Default analysis tests to use Python 3

This matches the behavior outside of the tests.

Work towards #7903

PiperOrigin-RevId: 452140874
Change-Id: Icab37d01657b07ef6f56366a1e0b64f0f3d26c29

Author: rickeylev

src/test/java/com/google/devtools/build/lib/buildtool/CompileOneDependencyIntegrationTest.java

@@ -39,7 +39,6 @@ public void testPyBinaryMember() throws Exception {
     addOptions("--compile_one_dependency");
     // Make build super minimal.
     addOptions("--nobuild_runfile_links");
-
     write("package/BUILD", "py_binary(name='foo', srcs=['foo.py'])");
     write("package/foo.py");
     buildTarget("package/foo.py");

src/test/java/com/google/devtools/build/lib/rules/python/PyBaseConfiguredTargetTestBase.java

@@ -15,7 +15,6 @@
 package com.google.devtools.build.lib.rules.python;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.devtools.build.lib.rules.python.PythonTestUtils.assumesDefaultIsPY2;
 
 import com.google.devtools.build.lib.analysis.ConfiguredTarget;
 import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
@@ -68,14 +67,13 @@ public void goodSrcsVersionValue() throws Exception {
   }
 
   @Test
-  public void versionIs2IfUnspecified() throws Exception {
-    assumesDefaultIsPY2();
+  public void versionIs3IfUnspecified() throws Exception {
     scratch.file(
         "pkg/BUILD", //
         ruleName + "(",
         "    name = 'foo',",
         "    srcs = ['foo.py'])");
-    assertThat(getPythonVersion(getConfiguredTarget("//pkg:foo"))).isEqualTo(PythonVersion.PY2);
+    assertThat(getPythonVersion(getConfiguredTarget("//pkg:foo"))).isEqualTo(PythonVersion.PY3);
   }
 
   @Test

src/test/java/com/google/devtools/build/lib/rules/python/PyRuntimeConfiguredTargetTest.java

@@ -15,7 +15,6 @@
 package com.google.devtools.build.lib.rules.python;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.devtools.build.lib.rules.python.PythonTestUtils.assumesDefaultIsPY2;
 
 import com.google.devtools.build.lib.actions.util.ActionsTestUtil;
 import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
@@ -72,27 +71,26 @@ public void nonhermeticRuntime() throws Exception {
 
   @Test
   public void pythonVersionDefault() throws Exception {
-    assumesDefaultIsPY2();
     // When using toolchains, the python_version attribute is mandatory.
     useConfiguration("--incompatible_use_python_toolchains=false");
     scratch.file(
         "pkg/BUILD",
         "py_runtime(",
         "    name = 'myruntime_default',",
-        "    interpreter_path = '/system/interpreter',",
+        "    interpreter_path = '/default/interpreter',",
         ")",
         "py_runtime(",
         "    name = 'myruntime_explicit',",
-        "    interpreter_path = '/system/interpreter',",
-        "    python_version = 'PY3',",
+        "    interpreter_path = '/explicit/interpreter',",
+        "    python_version = 'PY2',",
         ")");
     PyRuntimeInfo infoDefault =
         getConfiguredTarget("//pkg:myruntime_default").get(PyRuntimeInfo.PROVIDER);
     PyRuntimeInfo infoExplicit =
         getConfiguredTarget("//pkg:myruntime_explicit").get(PyRuntimeInfo.PROVIDER);
 
-    assertThat(infoDefault.getPythonVersion()).isEqualTo(PythonVersion.PY2);
-    assertThat(infoExplicit.getPythonVersion()).isEqualTo(PythonVersion.PY3);
+    assertThat(infoDefault.getPythonVersion()).isEqualTo(PythonVersion.PY3);
+    assertThat(infoExplicit.getPythonVersion()).isEqualTo(PythonVersion.PY2);
   }
 
   @Test

src/test/java/com/google/devtools/build/lib/rules/python/PythonConfigurationTest.java

@@ -132,9 +132,8 @@ public void getHost_Py3IsDefaultFlagChangesHost() throws Exception {
 
   @Test
   public void getNormalized() throws Exception {
-    assumesDefaultIsPY2();
     PythonOptions opts = parsePythonOptions();
     PythonOptions normalizedOpts = (PythonOptions) opts.getNormalized();
-    assertThat(normalizedOpts.pythonVersion).isEqualTo(PythonVersion.PY2);
+    assertThat(normalizedOpts.pythonVersion).isEqualTo(PythonVersion.PY3);
   }
 }

src/test/java/com/google/devtools/build/lib/rules/python/PythonStarlarkApiTest.java

@@ -142,7 +142,7 @@ public void runtimeSandwich() throws Exception {
         "    name = 'pyruntime',",
         "    interpreter = ':intr',",
         "    files = ['data.txt'],",
-        "    python_version = 'PY2',",
+        "    python_version = 'PY3',",
         ")",
         "userruntime(",
         "    name = 'userruntime',",
@@ -152,7 +152,7 @@ public void runtimeSandwich() throws Exception {
         ")",
         "py_runtime_pair(",
         "    name = 'userruntime_pair',",
-        "    py2_runtime = 'userruntime',",
+        "    py3_runtime = 'userruntime',",
         ")",
         "toolchain(",
         "    name = 'usertoolchain',",

src/test/java/com/google/devtools/build/lib/rules/python/PythonTestUtils.java

@@ -29,10 +29,6 @@ private PythonTestUtils() {}
    * <p>Marking test cases that depend on the default Python version helps to diagnose failures. It
    * also helps guard against accidentally making the test spuriously pass, e.g. if the expected
    * value becomes the same as the default value..
-   *
-   * <p>Although the hard-coded default in {@link PythonOptions} has been flipped to PY3, we
-   * override this back to PY2 in our analysis-time tests and some of our integration tests. These
-   * tests will need to be ported in the future.
    */
   public static void assumesDefaultIsPY2() {
     // No-op.

src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java

@@ -132,9 +132,6 @@ private TestConstants() {
           "--target_platform_fallback=@bazel_tools//platforms:default_target",
           "--platforms=@bazel_tools//platforms:default_target",
           "--host_platform=@bazel_tools//platforms:default_host",
-          // TODO(#7903): Remove once our own tests are migrated.
-          "--incompatible_py3_is_default=false",
-          "--incompatible_py2_outputs_are_suffixed=false",
           // TODO(#7849): Remove after flag flip.
           "--incompatible_use_toolchain_resolution_for_java_rules");