eval: Test Chdir.

eval/chdir_test.go

@@ -0,0 +1,55 @@
+package eval
+
+import (
+	"os"
+	"testing"
+	"time"
+
+	"github.com/elves/elvish/util"
+)
+
+type testAddDirer func(string, float64) error
+
+func (t testAddDirer) AddDir(dir string, weight float64) error {
+	return t(dir, weight)
+}
+
+func TestChdir(t *testing.T) {
+	util.WithTempDir(func(destDir string) {
+		pwd, err := os.Getwd()
+		if err != nil {
+			panic(err)
+		}
+		defer func() {
+			err = os.Chdir(pwd)
+			if err != nil {
+				panic(err)
+			}
+		}()
+
+		chanAddedDir := make(chan string)
+		testAddDirer := testAddDirer(func(dir string, weight float64) error {
+			chanAddedDir <- dir
+			return nil
+		})
+
+		err = Chdir(destDir, testAddDirer)
+
+		if err != nil {
+			t.Errorf("Chdir => error %v", err)
+		}
+
+		if env := os.Getenv("PWD"); env != destDir {
+			t.Errorf("$PWD is %q after Chdir, want %q", env, destDir)
+		}
+
+		select {
+		case addedDir := <-chanAddedDir:
+			if addedDir != destDir {
+				t.Errorf("Chdir called AddDir %q, want %q", addedDir[0], destDir)
+			}
+		case <-time.After(100 * time.Millisecond):
+			t.Errorf("Chdir did not call AddDir within 100ms")
+		}
+	})
+}