Fix disk size test

Default minimum and maximum sizes were geared towards spinning up windows server instances. Linux instances are far more efficient and make do with lower requirements. Set the minimum sizes to match this.

builder/hyperv/iso/builder.go

@@ -22,15 +22,15 @@ import (
 )
 
 const (
-	DefaultDiskSize = 40000        // ~40GB
-	MinDiskSize     = 10 * 1024    // 10GB
-	MaxDiskSize     = 65536 * 1024 // 64TB
+	DefaultDiskSize = 40 * 1024   // ~40GB
+	MinDiskSize     = 256    // 256MB
+	MaxDiskSize     = 64 * 1024 * 1024 // 64TB
 
-	DefaultRamSize = 1024  // 1GB
-	MinRamSize     = 512   // 512MB
-	MaxRamSize     = 32768 // 32GB
+	DefaultRamSize = 1 * 1024  // 1GB
+	MinRamSize     = 32   // 32MB
+	MaxRamSize     = 32 * 1024 // 32GB
 
-	LowRam = 512 // 512MB
+	LowRam = 384 // 384MB
 
 	DefaultUsername = "vagrant"
 	DefaultPassword = "vagrant"
@@ -416,9 +416,9 @@ func (b *Builder) checkDiskSize() error {
 	log.Println(fmt.Sprintf("%s: %v", "DiskSize", b.config.DiskSize))
 
 	if b.config.DiskSize < MinDiskSize {
-		return fmt.Errorf("disk_size_gb: Windows server requires disk space >= %v GB, but defined: %v", MinDiskSize, b.config.DiskSize/1024)
+		return fmt.Errorf("disk_size_gb: Virtual machine requires disk space >= %v GB, but defined: %v", MinDiskSize, b.config.DiskSize/1024)
 	} else if b.config.DiskSize > MaxDiskSize {
-		return fmt.Errorf("disk_size_gb: Windows server requires disk space <= %v GB, but defined: %v", MaxDiskSize, b.config.DiskSize/1024)
+		return fmt.Errorf("disk_size_gb: Virtual machine requires disk space <= %v GB, but defined: %v", MaxDiskSize, b.config.DiskSize/1024)
 	}
 
 	return nil
@@ -432,9 +432,9 @@ func (b *Builder) checkRamSize() error {
 	log.Println(fmt.Sprintf("%s: %v", "RamSize", b.config.RamSizeMB))
 
 	if b.config.RamSizeMB < MinRamSize {
-		return fmt.Errorf("ram_size_mb: Windows server requires memory size >= %v MB, but defined: %v", MinRamSize, b.config.RamSizeMB)
+		return fmt.Errorf("ram_size_mb: Virtual machine requires memory size >= %v MB, but defined: %v", MinRamSize, b.config.RamSizeMB)
 	} else if b.config.RamSizeMB > MaxRamSize {
-		return fmt.Errorf("ram_size_mb: Windows server requires memory size <= %v MB, but defined: %v", MaxRamSize, b.config.RamSizeMB)
+		return fmt.Errorf("ram_size_mb: Virtual machine requires memory size <= %v MB, but defined: %v", MaxRamSize, b.config.RamSizeMB)
 	}
 
 	return nil

builder/hyperv/iso/builder_test.go

@@ -13,7 +13,8 @@ func testConfig() map[string]interface{} {
 		"iso_url":           "http://www.packer.io",
 		"shutdown_command":  "yes",
 		"ssh_username":      "foo",
-
+		"ram_size_mb":       64,
+		"disk_size":       	 256,
 		packer.BuildNameConfigKey: "foo",
 	}
 }
@@ -55,11 +56,11 @@ func TestBuilderPrepare_DiskSize(t *testing.T) {
 		t.Fatalf("bad err: %s", err)
 	}
 
-	if b.config.DiskSize != 40000 {
+	if b.config.DiskSize != 40 * 1024 {
 		t.Fatalf("bad size: %d", b.config.DiskSize)
 	}
 
-	config["disk_size"] = 60000
+	config["disk_size"] = 256
 	b = Builder{}
 	warns, err = b.Prepare(config)
 	if len(warns) > 0 {
@@ -69,7 +70,7 @@ func TestBuilderPrepare_DiskSize(t *testing.T) {
 		t.Fatalf("should not have error: %s", err)
 	}
 
-	if b.config.DiskSize != 60000 {
+	if b.config.DiskSize != 256 {
 		t.Fatalf("bad size: %d", b.config.DiskSize)
 	}
 }