[#674] Continue working on test case for introspective variant

- add a list of received commands in VCS fake so that we can test that we got "commit && revert"
- add vcsfake.GetLastCommands(n) to get the tail of the list of last commands
- add vcsfake.VerifyLastCommandsAre() as an alternative approach

src/engine/tcr_test.go

@@ -370,9 +370,10 @@ func Test_introspective_variant(t *testing.T) {
 		})
 
 	tcr.revert(*events.ATcrEvent())
-	//sniffer.Stop()
-	assert.Equal(t, fake.RestoreCommand, vcsFake.GetLastCommand())
-	//assert.Equal(t, 1, sniffer.GetMatchCount())
+	assert.Equal(t, []fake.Command{fake.CommitCommand, fake.RevertCommand}, vcsFake.GetLastCommands(2))
+
+	//assert.True(t, vcsFake.VerifyLastCommandsAre(fake.CommitCommand, fake.RevertCommand),
+	//	"got %v", vcsFake.GetLastCommands())
 
 }
 

src/vcs/fake/vcs_test_fake.go

@@ -26,6 +26,7 @@ package fake
 
 import (
 	"errors"
+	"github.com/google/go-cmp/cmp"
 	"github.com/murex/tcr/vcs"
 )
 
@@ -75,14 +76,14 @@ type (
 
 	// VCSFake provides a fake implementation of the VCS interface
 	VCSFake struct {
-		settings    Settings
-		pushEnabled bool
-		lastCommand Command
+		settings     Settings
+		pushEnabled  bool
+		lastCommands []Command
 	}
 )
 
 func (vf *VCSFake) fakeCommand(cmd Command) (err error) {
-	vf.lastCommand = cmd
+	vf.lastCommands = append(vf.lastCommands, cmd)
 	if vf.settings.FailingCommands.contains(cmd) {
 		err = errors.New(vf.Name() + " " + string(cmd) + " error")
 	}
@@ -92,7 +93,7 @@ func (vf *VCSFake) fakeCommand(cmd Command) (err error) {
 // NewVCSFake initializes a fake VCS implementation which does nothing
 // apart from emulating errors on VCS operations
 func NewVCSFake(settings Settings) *VCSFake {
-	return &VCSFake{settings: settings}
+	return &VCSFake{settings: settings, lastCommands: make([]Command, 0)}
 }
 
 // Name returns VCS name
@@ -107,7 +108,18 @@ func (vf *VCSFake) SessionSummary() string {
 
 // GetLastCommand returns the last command called
 func (vf *VCSFake) GetLastCommand() Command {
-	return vf.lastCommand
+	return vf.GetLastCommands(1)[0]
+}
+
+// GetLastCommands returns the last commands called
+func (vf *VCSFake) GetLastCommands(count int) []Command {
+	return vf.lastCommands[len(vf.lastCommands)-count:]
+}
+
+// VerifyLastCommandsAre checks if last executed commands are the provided ones
+func (vf *VCSFake) VerifyLastCommandsAre(expectedCommands ...Command) bool {
+	actual := vf.lastCommands[len(vf.lastCommands)-len(expectedCommands):]
+	return cmp.Equal(actual, expectedCommands)
 }
 
 // Add does nothing. Returns an error if in the list of failing commands