prog, pkg/{csource,ifuzz,ipc,repro}: make tests deterministic on travis

Don't use random seed on travis as it produces flaky coverage reports,
and probably generally better for CI setting.

4 files changed, 14 insertions, 0 deletions

diff --git a/pkg/csource/csource_test.go b/pkg/csource/csource_test.go
index 4fccebd92..ce2db21c0 100644
--- a/pkg/csource/csource_test.go
+++ b/pkg/csource/csource_test.go
@@ -61,6 +61,9 @@ func TestGenerate(t *testing.T) {
 
 func testTarget(t *testing.T, target *prog.Target, full bool) {
 	seed := int64(time.Now().UnixNano())
+	if os.Getenv("TRAVIS") != "" {
+		seed = 0 // required for deterministic coverage reports
+	}
 	rs := rand.NewSource(seed)
 	t.Logf("seed=%v", seed)
 	p := target.Generate(rs, 10, nil)
diff --git a/pkg/ifuzz/ifuzz_test.go b/pkg/ifuzz/ifuzz_test.go
index bc5408a6f..3758f08d2 100644
--- a/pkg/ifuzz/ifuzz_test.go
+++ b/pkg/ifuzz/ifuzz_test.go
@@ -6,6 +6,7 @@ package ifuzz_test
 import (
 	"encoding/hex"
 	"math/rand"
+	"os"
 	"testing"
 	"time"
 
@@ -36,6 +37,9 @@ func TestMode(t *testing.T) {
 
 func TestDecode(t *testing.T) {
 	seed := int64(time.Now().UnixNano())
+	if os.Getenv("TRAVIS") != "" {
+		seed = 0 // required for deterministic coverage reports
+	}
 	t.Logf("seed=%v", seed)
 	r := rand.New(rand.NewSource(seed))
 
diff --git a/pkg/ipc/ipc_test.go b/pkg/ipc/ipc_test.go
index dba14b190..d168a2535 100644
--- a/pkg/ipc/ipc_test.go
+++ b/pkg/ipc/ipc_test.go
@@ -38,6 +38,9 @@ func initTest(t *testing.T) (*prog.Target, rand.Source, int, EnvFlags) {
 		iters = 10
 	}
 	seed := int64(time.Now().UnixNano())
+	if os.Getenv("TRAVIS") != "" {
+		seed = 0 // required for deterministic coverage reports
+	}
 	rs := rand.NewSource(seed)
 	t.Logf("seed=%v", seed)
 	target, err := prog.GetTarget(runtime.GOOS, runtime.GOARCH)
diff --git a/pkg/repro/repro_test.go b/pkg/repro/repro_test.go
index a62354ca0..349b412fc 100644
--- a/pkg/repro/repro_test.go
+++ b/pkg/repro/repro_test.go
@@ -5,6 +5,7 @@ package repro
 
 import (
 	"math/rand"
+	"os"
 	"testing"
 	"time"
 
@@ -18,6 +19,9 @@ func initTest(t *testing.T) (*rand.Rand, int) {
 		iters = 100
 	}
 	seed := int64(time.Now().UnixNano())
+	if os.Getenv("TRAVIS") != "" {
+		seed = 0 // required for deterministic coverage reports
+	}
 	rs := rand.NewSource(seed)
 	t.Logf("seed=%v", seed)
 	return rand.New(rs), iters