main(java.lang.String[]);",
-        "}",
-        "-if class ** implements **.I {",
-        "  private <fields>;",
-        "}",
-        "-keep class **.D1",
-        "-if class ** implements **.I {",
-        "  public <fields>;",
-        "}",
-        "-keep class **.D2"
-    );
+    List<String> config =
+        ImmutableList.of(
+            "-keep class **.MainUsesImpl {",
+            "  public static void main(java.lang.String[]);",
+            "}",
+            "-keep class **.I", // Prevent I from being merged into Impl.
+            "-if class ** implements **.I {",
+            "  private <fields>;",
+            "}",
+            "-keep class **.D1",
+            "-if class ** implements **.I {",
+            "  public <fields>;",
+            "}",
+            "-keep class **.D2");
 
     DexInspector dexInspector = runShrinker(shrinker, CLASSES, config);
     verifyClassesAbsent(dexInspector, D2.class);
@@ -209,19 +210,20 @@
 
   @Test
   public void ifOnFieldInImplementer_withNthWildcard() throws Exception {
-    List<String> config = ImmutableList.of(
-        "-keep class **.MainUsesImpl {",
-        "  public static void main(java.lang.String[]);",
-        "}",
-        "-if class ** implements **.I {",
-        "  private <fields>;",
-        "}",
-        "-keep class <2>.D1",
-        "-if class ** implements **.I {",
-        "  public <fields>;",
-        "}",
-        "-keep class <2>.D2"
-    );
+    List<String> config =
+        ImmutableList.of(
+            "-keep class **.MainUsesImpl {",
+            "  public static void main(java.lang.String[]);",
+            "}",
+            "-keep class **.I", // Prevent I from being merged into Impl.
+            "-if class ** implements **.I {",
+            "  private <fields>;",
+            "}",
+            "-keep class <2>.D1",
+            "-if class ** implements **.I {",
+            "  public <fields>;",
+            "}",
+            "-keep class <2>.D2");
 
     DexInspector dexInspector = runShrinker(shrinker, CLASSES, config);
     verifyClassesAbsent(dexInspector, D2.class);