[ConfigImpact] Add config impact differential test in ObjC

Reviewed By: ezgicicek

Differential Revision: D28256508

fbshipit-source-id: e18cc400f

.gitignore

@@ -50,6 +50,7 @@ duplicates.txt
 /infer/tests/build_systems/differential_*/**/Diff*.java
 /infer/tests/build_systems/differential_*/**/Diff*.m
 /infer/tests/build_systems/fb_differential_*/**/Diff*.java
+/infer/tests/build_systems/fb_differential_*/**/Diff*.m
 /infer/tests/build_systems/incremental_analysis_remove_file/src
 /infer/tests/build_systems/incremental_analysis_cost_change/src
 /infer/tests/build_systems/incremental_analysis_add_procedure/src

Makefile

@@ -130,6 +130,9 @@ DIRECT_TESTS += \
   objcpp_retain-cycles \
 
 ifeq ($(IS_FACEBOOK_TREE),yes)
+BUILD_SYSTEMS_TESTS += \
+  fb_differential_of_config_impact_report_objc
+
 DIRECT_TESTS += \
   objc_fb-config-impact \
   objc_fb-gk-interaction

infer/tests/build_systems/fb_differential_of_config_impact_report_objc/Makefile

@@ -0,0 +1,31 @@
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+TESTS_DIR = ../..
+SOURCES = src/DiffExample.current.m src/DiffExample.previous.m
+COPIED = src/DiffExample.m
+CLEAN_EXTRA = $(COPIED) *.o
+CLANG_OPTIONS = -c $(OBJC_CLANG_OPTIONS)
+DIFFERENTIAL_ARGS = --enable-issue-type CONFIG_IMPACT
+INFERPRINT_ISSUES_FIELDS = "bug_type,bucket,file,procedure,line_offset,bug_trace"
+
+include $(TESTS_DIR)/differential-config-impact.make
+include $(TESTS_DIR)/objc.make
+
+$(CURRENT_REPORT) $(PREVIOUS_REPORT): $(OBJC_DEPS)
+
+$(CURRENT_REPORT):
+	$(QUIET)$(COPY) src/DiffExample.current.m src/DiffExample.m
+	$(QUIET)$(call silent_on_success,Testing ObjC Config Impact Differential: current,\
+	$(INFER_BIN) --no-filtering --config-impact-analysis-only \
+	  --config-impact-data-file config_data.json -o $(CURRENT_DIR) \
+	  -- clang $(CLANG_OPTIONS) $(COPIED))
+
+$(PREVIOUS_REPORT):
+	$(QUIET)$(COPY) src/DiffExample.previous.m src/DiffExample.m
+	$(QUIET)$(call silent_on_success,Testing ObjC Config Impact Differential: previous,\
+	$(INFER_BIN) --no-filtering --config-impact-analysis-only \
+	  --config-impact-data-file config_data.json -o $(PREVIOUS_DIR) \
+	  -- clang $(CLANG_OPTIONS) $(COPIED))