improved git coverage, code, and function

pipeline/git/git_test.go

@@ -1,6 +1,9 @@
 package git
 
 import (
+	"io/ioutil"
+	"os"
+	"os/exec"
 	"testing"
 
 	"github.com/goreleaser/goreleaser/config"
@@ -13,7 +16,7 @@ func TestDescription(t *testing.T) {
 }
 
 func TestValidVersion(t *testing.T) {
-	assert := assert.New(t)
+	var assert = assert.New(t)
 
 	var ctx = &context.Context{
 		Config: config.Project{},
@@ -23,3 +26,62 @@ func TestValidVersion(t *testing.T) {
 	assert.NotEmpty(ctx.Git.PreviousTag)
 	assert.NotEmpty(ctx.Git.Diff)
 }
+
+func TestNotAGitFolder(t *testing.T) {
+	var assert = assert.New(t)
+	_, back := createAndChdir(t)
+	defer back()
+	var ctx = &context.Context{
+		Config: config.Project{},
+	}
+	assert.Error(Pipe{}.Run(ctx))
+}
+
+func TestSingleCommit(t *testing.T) {
+	var assert = assert.New(t)
+	_, back := createAndChdir(t)
+	defer back()
+	assert.NoError(exec.Command("git", "init").Run())
+	assert.NoError(exec.Command("git", "commit", "--allow-empty", "-m", "asd").Run())
+	assert.NoError(exec.Command("git", "tag", "v0.0.1").Run())
+	var ctx = &context.Context{
+		Config: config.Project{},
+	}
+	assert.NoError(Pipe{}.Run(ctx))
+}
+
+func TestNewRepository(t *testing.T) {
+	var assert = assert.New(t)
+	_, back := createAndChdir(t)
+	defer back()
+	assert.NoError(exec.Command("git", "init").Run())
+	var ctx = &context.Context{
+		Config: config.Project{},
+	}
+	assert.Error(Pipe{}.Run(ctx))
+}
+
+func TestInvalidTagFormat(t *testing.T) {
+	var assert = assert.New(t)
+	_, back := createAndChdir(t)
+	defer back()
+	assert.NoError(exec.Command("git", "init").Run())
+	assert.NoError(exec.Command("git", "commit", "--allow-empty", "-m", "asd").Run())
+	assert.NoError(exec.Command("git", "tag", "sadasd").Run())
+	var ctx = &context.Context{
+		Config: config.Project{},
+	}
+	assert.EqualError(Pipe{}.Run(ctx), "sadasd is not in a valid version format")
+}
+
+func createAndChdir(t *testing.T) (current string, back func()) {
+	var assert = assert.New(t)
+	folder, err := ioutil.TempDir("", "gorelasertest")
+	assert.NoError(err)
+	previous, err := os.Getwd()
+	assert.NoError(err)
+	assert.NoError(os.Chdir(folder))
+	return folder, func() {
+		assert.NoError(os.Chdir(previous))
+	}
+}