Add tests for Tenancy vs Spot Price

builder/amazon/common/run_config.go

@@ -635,6 +635,12 @@ func (c *RunConfig) Prepare(ctx *interpolate.Context) []error {
 		}
 	}
 
+	if c.Tenancy != "" && c.Tenancy != "default" {
+		if c.SpotPrice != "" {
+			errs = append(errs, fmt.Errorf("Error: Non-default tenancy cannot be used in conjunction with Spot Instances"))
+		}
+	}
+
 	return errs
 }
 

builder/amazon/common/run_config_test.go

@@ -232,3 +232,23 @@ func TestRunConfigPrepare_TemporaryKeyPairName(t *testing.T) {
 		t.Fatal("keypair name does not match")
 	}
 }
+
+func TestRunConfigPrepare_TenancySpot(t *testing.T) {
+	c := testConfig()
+	c.Tenancy = "dedicated"
+	c.SpotPrice = "1"
+
+	if err := c.Prepare(nil); len(err) != 1 {
+		t.Fatal("Should error if non-default tenancy and spot price are both set")
+	}
+}
+
+func TestRunConfigPrepare_TenancySpotDefault(t *testing.T) {
+	c := testConfig()
+	c.Tenancy = "default"
+	c.SpotPrice = "1"
+
+	if err := c.Prepare(nil); len(err) != 0 {
+		t.Fatal("Should not error if tenancy is set to default with spot price")
+	}
+}