Enable test code coverage reports in Xcode and in Travis CI. (#1115)

Author: ajsecord

catalog/MDCCatalog.xcodeproj/xcshareddata/xcschemes/MDCCatalog.xcscheme

@@ -26,7 +26,8 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES">
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      codeCoverageEnabled = "YES">
       <Testables>
          <TestableReference
             skipped = "NO">

scripts/test_all

@@ -16,7 +16,8 @@
 
 readonly SCRIPTS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 readonly ROOT_DIR="$(dirname $SCRIPTS_DIR)"
-readonly DESTINATION='platform=iOS Simulator,name=iPhone 7,OS=10.1'
+readonly DESTINATION="platform=iOS Simulator,name=iPhone 7,OS=10.1"
+readonly COVERAGE_OPTIONS="GCC_INSTRUMENT_PROGRAM_FLOW_ARCS=YES GCC_GENERATE_TEST_COVERAGE_FILES=YES -enableCodeCoverage YES"
 
 # Given a path to an Xcode log file in $1, print a guess at what caused the
 # failure.
@@ -40,7 +41,8 @@ for workspace_scheme in $WORKSPACE_SCHEMES; do
   fi
   echo $workspace $scheme
   log_file=$(dirname "$workspace")/"test_log_for_scheme_${scheme}.txt"
-  if xcodebuild test -workspace "$workspace" -scheme "$scheme" -destination "$DESTINATION" $1 >"$log_file" 2>&1; then
+  options="-workspace $workspace -scheme $scheme"
+  if xcodebuild test $options $COVERAGE_OPTIONS -destination "$DESTINATION" >"$log_file" 2>&1; then
     rm "$log_file"
   else
     all_tests_ok=0