add negative tests

Signed-off-by: S.Cavallo <smcavallo@hotmail.com>

cmd/helm/template_test.go

@@ -45,6 +45,12 @@ func TestTemplateCmd(t *testing.T) {
 		expectValue string
 		expectError string
 	}{
+		{
+			name:        "check_negative_test",
+			desc:        "run a negative check to test verification failures",
+			args:        []string{subchart1ChartPath, "--test-outfile", filepath.Join(fixtureAbsPath, "subpop_fail_service.yaml")},
+			expectError: "verification failed",
+		},
 		{
 			name:        "check_name",
 			desc:        "check for a known name in chart",
@@ -63,6 +69,12 @@ func TestTemplateCmd(t *testing.T) {
 			args:        []string{subchart1ChartPath, "-x", "templates/thisdoesn'texist.yaml"},
 			expectError: "could not find template",
 		},
+		{
+			name:        "check_execute_non_existent_outfile",
+			desc:        "verify --execute fails on a test file which doesn't exist",
+			args:        []string{subchart1ChartPath, "--test-outfile", filepath.Join(fixtureAbsPath, "does_not_exist.yaml")},
+			expectError: "does not exist",
+		},
 		{
 			name:        "check_execute_absolute",
 			desc:        "verify --execute single template",

cmd/helm/testdata/testcharts/chart-verify-templates/subpop_fail_service.yaml

@@ -0,0 +1,17 @@
+---
+# Source: subchart1/charts/subcharta/templates/service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: subcharta
+  labels:
+    chart: "subcharta-0.1.0"
+spec:
+  type: ClusterIP
+  ports:
+  - port: 80
+    targetPort: 80
+    protocol: TCP
+    name: fail_verification
+  selector:
+    app: subcharta