travis.yml: run with golang modules turned on

Author: ugorji

.travis.yml

@@ -1,9 +1,7 @@
 language: go
 sudo: false
 env:
-  # Turn off go module support, as the go.sum files in go/ and go/codec/
-  # need to be populated with their cyclic checksums, so CI's mod=readonly will not work.
-  - GO111MODULE=off
+  - GO111MODULE=on
 branches:
   only:
     - master
@@ -14,34 +12,33 @@ go:
   - 1.13.x
   - 1.12.x
   - 1.11.x
-  # go testing suite support, which we use, was introduced in go 1.7
-  # testing.TB, TB.Helper() was introduced in go 1.9
-  # Consequently, tests will only compile for go 1.9+
+  # go testing suite support was introduced in go 1.7, thus tests will only compile for go 1.7+.
+  # Once we introduce TB.Helper() support (introduced in go 1.9), then tests will only run from go 1.9+.
 script:
-  - go test -tags "alltests" -run Suite -coverprofile coverage.txt github.com/ugorji/go/codec
+  - go test -mod=mod -tags "alltests" -run Suite -coverprofile coverage.txt github.com/ugorji/go/codec
   - go test -tags "alltests safe" -run Suite -coverprofile coverage.safe.txt github.com/ugorji/go/codec
   - go test -tags "alltests codecgen" -run Suite -coverprofile coverage.codecgen.txt github.com/ugorji/go/codec
   # we use if block below, so that we still return with success even if skipped.
   # Previously, we used [[...]] && go test ..., which returned exit code 0 and broke the build.
   - |
     if [[ "${TRAVIS_GO_VERSION}" == "1.11.x" ]]; then
-    GOARCH=386 go test -tags "alltests" -run Suite -coverprofile coverage.386.txt github.com/ugorji/go/codec
+    echo "XXX 386" && GOARCH=386 go test -tags "alltests" -run Suite -coverprofile coverage.386.txt github.com/ugorji/go/codec
     fi
   - |
     if [[ "${TRAVIS_GO_VERSION}" == "1.12.x" ]]; then
-    GOARCH=386 go test -tags "alltests safe" -run Suite -coverprofile coverage.386.safe.txt github.com/ugorji/go/codec
+    echo "XXX 386 safe" && GOARCH=386 go test -tags "alltests safe" -run Suite -coverprofile coverage.386.safe.txt github.com/ugorji/go/codec
     fi
   - |
     if [[ "${TRAVIS_GO_VERSION}" == "1.13.x" ]]; then
-    GOARCH=386 go test -tags "alltests codecgen" -run Suite -coverprofile coverage.386.codecgen.txt github.com/ugorji/go/codec
+    echo "XXX 386 codecgen" && GOARCH=386 go test -tags "alltests codecgen" -run Suite -coverprofile coverage.386.codecgen.txt github.com/ugorji/go/codec
     fi
   - |
     if [[ "${TRAVIS_GO_VERSION}" == "1.14.x" ]]; then
-    echo "XXXX RACE notfastpath" && go test "-race" -tags "alltests notfastpath safe" -run Suite -coverprofile coverage.race.txt github.com/ugorji/go/codec;
+    echo "XXX RACE notfastpath safe" && go test "-race" -tags "alltests notfastpath safe" -run Suite -coverprofile coverage.race.txt github.com/ugorji/go/codec;
     fi
   - |
     if [[ "${TRAVIS_GO_VERSION}" == "1.15.x" ]]; then
-    echo "XXXX RACE" && go test "-race" -tags "alltests" -run Suite -coverprofile coverage.race.txt github.com/ugorji/go/codec;
+    echo "XXX RACE" && go test "-race" -tags "alltests" -run Suite -coverprofile coverage.race.txt github.com/ugorji/go/codec;
     fi
 
 after_success: